{"pageNumber":"909","pageRowStart":"22700","pageSize":"25","recordCount":40797,"records":[{"id":70031762,"text":"70031762 - 2008 - Modeling multi-layer effects in passive microwave remote sensing of dry snow using Dense Media Radiative Transfer Theory (DMRT) based on quasicrystalline approximation","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031762","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Modeling multi-layer effects in passive microwave remote sensing of dry snow using Dense Media Radiative Transfer Theory (DMRT) based on quasicrystalline approximation","docAbstract":"The Dense Media Radiative Transfer theory (DMRT) of Quasicrystalline Approximation of Mie scattering by sticky particles is used to study the multiple scattering effects in layered snow in microwave remote sensing. Results are illustrated for various snow profile characteristics. Polarization differences and frequency dependences of multilayer snow model are significantly different from that of the single-layer snow model. Comparisons are also made with CLPX data using snow parameters as given by the VIC model. ?? 2007 IEEE.","largerWorkTitle":"International Geoscience and Remote Sensing Symposium (IGARSS)","conferenceTitle":"2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007","conferenceDate":"23 June 2007 through 28 June 2007","conferenceLocation":"Barcelona","language":"English","doi":"10.1109/IGARSS.2007.4423024","isbn":"1424412129; 9781424412129","usgsCitation":"Liang, D., Xu, X., Tsang, L., Andreadis, K., and Josberger, E., 2008, Modeling multi-layer effects in passive microwave remote sensing of dry snow using Dense Media Radiative Transfer Theory (DMRT) based on quasicrystalline approximation, <i>in</i> International Geoscience and Remote Sensing Symposium (IGARSS), Barcelona, 23 June 2007 through 28 June 2007, p. 1215-1218, https://doi.org/10.1109/IGARSS.2007.4423024.","startPage":"1215","endPage":"1218","numberOfPages":"4","costCenters":[],"links":[{"id":212518,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1109/IGARSS.2007.4423024"},{"id":240013,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5c0de4b0c8380cd6f9c3","contributors":{"authors":[{"text":"Liang, D.","contributorId":66483,"corporation":false,"usgs":true,"family":"Liang","given":"D.","email":"","affiliations":[],"preferred":false,"id":433017,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Xu, X.","contributorId":55166,"corporation":false,"usgs":true,"family":"Xu","given":"X.","email":"","affiliations":[],"preferred":false,"id":433015,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tsang, L.","contributorId":43950,"corporation":false,"usgs":true,"family":"Tsang","given":"L.","email":"","affiliations":[],"preferred":false,"id":433014,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Andreadis, K.M.","contributorId":8294,"corporation":false,"usgs":true,"family":"Andreadis","given":"K.M.","email":"","affiliations":[],"preferred":false,"id":433013,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Josberger, E.G.","contributorId":61161,"corporation":false,"usgs":true,"family":"Josberger","given":"E.G.","email":"","affiliations":[],"preferred":false,"id":433016,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031758,"text":"70031758 - 2008 - Biological assessments of Appalachian streams based on predictive models for fish, macroinvertebrate, and diatom assemblages","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031758","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2564,"text":"Journal of the North American Benthological Society","onlineIssn":"1937-237X","printIssn":"0887-3593","active":true,"publicationSubtype":{"id":10}},"title":"Biological assessments of Appalachian streams based on predictive models for fish, macroinvertebrate, and diatom assemblages","docAbstract":"We developed empirical models for fish, macroinvertebrate, and diatom assemblages to assess the biological condition of 268 streams sampled from 1993 to 2002 in 7 major river basins in the Appalachian region of the USA. These models estimate the expected taxonomic composition at each site based on observed variation in taxonomic composition at reference sites. The index, O/E, is the ratio of the number of predicted taxa that were observed (O) to that expected (E) to occur at a site and is a measure of taxonomic completeness. We compared how O/E for each assemblage varied among major landuse settings and whether impaired assemblages were associated with particular physicochemical conditions. We also examined concordance among assemblages in their response to stress. Biological, chemical, and physical data were collected following consistent protocols. We used land-cover criteria, published data, and topographic maps to classify sites by major landuse setting. Fish, macroinvertebrate, and diatom assemblages had been sampled at 73, 108, and 52, respectively, of the least disturbed sites used to establish reference conditions. The models accounted for a substantial portion of the natural variation in taxonomic composition across sites that was associated with biogeographic, climatic, and basin-scale factors and generally were unbiased across the range of environmental gradients observed in the region. Assessments at nonreference sites showed that impairment of fish and macroinvertebrate assemblages was most strongly associated with agriculture and urban land uses, whereas impairment of diatom assemblages was most strongly associated with mining in the basin. Concordance in assessments among assemblages was not strong. Assessments based on 2 assemblages differed in 28 to 57% of cases, and assessments were never concordant for cases where all 3 assemblages were sampled. Furthermore, only 1/2 of these cases would have been assessed as ecologically impaired had only 1 assemblage been sampled. Differences between observed and predicted frequencies of occurrence for individual taxa were generally consistent with known tolerances to environmental stressors and might aid in identifying causes of biological impairment. ?? 2008 by The North American Benthological Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the North American Benthological Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1899/06-081.1","issn":"08873593","usgsCitation":"Carlisle, D., Hawkins, C., Meador, M.R., Potapova, M., and Falcone, J., 2008, Biological assessments of Appalachian streams based on predictive models for fish, macroinvertebrate, and diatom assemblages: Journal of the North American Benthological Society, v. 27, no. 1, p. 16-37, https://doi.org/10.1899/06-081.1.","startPage":"16","endPage":"37","numberOfPages":"22","costCenters":[],"links":[{"id":212487,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1899/06-081.1"},{"id":239978,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f164e4b0c8380cd4ac2f","contributors":{"authors":[{"text":"Carlisle, D.M.","contributorId":81059,"corporation":false,"usgs":true,"family":"Carlisle","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":433004,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hawkins, C.P.","contributorId":64454,"corporation":false,"usgs":true,"family":"Hawkins","given":"C.P.","email":"","affiliations":[],"preferred":false,"id":433001,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Meador, M. R.","contributorId":74400,"corporation":false,"usgs":true,"family":"Meador","given":"M.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":433002,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Potapova, M.","contributorId":74569,"corporation":false,"usgs":true,"family":"Potapova","given":"M.","affiliations":[],"preferred":false,"id":433003,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Falcone, J.","contributorId":20548,"corporation":false,"usgs":true,"family":"Falcone","given":"J.","email":"","affiliations":[],"preferred":false,"id":433000,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031755,"text":"70031755 - 2008 - Innovations in individual feature history management - The significance of feature-based temporal model","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031755","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1745,"text":"GeoInformatica","active":true,"publicationSubtype":{"id":10}},"title":"Innovations in individual feature history management - The significance of feature-based temporal model","docAbstract":"A feature relies on three dimensions (space, theme, and time) for its representation. Even though spatiotemporal models have been proposed, they have principally focused on the spatial changes of a feature. In this paper, a feature-based temporal model is proposed to represent the changes of both space and theme independently. The proposed model modifies the ISO's temporal schema and adds new explicit temporal relationship structure that stores temporal topological relationship with the ISO's temporal primitives of a feature in order to keep track feature history. The explicit temporal relationship can enhance query performance on feature history by removing topological comparison during query process. Further, a prototype system has been developed to test a proposed feature-based temporal model by querying land parcel history in Athens, Georgia. The result of temporal query on individual feature history shows the efficiency of the explicit temporal relationship structure. ?? Springer Science+Business Media, LLC 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"GeoInformatica","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10707-007-0019-y","issn":"13846175","usgsCitation":"Choi, J., Seong, J., Kim, B., and Usery, E., 2008, Innovations in individual feature history management - The significance of feature-based temporal model: GeoInformatica, v. 12, no. 1, p. 1-20, https://doi.org/10.1007/s10707-007-0019-y.","startPage":"1","endPage":"20","numberOfPages":"20","costCenters":[],"links":[{"id":239911,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212424,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10707-007-0019-y"}],"volume":"12","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-03-27","publicationStatus":"PW","scienceBaseUri":"505a3bfee4b0c8380cd629a5","contributors":{"authors":[{"text":"Choi, J.","contributorId":42741,"corporation":false,"usgs":true,"family":"Choi","given":"J.","email":"","affiliations":[],"preferred":false,"id":432984,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Seong, J.C.","contributorId":104109,"corporation":false,"usgs":true,"family":"Seong","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":432987,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kim, B.","contributorId":93173,"corporation":false,"usgs":true,"family":"Kim","given":"B.","email":"","affiliations":[],"preferred":false,"id":432986,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Usery, E.L.","contributorId":45355,"corporation":false,"usgs":true,"family":"Usery","given":"E.L.","email":"","affiliations":[],"preferred":false,"id":432985,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031753,"text":"70031753 - 2008 - Effect of 3-D viscoelastic structure on post-seismic relaxation from the 2004 M = 9.2 Sumatra earthquake","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031753","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1803,"text":"Geophysical Journal International","active":true,"publicationSubtype":{"id":10}},"title":"Effect of 3-D viscoelastic structure on post-seismic relaxation from the 2004 M = 9.2 Sumatra earthquake","docAbstract":"The 2004 M=9.2 Sumatra-Andaman earthquake profoundly altered the state of stress in a large volume surrounding the ???1400 km long rupture. Induced mantle flow fields and coupled surface deformation are sensitive to the 3-D rheology structure. To predict the post-seismic motions from this earthquake, relaxation of a 3-D spherical viscoelastic earth model is simulated using the theory of coupled normal modes. The quasi-static deformation basis set and solution on the 3-D model is constructed using: a spherically stratified viscoelastic earth model with a linear stress-strain relation; an aspherical perturbation in viscoelastic structure; a 'static'mode basis set consisting of Earth's spheroidal and toroidal free oscillations; a \"viscoelastic\" mode basis set; and interaction kernels that describe the coupling among viscoelastic and static modes. Application to the 2004 Sumatra-Andaman earthquake illustrates the profound modification of the post-seismic flow field at depth by a slab structure and similarly large effects on the near-field post-seismic deformation field at Earth's surface. Comparison with post-seismic GPS observations illustrates the extent to which viscoelastic relaxation contributes to the regional post-seismic deformation. ?? Journal compilation ?? 2008 RAS.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Journal International","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1365-246X.2007.03666.x","issn":"0956540X","usgsCitation":"Pollitz, F., Banerjee, P., Grijalva, K., Nagarajan, B., and Burgmann, R., 2008, Effect of 3-D viscoelastic structure on post-seismic relaxation from the 2004 M = 9.2 Sumatra earthquake: Geophysical Journal International, v. 173, no. 1, p. 189-204, https://doi.org/10.1111/j.1365-246X.2007.03666.x.","startPage":"189","endPage":"204","numberOfPages":"16","costCenters":[],"links":[{"id":487583,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1365-246x.2007.03666.x","text":"Publisher Index Page"},{"id":212400,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-246X.2007.03666.x"},{"id":239878,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"173","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a05b2e4b0c8380cd50ef4","contributors":{"authors":[{"text":"Pollitz, F.","contributorId":66449,"corporation":false,"usgs":true,"family":"Pollitz","given":"F.","affiliations":[],"preferred":false,"id":432977,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Banerjee, P.","contributorId":90525,"corporation":false,"usgs":true,"family":"Banerjee","given":"P.","email":"","affiliations":[],"preferred":false,"id":432980,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Grijalva, K.","contributorId":72204,"corporation":false,"usgs":true,"family":"Grijalva","given":"K.","email":"","affiliations":[],"preferred":false,"id":432978,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nagarajan, B.","contributorId":88151,"corporation":false,"usgs":true,"family":"Nagarajan","given":"B.","email":"","affiliations":[],"preferred":false,"id":432979,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Burgmann, R.","contributorId":10167,"corporation":false,"usgs":true,"family":"Burgmann","given":"R.","affiliations":[],"preferred":false,"id":432976,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031751,"text":"70031751 - 2008 - Use of volatile organic components in scat to identify canid species","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031751","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Use of volatile organic components in scat to identify canid species","docAbstract":"Identification of wildlife species from indirect evidence can be an important part of wildlife management, and conventional +methods can be expensive or have high error rates. We used chemical characterization of the volatile organic constituents (VOCs) in scat as a method to identify 5 species of North American canids from multiple individuals. We sampled vapors of scats in the headspace over a sample using solid-phase microextraction and determined VOC content using gas chromatography with a flame ionization detector. We used linear discriminant analysis to develop models for differentiating species with bootstrapping to estimate accuracy. Our method correcdy classified 82.4% (bootstrapped 95% CI = 68.8-93.8%) of scat samples. Red fox (Vulpes vulpes) scat was most frequendy misclassified (25.0% of scats misclassified); red fox was also the most common destination for misclassified samples. Our findings are the first reported identification of animal species using VOCs in vapor emissions from scat and suggest that identification of wildlife species may be plausible through chemical characterization of vapor emissions of scat.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2007-330","issn":"0022541X","usgsCitation":"Burnham, E., Bender, L.C., Eiceman, G., Pierce, K., and Prasad, S., 2008, Use of volatile organic components in scat to identify canid species: Journal of Wildlife Management, v. 72, no. 3, p. 792-797, https://doi.org/10.2193/2007-330.","startPage":"792","endPage":"797","numberOfPages":"6","costCenters":[],"links":[{"id":212398,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2007-330"},{"id":239876,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"72","issue":"3","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505bbfaee4b08c986b329ce5","contributors":{"authors":[{"text":"Burnham, E.","contributorId":61648,"corporation":false,"usgs":true,"family":"Burnham","given":"E.","email":"","affiliations":[],"preferred":false,"id":432969,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bender, Louis C.","contributorId":72509,"corporation":false,"usgs":true,"family":"Bender","given":"Louis","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":432970,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Eiceman, G.A.","contributorId":90113,"corporation":false,"usgs":true,"family":"Eiceman","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":432971,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pierce, K.M.","contributorId":94101,"corporation":false,"usgs":true,"family":"Pierce","given":"K.M.","email":"","affiliations":[],"preferred":false,"id":432972,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Prasad, S.","contributorId":35949,"corporation":false,"usgs":true,"family":"Prasad","given":"S.","email":"","affiliations":[],"preferred":false,"id":432968,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031749,"text":"70031749 - 2008 - Advection, dispersion, and filtration of fine particles within emergent vegetation of the Florida Everglades","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031749","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Advection, dispersion, and filtration of fine particles within emergent vegetation of the Florida Everglades","docAbstract":"The movement of particulate matter within wetland surface waters affects nutrient cycling, contaminant mobility, and the evolution of the wetland landscape. Despite the importance of particle transport in influencing wetland form and function, there are few data sets that illuminate, in a quantitative way, the transport behavior of particulate matter within surface waters containing emergent vegetation. We report observations from experiments on the transport of 1 ??m latex microspheres at a wetland field site located in Water Conservation Area 3A of the Florida Everglades. The experiments involved line source injections of particles inside two 4.8-m-long surface water flumes constructed within a transition zone between an Eleocharis slough and Cladium jamaicense ridge and within a Cladium jamaicense ridge. We compared the measurements of particle transport to calculations of two-dimensional advection-dispersion model that accounted for a linear increase in water velocities with elevation above the ground surface. The results of this analysis revealed that particle spreading by longitudinal and vertical dispersion was substantially greater in the ridge than within the transition zone and that particle capture by aquatic vegetation lowered surface water particle concentrations and, at least for the timescale of our experiments, could be represented as an irreversible, first-order kinetics process. We found generally good agreement between our field-based estimates of particle dispersion and water velocity and estimates determined from published theory, suggesting that the advective-dispersive transport of particulate matter within complex wetland environments can be approximated on the basis of measurable properties of the flow and aquatic vegetation. Copyright 2008 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Water Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007WR006290","issn":"00431397","usgsCitation":"Huang, Y., Saiers, J., Harvey, J., Noe, G., and Mylon, S., 2008, Advection, dispersion, and filtration of fine particles within emergent vegetation of the Florida Everglades: Water Resources Research, v. 44, no. 4, https://doi.org/10.1029/2007WR006290.","costCenters":[],"links":[{"id":239840,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212367,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007WR006290"}],"volume":"44","issue":"4","noUsgsAuthors":false,"publicationDate":"2008-04-05","publicationStatus":"PW","scienceBaseUri":"5059e70ae4b0c8380cd477f2","contributors":{"authors":[{"text":"Huang, Y.H.","contributorId":84161,"corporation":false,"usgs":true,"family":"Huang","given":"Y.H.","email":"","affiliations":[],"preferred":false,"id":432959,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Saiers, J.E.","contributorId":61234,"corporation":false,"usgs":true,"family":"Saiers","given":"J.E.","affiliations":[],"preferred":false,"id":432957,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Harvey, J. W. 0000-0002-2654-9873","orcid":"https://orcid.org/0000-0002-2654-9873","contributorId":39725,"corporation":false,"usgs":true,"family":"Harvey","given":"J. W.","affiliations":[],"preferred":false,"id":432956,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Noe, G.B.","contributorId":66464,"corporation":false,"usgs":true,"family":"Noe","given":"G.B.","email":"","affiliations":[],"preferred":false,"id":432958,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mylon, S.","contributorId":22147,"corporation":false,"usgs":true,"family":"Mylon","given":"S.","email":"","affiliations":[],"preferred":false,"id":432955,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031747,"text":"70031747 - 2008 - Hydrography and bottom boundary layer dynamics: Influence on inner shelf sediment mobility, Long Bay, North Carolina","interactions":[],"lastModifiedDate":"2016-11-30T11:06:22","indexId":"70031747","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3443,"text":"Southeastern Geology","active":true,"publicationSubtype":{"id":10}},"title":"Hydrography and bottom boundary layer dynamics: Influence on inner shelf sediment mobility, Long Bay, North Carolina","docAbstract":"This study examined the hydrography and bottom boundary-layer dynamics of two typical storm events affecting coastal North Carolina (NC); a hurricane and the passages of two small consecutive extratropical storms during November 2005. Two upward-looking 1200-kHz Acoustic Doppler Current Profilers (ADCP) were deployed on the inner shelf in northern Long Bay, NC at water depths of less than 15 m. Both instruments profiled the overlying water column in 0.35 in bins beginning at a height of 1.35 in above the bottom (mab). Simultaneous measurements of wind speed and direction, wave and current parameters, and acoustic backscatter were coupled with output from a bottom boundary layer (bbl) model to describe the hydrography and boundary layer conditions during each event. The bbl model also was used to quantify sediment transport in the boundary layer during each storm. Both study sites exhibited similar temporal variations in wave and current magnitude, however, wave heights during the November event were higher than waves associated with the hurricane. Near-bottom mean and subtidal currents, however, were of greater magnitude during the hurricane. Peak depth-integrated suspended sediment transport during the November event exceeded transport associated with the hurricane by 25-70%. Substantial spatial variations in sediment transport existed throughout both events. During both events, along-shelf sediment transport exceeded across-shelf transport and was related to the magnitude and direction of subtidal currents. Given the variations in sediment type across the bay, complex shoreline configuration, and local bathymetry, the sediment transport rates reported here are very site specific. However, the general hydrography associated with the two storms is representative of conditions across northern Long Bay. Since the beaches in the study area undergo frequent renourishment to counter the effects of beach erosion, the results of this study also are relevant to coastal management decision-making. Specifically, these issues include 1) identification of municipalities that should share the cost for renourishment given the likelihood for significant along-shelf sand movement and 2) appropriate timing of sand placement with respect to local climatology and sea-turtle nesting restrictions.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Southeastern Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00383678","usgsCitation":"Davis, L., Leonard, L., and Snedden, G., 2008, Hydrography and bottom boundary layer dynamics: Influence on inner shelf sediment mobility, Long Bay, North Carolina: Southeastern Geology, v. 45, no. 3, p. 97-109.","startPage":"97","endPage":"109","numberOfPages":"13","costCenters":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"links":[{"id":239807,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"North Carolina","volume":"45","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3501e4b0c8380cd5fbcc","contributors":{"authors":[{"text":"Davis, L.A.","contributorId":29639,"corporation":false,"usgs":true,"family":"Davis","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":432951,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Leonard, L.A.","contributorId":22582,"corporation":false,"usgs":true,"family":"Leonard","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":432950,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Snedden, G.A. 0000-0001-7821-3709","orcid":"https://orcid.org/0000-0001-7821-3709","contributorId":37535,"corporation":false,"usgs":true,"family":"Snedden","given":"G.A.","affiliations":[],"preferred":false,"id":432952,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031746,"text":"70031746 - 2008 - Historical and current environmental influences on an endemic great plains fish","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031746","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":737,"text":"American Midland Naturalist","active":true,"publicationSubtype":{"id":10}},"title":"Historical and current environmental influences on an endemic great plains fish","docAbstract":"Native fishes of the Great Plains are at risk of decline due to disturbances to physical habitat caused by changes in land and water use, as well as shifts in species assemblages driven by the invasion of introduced species with the loss of natives. We used historical and current fish assemblage data in conjunction with current habitat information to assess these influences on an endemic Great Plains stream fish, the plains topminnow (Fundulus sciadicus). Of the 31 sites where the plains topminnow occurred historically (1939-1940), it was found in only seven of those sites in 2003-2005. Our results demonstrate a shift in fish assemblage over time that coincides with the loss of plains topminnow. Changes in fish assemblages were characterized by increases in occurrence of exotic, invasive and generalist species with declines in occurrences of native fishes. An information theoretic approach was used to evaluate candidate models of current fish assemblage and physical/chemical habitat on the presence of the plains topminnow. Candidate models that included both instream habitat (e.g., vegetation coverage, undercut banks) and the native fish species assemblage are important to predicting presence of the plains topminnow within its historic range. Conservation of Great Plains fishes including the plains topminnow will need a combination of habitat protection and enhancement.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Midland Naturalist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1674/0003-0031(2008)159[364:HACEIO]2.0.CO;2","issn":"00030031","usgsCitation":"Fischer, J.R., and Paukert, C., 2008, Historical and current environmental influences on an endemic great plains fish: American Midland Naturalist, v. 159, no. 2, p. 364-377, https://doi.org/10.1674/0003-0031(2008)159[364:HACEIO]2.0.CO;2.","startPage":"364","endPage":"377","numberOfPages":"14","costCenters":[],"links":[{"id":212310,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1674/0003-0031(2008)159[364:HACEIO]2.0.CO;2"},{"id":239776,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"159","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a317ae4b0c8380cd5df5c","contributors":{"authors":[{"text":"Fischer, John R.","contributorId":100326,"corporation":false,"usgs":true,"family":"Fischer","given":"John","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":432949,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Paukert, C.P.","contributorId":10151,"corporation":false,"usgs":true,"family":"Paukert","given":"C.P.","email":"","affiliations":[],"preferred":false,"id":432948,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031824,"text":"70031824 - 2008 - Preliminary radiometric calibration assessment of ALOS AVNIR-2","interactions":[],"lastModifiedDate":"2022-05-18T14:47:36.475321","indexId":"70031824","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Preliminary radiometric calibration assessment of ALOS AVNIR-2","docAbstract":"<p>This paper summarizes the activities carried out in the frame of the data quality activities of the Advanced Visible and Near Infrared Radiometer type 2 (AVNIR-2) sensor onboard the Advanced Land Observing Satellite (ALOS). Assessment of the radiometric calibration of the AVNIR-2 multi-spectral imager is achieved via three intercomparisons to currently flying sensors over the Libyan desert, during the first year of operation. All three methodologies indicate a slight underestimation of AVNIR-2 in band 1 by 4 to 7 % with respect to other sensors radiometric scale. Band 2 does not show any obvious bias. Results for band 3 are affected by saturation due to inappropriate gain setting. Two methodologies indicate no significant bias in band 4. Preliminary results indicate possible degradations of the AVNIR-2 channels, which, when modeled as an exponentially decreasing functions, have time constants of respectively 13.2 %.year<span>&nbsp;</span><sup>-1</sup><span>&nbsp;</span>, 8.8 %.year<span>&nbsp;</span><sup>-1</sup><span>&nbsp;</span>and 0.1 %.year<span>&nbsp;</span><sup>-1</sup><span>&nbsp;</span>in band 1, 2 and 4 (with respect to the radiometric scale of the MEdium Resolution Imaging Spectrometer, MERIS). Longer time series of AVNIR-2 data are needed to draw final conclusions.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"International Geoscience and Remote Sensing Symposium (IGARSS)","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007","conferenceDate":"Jun 23-28, 2007","conferenceLocation":"Barcelona, Spain","language":"English","doi":"10.1109/IGARSS.2007.4423393","usgsCitation":"Bouvet, M., Goryl, P., Chander, G., Santer, R., and Saunier, S., 2008, Preliminary radiometric calibration assessment of ALOS AVNIR-2, <i>in</i> International Geoscience and Remote Sensing Symposium (IGARSS), Barcelona, Spain, Jun 23-28, 2007, p. 2673-2676, https://doi.org/10.1109/IGARSS.2007.4423393.","productDescription":"4 p.","startPage":"2673","endPage":"2676","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":242620,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8962e4b0c8380cd7de46","contributors":{"authors":[{"text":"Bouvet, M.","contributorId":25375,"corporation":false,"usgs":true,"family":"Bouvet","given":"M.","email":"","affiliations":[],"preferred":false,"id":433295,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Goryl, P.","contributorId":58484,"corporation":false,"usgs":true,"family":"Goryl","given":"P.","email":"","affiliations":[],"preferred":false,"id":433297,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chander, G.","contributorId":51449,"corporation":false,"usgs":true,"family":"Chander","given":"G.","affiliations":[],"preferred":false,"id":433296,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Santer, R.","contributorId":9884,"corporation":false,"usgs":true,"family":"Santer","given":"R.","email":"","affiliations":[],"preferred":false,"id":433294,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Saunier, S.","contributorId":96914,"corporation":false,"usgs":true,"family":"Saunier","given":"S.","email":"","affiliations":[],"preferred":false,"id":433298,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031822,"text":"70031822 - 2008 - Six years of land subsidence in shanghai revealed by JERS-1 SAR data","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031822","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Six years of land subsidence in shanghai revealed by JERS-1 SAR data","docAbstract":"Differential interferometric synthetic aperture radar (SAR) (DInSAR) has proven to be very useful in mapping and monitoring land subsidence in many regions of the world. Shanghai, China's largest city, is one of such areas suffering from land subsidence as a result of severe withdrawal of groundwater for different usages. DInSAR application in Shanghai with the C-band European Remote Sensing 1 & 2 (ERS-1/2) SAR data has been difficult mainly due to the problem of decorrelation of InSAR pairs with temporal baselines larger than 10 months. To overcome the coherence loss of C-band InSAR data, we used eight L-band Japanese Earth Resource Satellite (JERS-1) SAR data acquired during 2 October 1992 to 15 July 1998 to study land subsidence phenomenon in Shanghai. Three of the images were used to produce two separate digital elevation models (DEMs) of the study area to remove topographic fringes from the interferograms used for subsidence mapping. Six interferograms were used to generate 2 different time series of deformation maps over Shanghai. The cumulative subsidence map generated from each of the time series is in agreement with the land subsidence measurements of Shanghai city from 1990-1998, produced from other survey methods. ?? 2007 IEEE.","largerWorkTitle":"International Geoscience and Remote Sensing Symposium (IGARSS)","conferenceTitle":"2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007","conferenceDate":"23 June 2007 through 28 June 2007","conferenceLocation":"Barcelona","language":"English","doi":"10.1109/IGARSS.2007.4423246","isbn":"1424412129; 9781424412129","usgsCitation":"Damoah-Afari, P., Ding, X., Li, Z., Lu, Z., and Omura, M., 2008, Six years of land subsidence in shanghai revealed by JERS-1 SAR data, <i>in</i> International Geoscience and Remote Sensing Symposium (IGARSS), Barcelona, 23 June 2007 through 28 June 2007, p. 2093-2097, https://doi.org/10.1109/IGARSS.2007.4423246.","startPage":"2093","endPage":"2097","numberOfPages":"5","costCenters":[],"links":[{"id":214862,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1109/IGARSS.2007.4423246"},{"id":242618,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9107e4b08c986b319731","contributors":{"authors":[{"text":"Damoah-Afari, P.","contributorId":55228,"corporation":false,"usgs":true,"family":"Damoah-Afari","given":"P.","email":"","affiliations":[],"preferred":false,"id":433288,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ding, X.-L.","contributorId":33934,"corporation":false,"usgs":true,"family":"Ding","given":"X.-L.","email":"","affiliations":[],"preferred":false,"id":433286,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Li, Z.","contributorId":29160,"corporation":false,"usgs":true,"family":"Li","given":"Z.","affiliations":[],"preferred":false,"id":433285,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lu, Z.","contributorId":106241,"corporation":false,"usgs":true,"family":"Lu","given":"Z.","affiliations":[],"preferred":false,"id":433289,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Omura, M.","contributorId":43994,"corporation":false,"usgs":true,"family":"Omura","given":"M.","email":"","affiliations":[],"preferred":false,"id":433287,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031817,"text":"70031817 - 2008 - Effects of topography and crustal heterogeneities on the source estimation of LP event at Kilauea volcano","interactions":[],"lastModifiedDate":"2019-03-07T09:15:07","indexId":"70031817","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1803,"text":"Geophysical Journal International","active":true,"publicationSubtype":{"id":10}},"title":"Effects of topography and crustal heterogeneities on the source estimation of LP event at Kilauea volcano","docAbstract":"<p><span>The main goal of this study is to improve the modelling of the source mechanism associated with the generation of long period (LP) signals in volcanic areas. Our intent is to evaluate the effects that detailed structural features of the volcanic models play in the generation of LP signal and the consequent retrieval of LP source characteristics. In particular, effects associated with the presence of topography and crustal heterogeneities are here studied in detail. We focus our study on a LP event observed at Kilauea volcano, Hawaii, in 2001 May. A detailed analysis of this event and its source modelling is accompanied by a set of synthetic tests, which aim to evaluate the effects of topography and the presence of low velocity shallow layers in the source region. The forward problem of Green's function generation is solved numerically following a pseudo-spectral approach, assuming different 3-D models. The inversion is done in the frequency domain and the resulting source mechanism is represented by the sum of two time-dependent terms: a full moment tensor and a single force. Synthetic tests show how characteristic velocity structures, associated with shallow sources, may be partially responsible for the generation of the observed long-lasting ringing waveforms. When applying the inversion technique to Kilauea LP data set, inversions carried out for different crustal models led to very similar source geometries, indicating a subhorizontal cracks. On the other hand, the source time function and its duration are significantly different for different models. These results support the indication of a strong influence of crustal layering on the generation of the LP signal, while the assumption of homogeneous velocity model may bring to misleading results.</span></p>","language":"English","publisher":"Oxford Academic","doi":"10.1111/j.1365-246X.2007.03695.x","issn":"0956540X","usgsCitation":"Cesca, S., Battaglia, J., Dahm, T., Tessmer, E., Heimann, S., and Okubo, P.G., 2008, Effects of topography and crustal heterogeneities on the source estimation of LP event at Kilauea volcano: Geophysical Journal International, v. 172, no. 3, p. 1219-1236, https://doi.org/10.1111/j.1365-246X.2007.03695.x.","productDescription":"18 p.","startPage":"1219","endPage":"1236","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":476812,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hal.science/hal-00339198","text":"External Repository"},{"id":242550,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214799,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-246X.2007.03695.x"}],"volume":"172","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a080fe4b0c8380cd5195e","contributors":{"authors":[{"text":"Cesca, S.","contributorId":74977,"corporation":false,"usgs":true,"family":"Cesca","given":"S.","email":"","affiliations":[],"preferred":false,"id":433265,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Battaglia, J.","contributorId":31947,"corporation":false,"usgs":true,"family":"Battaglia","given":"J.","email":"","affiliations":[],"preferred":false,"id":433263,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dahm, T.","contributorId":82547,"corporation":false,"usgs":true,"family":"Dahm","given":"T.","email":"","affiliations":[],"preferred":false,"id":433266,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tessmer, E.","contributorId":92070,"corporation":false,"usgs":true,"family":"Tessmer","given":"E.","email":"","affiliations":[],"preferred":false,"id":433267,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Heimann, S.","contributorId":92071,"corporation":false,"usgs":true,"family":"Heimann","given":"S.","email":"","affiliations":[],"preferred":false,"id":433268,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Okubo, Paul G. 0000-0002-0381-6051 pokubo@usgs.gov","orcid":"https://orcid.org/0000-0002-0381-6051","contributorId":2730,"corporation":false,"usgs":true,"family":"Okubo","given":"Paul","email":"pokubo@usgs.gov","middleInitial":"G.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":false,"id":433264,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031737,"text":"70031737 - 2008 - Population structure and genetic diversity of black redhorse (Moxostoma duquesnei) in a highly fragmented watershed","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70031737","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1324,"text":"Conservation Genetics","active":true,"publicationSubtype":{"id":10}},"title":"Population structure and genetic diversity of black redhorse (Moxostoma duquesnei) in a highly fragmented watershed","docAbstract":"Dams have the potential to affect population size and connectivity, reduce genetic diversity, and increase genetic differences among isolated riverine fish populations. Previous research has reported adverse effects on the distribution and demographics of black redhorse (Moxostoma duquesnei), a threatened fish species in Canada. However, effects on genetic diversity and population structure are unknown. We used microsatellite DNA markers to assess the number of genetic populations in the Grand River (Ontario) and to test whether dams have resulted in a loss of genetic diversity and increased genetic differentiation among populations. Three hundred and seventy-seven individuals from eight Grand River sites were genotyped at eight microsatellite loci. Measures of genetic diversity were moderately high and not significantly different among populations; strong evidence of recent population bottlenecks was not detected. Pairwise FST and exact tests identified weak (global FST = 0.011) but statistically significant population structure, although little population structuring was detected using either genetic distances or an individual-based clustering method. Neither geographic distance nor the number of intervening dams were correlated with pairwise differences among populations. Tests for regional equilibrium indicate that Grand River populations were either in equilibrium between gene flow and genetic drift or that gene flow is more influential than drift. While studies on other species have identified strong dam-related effects on genetic diversity and population structure, this study suggests that barrier permeability, river fragment length and the ecological characteristics of affected species can counterbalance dam-related effects. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Conservation Genetics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10592-007-9367-2","issn":"15660621","usgsCitation":"Reid, S., Wilson, C., Mandrak, N., and Carl, L., 2008, Population structure and genetic diversity of black redhorse (Moxostoma duquesnei) in a highly fragmented watershed: Conservation Genetics, v. 9, no. 3, p. 531-546, https://doi.org/10.1007/s10592-007-9367-2.","startPage":"531","endPage":"546","numberOfPages":"16","costCenters":[],"links":[{"id":240154,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212638,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10592-007-9367-2"}],"volume":"9","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-07-07","publicationStatus":"PW","scienceBaseUri":"505a7d97e4b0c8380cd7a03b","contributors":{"authors":[{"text":"Reid, S.M.","contributorId":61550,"corporation":false,"usgs":true,"family":"Reid","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":432916,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, C.C.","contributorId":102987,"corporation":false,"usgs":true,"family":"Wilson","given":"C.C.","email":"","affiliations":[],"preferred":false,"id":432918,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mandrak, N.E.","contributorId":79301,"corporation":false,"usgs":true,"family":"Mandrak","given":"N.E.","affiliations":[],"preferred":false,"id":432917,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Carl, L.M.","contributorId":22478,"corporation":false,"usgs":true,"family":"Carl","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":432915,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031814,"text":"70031814 - 2008 - New estimates of lethality of sea lamprey (Petromyzon marinus) attacks on lake trout (Salvelinus namaycush): Implications for fisheries management","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031814","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1169,"text":"Canadian Journal of Fisheries and Aquatic Sciences","active":true,"publicationSubtype":{"id":10}},"title":"New estimates of lethality of sea lamprey (Petromyzon marinus) attacks on lake trout (Salvelinus namaycush): Implications for fisheries management","docAbstract":"Sea lamprey (Petromyzon marinus) control in North America costs millions of dollars each year, and control measures are guided by assessment of lamprey-induced damage to fisheries. The favored prey of sea lamprey in freshwater ecosystems has been lake trout (Salvelinus namaycush). A key parameter in assessing sea lamprey damage, as well as managing lake trout fisheries, is the probability of an adult lake trout surviving a lamprey attack. The conventional value for this parameter has been 0.55, based on laboratory experiments. In contrast, based on catch curve analysis, mark-recapture techniques, and observed wounding rates, we estimated that adult lake trout in Lake Champlain have a 0.74 probability of surviving a lamprey attack. Although sea lamprey growth in Lake Champlain was lower than that observed in Lake Huron, application of an individual-based model to both lakes indicated that the probability of surviving an attack in Lake Champlain was only 1.1 times higher than that in Lake Huron. Thus, we estimated that lake trout survive a lamprey attack in Lake Huron with a probability of 0.66. Therefore, our results suggested that lethality of a sea lamprey attack on lake trout has been overestimated in previous model applications used in fisheries management. ?? 2008 NRC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Canadian Journal of Fisheries and Aquatic Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1139/F07-187","issn":"0706652X","usgsCitation":"Madenjian, C., Chipman, B., and Marsden, J., 2008, New estimates of lethality of sea lamprey (Petromyzon marinus) attacks on lake trout (Salvelinus namaycush): Implications for fisheries management: Canadian Journal of Fisheries and Aquatic Sciences, v. 65, no. 3, p. 535-542, https://doi.org/10.1139/F07-187.","startPage":"535","endPage":"542","numberOfPages":"8","costCenters":[],"links":[{"id":214766,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1139/F07-187"},{"id":242516,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"65","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6575e4b0c8380cd72bd0","contributors":{"authors":[{"text":"Madenjian, C.P.","contributorId":64175,"corporation":false,"usgs":true,"family":"Madenjian","given":"C.P.","affiliations":[],"preferred":false,"id":433252,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chipman, B.D.","contributorId":27688,"corporation":false,"usgs":true,"family":"Chipman","given":"B.D.","email":"","affiliations":[],"preferred":false,"id":433251,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marsden, J.E.","contributorId":97454,"corporation":false,"usgs":true,"family":"Marsden","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":433253,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031731,"text":"70031731 - 2008 - A 1000-year sediment record of recurring hypoxia off the Mississippi River: The potential role of terrestrially-derived organic matter inputs","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031731","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2662,"text":"Marine Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"A 1000-year sediment record of recurring hypoxia off the Mississippi River: The potential role of terrestrially-derived organic matter inputs","docAbstract":"A suite of inorganic and organic geochemical tracers and a low-oxygen tolerant benthic faunal index ('PEB') were measured in a 14C-dated 2+??m long gravity core collected on the Louisiana shelf adjacent to the Mississippi River delta to study potential millennium-scale low-oxygen events. Periodic down-core excursions in the PEB index throughout the core suggest recurring, natural bottom water low-oxygen events that extend back ??? 1000??14C years. Select trace element and biomarker distributions in these same sediments were examined as potential tracers of past hypoxic events and to help distinguish between marine versus terrestrial processes involved in organic carbon production. In discrete sediment horizons where the PEB index was elevated, redox-sensitive vanadium concentrations were consistently depleted, excursions in sedimentary ??13C suggest periodic, preferential terrestrial inputs, and the concentrations of two sterol biomarkers (sitosterol and ??-stigmasterol) also showed concurrent enrichments. If the PEB index successfully records ??? 1000??14C year-scale low-oxygen events, then the distribution of these geochemical tracers can be interpreted to corroborate the view that naturally occurring low-oxygen bottom water conditions have existed on the inner Louisiana continental shelf, not only in recent times, but also over at least the last 1000??14C years. These data support the general hypothesis that historic, low-oxygen bottom water conditions on the Louisiana shelf are likely tied to periods of increased fluvial discharge and associated wetland export in the absence of modern river levees. Enhanced river discharge and associated material export would both stimulate enhanced in situ organic carbon production and foster water column stratification. Such periodic elevated river flows during the last millennium can be linked to climate fluctuations and tropical storm activity. ?? 2008 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.marchem.2008.01.003","issn":"03044203","usgsCitation":"Swarzenski, P., Campbell, P., Osterman, L., and Poore, R., 2008, A 1000-year sediment record of recurring hypoxia off the Mississippi River: The potential role of terrestrially-derived organic matter inputs: Marine Chemistry, v. 109, no. 1-2, p. 130-142, https://doi.org/10.1016/j.marchem.2008.01.003.","startPage":"130","endPage":"142","numberOfPages":"13","costCenters":[],"links":[{"id":212550,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.marchem.2008.01.003"},{"id":240050,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"109","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e2bee4b0c8380cd45bee","contributors":{"authors":[{"text":"Swarzenski, P.W. 0000-0003-0116-0578","orcid":"https://orcid.org/0000-0003-0116-0578","contributorId":29487,"corporation":false,"usgs":true,"family":"Swarzenski","given":"P.W.","affiliations":[],"preferred":false,"id":432896,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Campbell, P.L.","contributorId":86974,"corporation":false,"usgs":true,"family":"Campbell","given":"P.L.","email":"","affiliations":[],"preferred":false,"id":432899,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Osterman, L.E.","contributorId":53836,"corporation":false,"usgs":true,"family":"Osterman","given":"L.E.","email":"","affiliations":[],"preferred":false,"id":432898,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Poore, R.Z.","contributorId":35314,"corporation":false,"usgs":true,"family":"Poore","given":"R.Z.","email":"","affiliations":[],"preferred":false,"id":432897,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031811,"text":"70031811 - 2008 - Congruent population structure inferred from dispersal behaviour and intensive genetic surveys of the threatened Florida scrub-jay (<i>Aphelocoma cœrulescens</i>)","interactions":[],"lastModifiedDate":"2015-04-01T11:51:53","indexId":"70031811","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2774,"text":"Molecular Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Congruent population structure inferred from dispersal behaviour and intensive genetic surveys of the threatened Florida scrub-jay (<i>Aphelocoma cœrulescens</i>)","docAbstract":"<p>The delimitation of populations, defined as groups of individuals linked by gene flow, is possible by the analysis of genetic markers and also by spatial models based on dispersal probabilities across a landscape. We combined these two complimentary methods to define the spatial pattern of genetic structure among remaining populations of the threatened Florida scrub-jay, a species for which dispersal ability is unusually well-characterized. The range-wide population was intensively censused in the 1990s, and a metapopulation model defined population boundaries based on predicted dispersal-mediated demographic connectivity. We subjected genotypes from more than 1000 individual jays screened at 20 microsatellite loci to two Bayesian clustering methods. We describe a consensus method for identifying common features across many replicated clustering runs. Ten genetically differentiated groups exist across the present-day range of the Florida scrub-jay. These groups are largely consistent with the dispersal-defined metapopulations, which assume very limited dispersal ability. Some genetic groups comprise more than one metapopulation, likely because these genetically similar metapopulations were sundered only recently by habitat alteration. The combined reconstructions of population structure based on genetics and dispersal-mediated demographic connectivity provide a robust depiction of the current genetic and demographic organization of this species, reflecting past and present levels of dispersal among occupied habitat patches. The differentiation of populations into 10 genetic groups adds urgency to management efforts aimed at preserving what remains of genetic variation in this dwindling species, by maintaining viable populations of all genetically differentiated and geographically isolated populations.</p>","language":"English","publisher":"Blackwell Publishing","doi":"10.1111/j.1365-294X.2008.03705.x","issn":"09621083","usgsCitation":"Coulon, A., Fitzpatrick, J., Bowman, R., Stith, B., Makarewich, C., Stenzler, L., and Lovette, I., 2008, Congruent population structure inferred from dispersal behaviour and intensive genetic surveys of the threatened Florida scrub-jay (<i>Aphelocoma cœrulescens</i>): Molecular Ecology, v. 17, no. 7, p. 1685-1701, https://doi.org/10.1111/j.1365-294X.2008.03705.x.","productDescription":"17 p.","startPage":"1685","endPage":"1701","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":239747,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212284,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-294X.2008.03705.x"}],"country":"United States","state":"Florida","volume":"17","issue":"7","noUsgsAuthors":false,"publicationDate":"2008-03-25","publicationStatus":"PW","scienceBaseUri":"5059f9c6e4b0c8380cd4d78d","contributors":{"authors":[{"text":"Coulon, A.","contributorId":20973,"corporation":false,"usgs":true,"family":"Coulon","given":"A.","email":"","affiliations":[],"preferred":false,"id":433231,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fitzpatrick, J.W.","contributorId":33012,"corporation":false,"usgs":true,"family":"Fitzpatrick","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":433232,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bowman, R.","contributorId":12012,"corporation":false,"usgs":true,"family":"Bowman","given":"R.","email":"","affiliations":[],"preferred":false,"id":433229,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stith, B.M.","contributorId":53741,"corporation":false,"usgs":true,"family":"Stith","given":"B.M.","email":"","affiliations":[],"preferred":false,"id":433233,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Makarewich, C.A.","contributorId":66065,"corporation":false,"usgs":true,"family":"Makarewich","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":433234,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Stenzler, L.M.","contributorId":93699,"corporation":false,"usgs":true,"family":"Stenzler","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":433235,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Lovette, I.J.","contributorId":19252,"corporation":false,"usgs":true,"family":"Lovette","given":"I.J.","email":"","affiliations":[],"preferred":false,"id":433230,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70031853,"text":"70031853 - 2008 - Effects of turbulence on hydraulic heads and parameter sensitivities in preferential groundwater flow layers","interactions":[],"lastModifiedDate":"2018-04-03T17:36:52","indexId":"70031853","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Effects of turbulence on hydraulic heads and parameter sensitivities in preferential groundwater flow layers","docAbstract":"<p><span>A conduit flow process (CFP) for the Modular Finite Difference Ground‐Water Flow model, MODFLOW‐2005, has been created by the U.S. Geological Survey. An application of the CFP on a carbonate aquifer in southern Florida is described; this application examines (1) the potential for turbulent groundwater flow and (2) the effects of turbulent flow on hydraulic heads and parameter sensitivities. Turbulent flow components were spatially extensive in preferential groundwater flow layers, with horizontal hydraulic conductivities of about 5,000,000 m d</span><sup>−1</sup><span>, mean void diameters equal to about 3.5 cm, groundwater temperature equal to about 25°C, and critical Reynolds numbers less than or equal to 400. Turbulence either increased or decreased simulated heads from their laminar elevations. Specifically, head differences from laminar elevations ranged from about −18 to +27 cm and were explained by the magnitude of net flow to the finite difference model cell. Turbulence also affected the sensitivities of model parameters. Specifically, the composite‐scaled sensitivities of horizontal hydraulic conductivities decreased by as much as 70% when turbulence was essentially removed. These hydraulic head and sensitivity differences due to turbulent groundwater flow highlight potential errors in models based on the equivalent porous media assumption, which assumes laminar flow in uniformly distributed void spaces.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2007WR006601","usgsCitation":"Shoemaker, W., Cunningham, K.J., Kuniansky, E.L., and Dixon, J.F., 2008, Effects of turbulence on hydraulic heads and parameter sensitivities in preferential groundwater flow layers: Water Resources Research, v. 44, no. 3, Article W03501; 11 p., https://doi.org/10.1029/2007WR006601.","productDescription":"Article W03501; 11 p.","costCenters":[],"links":[{"id":242554,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"44","issue":"3","noUsgsAuthors":false,"publicationDate":"2008-03-29","publicationStatus":"PW","scienceBaseUri":"505a0816e4b0c8380cd51983","contributors":{"authors":[{"text":"Shoemaker, W. Barclay bshoemak@usgs.gov","contributorId":1495,"corporation":false,"usgs":true,"family":"Shoemaker","given":"W. Barclay","email":"bshoemak@usgs.gov","affiliations":[{"id":269,"text":"FLWSC-Ft. Lauderdale","active":true,"usgs":true},{"id":156,"text":"Caribbean Water Science Center","active":true,"usgs":true}],"preferred":true,"id":433445,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cunningham, Kevin J. 0000-0002-2179-8686 kcunning@usgs.gov","orcid":"https://orcid.org/0000-0002-2179-8686","contributorId":1689,"corporation":false,"usgs":true,"family":"Cunningham","given":"Kevin","email":"kcunning@usgs.gov","middleInitial":"J.","affiliations":[{"id":269,"text":"FLWSC-Ft. Lauderdale","active":true,"usgs":true}],"preferred":true,"id":433444,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kuniansky, Eve L. 0000-0002-5581-0225 elkunian@usgs.gov","orcid":"https://orcid.org/0000-0002-5581-0225","contributorId":932,"corporation":false,"usgs":true,"family":"Kuniansky","given":"Eve","email":"elkunian@usgs.gov","middleInitial":"L.","affiliations":[{"id":5064,"text":"Southeast Regional Director's Office","active":true,"usgs":true},{"id":509,"text":"Office of the Associate Director for Water","active":true,"usgs":true}],"preferred":true,"id":433446,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dixon, Joann F. 0000-0001-9200-6407 jdixon@usgs.gov","orcid":"https://orcid.org/0000-0001-9200-6407","contributorId":1756,"corporation":false,"usgs":true,"family":"Dixon","given":"Joann","email":"jdixon@usgs.gov","middleInitial":"F.","affiliations":[{"id":269,"text":"FLWSC-Ft. Lauderdale","active":true,"usgs":true},{"id":27821,"text":"Caribbean-Florida Water Science Center","active":true,"usgs":true},{"id":5051,"text":"FLWSC-Orlando","active":true,"usgs":true}],"preferred":true,"id":433447,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031810,"text":"70031810 - 2008 - Lake Erie Yellow perch age estimation based on three structures: Precision, processing times, and management implications","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031810","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Lake Erie Yellow perch age estimation based on three structures: Precision, processing times, and management implications","docAbstract":"Yellow perch Perca flavescens support economically important recreational and commercial fisheries in Lake Erie and are intensively managed. Age estimation represents an integral component in the management of Lake Erie yellow perch stocks, as age-structured population models are used to set safe harvest levels on an annual basis. We compared the precision associated with yellow perch (N = 251) age estimates from scales, sagittal otoliths, and anal spine sections and evaluated the time required to process and estimate age from each structure. Three readers of varying experience estimated ages. The precision (mean coefficient of variation) of estimates among readers was 1% for sagittal otoliths, 5-6% for anal spines, and 11-13% for scales. Agreement rates among readers were 94-95% for otoliths, 71-76% for anal spines, and 45-50% for scales. Systematic age estimation differences were evident among scale and anal spine readers; less-experienced readers tended to underestimate ages of yellow perch older than age 4 relative to estimates made by an experienced reader. Mean scale age tended to underestimate ages of age-6 and older fish relative to otolith ages estimated by an experienced reader. Total annual mortality estimates based on scale ages were 20% higher than those based on otolith ages; mortality estimates based on anal spine ages were 4% higher than those based on otolith ages. Otoliths required more removal and preparation time than scales and anal spines, but age estimation time was substantially lower for otoliths than for the other two structures. We suggest the use of otoliths or anal spines for age estimation in yellow perch (regardless of length) from Lake Erie and other systems where precise age estimates are necessary, because age estimation errors resulting from the use of scales could generate incorrect management decisions. ?? Copyright by the American Fisheries Society 2008.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"North American Journal of Fisheries Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/M07-064.1","issn":"02755947","usgsCitation":"Vandergoot, C., Bur, M., and Powell, K., 2008, Lake Erie Yellow perch age estimation based on three structures: Precision, processing times, and management implications: North American Journal of Fisheries Management, v. 28, no. 2, p. 563-571, https://doi.org/10.1577/M07-064.1.","startPage":"563","endPage":"571","numberOfPages":"9","costCenters":[],"links":[{"id":239746,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212283,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/M07-064.1"}],"volume":"28","issue":"2","noUsgsAuthors":false,"publicationDate":"2008-02-01","publicationStatus":"PW","scienceBaseUri":"505a4144e4b0c8380cd65421","contributors":{"authors":[{"text":"Vandergoot, C.S.","contributorId":77080,"corporation":false,"usgs":true,"family":"Vandergoot","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":433228,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bur, M.T.","contributorId":58215,"corporation":false,"usgs":true,"family":"Bur","given":"M.T.","email":"","affiliations":[],"preferred":false,"id":433227,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Powell, K.A.","contributorId":30017,"corporation":false,"usgs":true,"family":"Powell","given":"K.A.","email":"","affiliations":[],"preferred":false,"id":433226,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030704,"text":"70030704 - 2008 - Families of miocene monterey crude oil, seep, and tarball samples, coastal California","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030704","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Families of miocene monterey crude oil, seep, and tarball samples, coastal California","docAbstract":"Biomarker and stable carbon isotope ratios were used to infer the age, lithology, organic matter input, and depositional environment of the source rocks for 388 samples of produced crude oil, seep oil, and tarballs to better assess their origins and distributions in coastal California. These samples were used to construct a chemometric (multivariate statistical) decision tree to classify 288 additional samples. The results identify three tribes of 13C-rich oil samples inferred to originate from thermally mature equivalents of the clayey-siliceous, carbonaceous marl and lower calcareous-siliceous members of the Monterey Formation at Naples Beach near Santa Barbara. An attempt to correlate these families to rock extracts from these members in the nearby COST (continental offshore stratigraphic test) (OCS-Cal 78-164) well failed, at least in part because the rocks are thermally immature. Geochemical similarities among the oil tribes and their widespread distribution support the prograding margin model or the banktop-slope-basin model instead of the ridge-and-basin model for the deposition of the Monterey Formation. Tribe 1 contains four oil families having geochemical traits of clay-rich marine shale source rock deposited under suboxic conditions with substantial higher plant input. Tribe 2 contains four oil families with traits intermediate between tribes 1 and 3, except for abundant 28,30-bisnorhopane, indicating suboxic to anoxic marine marl source rock with hemipelagic input. Tribe 3 contains five oil families with traits of distal marine carbonate source rock deposited under anoxic conditions with pelagic but little or no higher plant input. Tribes 1 and 2 occur mainly south of Point Conception in paleogeographic settings where deep burial of the Monterey source rock favored petroleum generation from all three members or their equivalents. In this area, oil from the clayey-siliceous and carbonaceous marl members (tribes 1 and 2) may overwhelm that from the lower calcareous-siliceous member (tribe 3) because the latter is thinner and less oil-prone than the overlying members. Tribe 3 occurs mainly north of Point Conception where shallow burial caused preferential generation from the underlying lower calcareous-siliceous member or another unit with similar characteristics. In a test of the decision tree, 10 tarball samples collected from beaches in Monterey and San Mateo counties in early 2007 were found to originate from natural seeps representing different organofacies of Monterey Formation source rock instead from one anthropogenic pollution event. The seeps apparently became more active because of increased storm activity. Copyright ?? 2008. The American Association of Petroleum Geologists. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Association of Petroleum Geologists Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/04180807113","issn":"01491","usgsCitation":"Peters, K.E., Hostettler, F., Lorenson, T., and Rosenbauer, R., 2008, Families of miocene monterey crude oil, seep, and tarball samples, coastal California: American Association of Petroleum Geologists Bulletin, v. 92, no. 9, p. 1131-1152, https://doi.org/10.1306/04180807113.","startPage":"1131","endPage":"1152","numberOfPages":"22","costCenters":[],"links":[{"id":239288,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211909,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/04180807113"}],"volume":"92","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0ef5e4b0c8380cd536c5","contributors":{"authors":[{"text":"Peters, K. E.","contributorId":17295,"corporation":false,"usgs":true,"family":"Peters","given":"K.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":428276,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hostettler, F. D.","contributorId":99563,"corporation":false,"usgs":true,"family":"Hostettler","given":"F. D.","affiliations":[],"preferred":false,"id":428278,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lorenson, T.D.","contributorId":7715,"corporation":false,"usgs":true,"family":"Lorenson","given":"T.D.","email":"","affiliations":[],"preferred":false,"id":428275,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rosenbauer, R.J.","contributorId":37320,"corporation":false,"usgs":true,"family":"Rosenbauer","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":428277,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033592,"text":"70033592 - 2008 - Dating groundwater with trifluoromethyl sulfurpentafluoride (SF 5CF3), sulfur hexafluoride (SF6), CF 3Cl (CFC-13), and CF2Cl2 (CFC-12)","interactions":[],"lastModifiedDate":"2018-03-21T15:19:45","indexId":"70033592","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Dating groundwater with trifluoromethyl sulfurpentafluoride (SF 5CF3), sulfur hexafluoride (SF6), CF 3Cl (CFC-13), and CF2Cl2 (CFC-12)","docAbstract":"[1] A new groundwater dating procedure using the transient atmospheric signal of the environmental tracers SF5CF3, CFC-13, SF6, and CFC-12 was developed. The analytical procedure determines concentrations of the four tracers in air and water samples. SF 5CF3 and CFC-13 can be used to date groundwaters in some environments where the CFCs and SF6 have previously failed because these new tracers have increasing atmospheric input functions, no known terrigenic source, and are believed to be stable under reducing conditions. SF5CF3 has a dating range from 1970 to modern; the mixing ratio (mole fraction) in North American air has increased from the detection limit of 0.005 parts per trillion (ppt) to the 2006 mole fraction of about 0.16 ppt. No evidence was found for degradation of SF5CF3 in laboratory anaerobic systems. The solubility of SF5CF3 was measured in water from 1 to 35??C. Groundwater samples that contained large amounts of terrigenic SF6 did not contain terrigenic SF 5CF3. CFC-13 is a trace atmospheric gas with a dating range in groundwater of about 1965 to modem. CFC-13 has been used primarily in very low-temperature refrigeration; thus groundwater environments are less likely to be contaminated with nonatmospheric sources as compared to other widely used CFCs. Because of the low solubility of SF5CF3 and CFC-13 in water, an excess air correction must be applied to the apparent ages. The new dating procedure was tested in water samples from wells and springs from Maryland, Virginia, and West Virginia.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Water Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007WR006150","issn":"00431397","usgsCitation":"Busenberg, E., and Plummer, N., 2008, Dating groundwater with trifluoromethyl sulfurpentafluoride (SF 5CF3), sulfur hexafluoride (SF6), CF 3Cl (CFC-13), and CF2Cl2 (CFC-12): Water Resources Research, v. 44, no. 2, https://doi.org/10.1029/2007WR006150.","costCenters":[],"links":[{"id":487125,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007wr006150","text":"Publisher Index Page"},{"id":214101,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007WR006150"},{"id":241791,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"44","issue":"2","noUsgsAuthors":false,"publicationDate":"2008-02-22","publicationStatus":"PW","scienceBaseUri":"5059fde0e4b0c8380cd4e9aa","contributors":{"authors":[{"text":"Busenberg, E.","contributorId":56796,"corporation":false,"usgs":true,"family":"Busenberg","given":"E.","affiliations":[],"preferred":false,"id":441588,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Plummer, Niel 0000-0002-4020-1013 nplummer@usgs.gov","orcid":"https://orcid.org/0000-0002-4020-1013","contributorId":190100,"corporation":false,"usgs":true,"family":"Plummer","given":"Niel","email":"nplummer@usgs.gov","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":441589,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033587,"text":"70033587 - 2008 - Collaboration tools and techniques for large model datasets","interactions":[],"lastModifiedDate":"2017-08-23T12:24:46","indexId":"70033587","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2381,"text":"Journal of Marine Systems","active":true,"publicationSubtype":{"id":10}},"title":"Collaboration tools and techniques for large model datasets","docAbstract":"In MREA and many other marine applications, it is common to have multiple models running with different grids, run by different institutions. Techniques and tools are described for low-bandwidth delivery of data from large multidimensional datasets, such as those from meteorological and oceanographic models, directly into generic analysis and visualization tools. Output is stored using the NetCDF CF Metadata Conventions, and then delivered to collaborators over the web via OPeNDAP. OPeNDAP datasets served by different institutions are then organized via THREDDS catalogs. Tools and procedures are then used which enable scientists to explore data on the original model grids using tools they are familiar with. It is also low-bandwidth, enabling users to extract just the data they require, an important feature for access from ship or remote areas. The entire implementation is simple enough to be handled by modelers working with their webmasters - no advanced programming support is necessary. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Marine Systems","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jmarsys.2007.02.013","issn":"09247963","usgsCitation":"Signell, R.P., Carniel, S., Chiggiato, J., Janekovic, I., Pullen, J., and Sherwood, C.R., 2008, Collaboration tools and techniques for large model datasets: Journal of Marine Systems, v. 69, no. 1-2, p. 154-161, https://doi.org/10.1016/j.jmarsys.2007.02.013.","productDescription":"8 p.","startPage":"154","endPage":"161","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":476753,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/1912/2050","text":"External Repository"},{"id":242220,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"69","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f7abe4b0c8380cd4cc3d","contributors":{"authors":[{"text":"Signell, R. P.","contributorId":89147,"corporation":false,"usgs":true,"family":"Signell","given":"R.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":441567,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carniel, S.","contributorId":47504,"corporation":false,"usgs":true,"family":"Carniel","given":"S.","email":"","affiliations":[],"preferred":false,"id":441564,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chiggiato, J.","contributorId":47065,"corporation":false,"usgs":true,"family":"Chiggiato","given":"J.","affiliations":[],"preferred":false,"id":441563,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Janekovic, I.","contributorId":69796,"corporation":false,"usgs":true,"family":"Janekovic","given":"I.","email":"","affiliations":[],"preferred":false,"id":441566,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Pullen, J.","contributorId":34339,"corporation":false,"usgs":true,"family":"Pullen","given":"J.","email":"","affiliations":[],"preferred":false,"id":441562,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Sherwood, C. R.","contributorId":48235,"corporation":false,"usgs":true,"family":"Sherwood","given":"C.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":441565,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70033585,"text":"70033585 - 2008 - A close look at Saturn's rings with Cassini VIMS","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033585","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"A close look at Saturn's rings with Cassini VIMS","docAbstract":"Soon after the Cassini-Huygens spacecraft entered orbit about Saturn on 1 July 2004, its Visual and Infrared Mapping Spectrometer obtained two continuous spectral scans across the rings, covering the wavelength range 0.35-5.1 ??m, at a spatial resolution of 15-25 km. The first scan covers the outer C and inner B rings, while the second covers the Cassini Division and the entire A ring. Comparisons of the VIMS radial reflectance profile at 1.08 ??m with similar profiles at a wavelength of 0.45 ??m assembled from Voyager images show very little change in ring structure over the intervening 24 years, with the exception of a few features already known to be noncircular. A model for single-scattering by a classical, many-particle-thick slab of material with normal optical depths derived from the Voyager photopolarimeter stellar occultation is found to provide an excellent fit to the observed VIMS reflectance profiles for the C ring and Cassini Division, and an acceptable fit for the inner B ring. The A ring deviates significantly from such a model, consistent with previous suggestions that this region may be closer to a monolayer. An additional complication here is the azimuthally-variable average optical depth associated with \"self-gravity wakes\" in this region and the fact that much of the A ring may be a mixture of almost opaque wakes and relatively transparent interwake zones. Consistently with previous studies, we find that the near-infrared spectra of all main ring regions are dominated by water ice, with a typical regolith grain radius of 5-20 ??m, while the steep decrease in visual reflectance shortward of 0.6 ??m is suggestive of an organic contaminant, perhaps tholin-like. Although no materials other than H2O ice have been identified with any certainty in the VIMS spectra of the rings, significant radial variations are seen in the strength of the water-ice absorption bands. Across the boundary between the C and B rings, over a radial range of ???7000 km, the near-IR band depths strengthen considerably. A very similar pattern is seen across the outer half of the Cassini Division and into the inner A ring, accompanied by a steepening of the red slope in the visible spectrum shortward of 0.55 ??m. We attribute these trends-as well as smaller-scale variations associated with strong density waves in the A ring-to differing grain sizes in the tholin-contaminated icy regolith that covers the surfaces of the decimeter-to-meter sized ring particles. On the largest scale, the spectral variations seen by VIMS suggest that the rings may be divided into two larger 'ring complexes,' with similar internal variations in structure, optical depth, particle size, regolith texture and composition. The inner complex comprises the C and B rings, while the outer comprises the Cassini Division and A ring. ?? 2007 Elsevier Inc. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Icarus","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.icarus.2007.08.036","issn":"00191035","usgsCitation":"Nicholson, P.D., Hedman, M., Clark, R.N., Showalter, M., Cruikshank, D.P., Cuzzi, J., Filacchione, G., Capaccioni, F., Cerroni, P., Hansen, G.B., Sicardy, B., Drossart, P., Brown, R.H., Buratti, B.J., Baines, K.H., and Coradini, A., 2008, A close look at Saturn's rings with Cassini VIMS: Icarus, v. 193, no. 1, p. 182-212, https://doi.org/10.1016/j.icarus.2007.08.036.","startPage":"182","endPage":"212","numberOfPages":"31","costCenters":[],"links":[{"id":214461,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.icarus.2007.08.036"},{"id":242189,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"193","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e345e4b0c8380cd45f17","contributors":{"authors":[{"text":"Nicholson, P. D.","contributorId":54330,"corporation":false,"usgs":false,"family":"Nicholson","given":"P.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":441549,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hedman, M.M.","contributorId":91694,"corporation":false,"usgs":true,"family":"Hedman","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":441553,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clark, R. N.","contributorId":6568,"corporation":false,"usgs":true,"family":"Clark","given":"R.","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":441539,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Showalter, M.R.","contributorId":24992,"corporation":false,"usgs":true,"family":"Showalter","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":441542,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cruikshank, D. P.","contributorId":51434,"corporation":false,"usgs":false,"family":"Cruikshank","given":"D.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":441547,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Cuzzi, J.N.","contributorId":53962,"corporation":false,"usgs":true,"family":"Cuzzi","given":"J.N.","email":"","affiliations":[],"preferred":false,"id":441548,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Filacchione, G.","contributorId":48740,"corporation":false,"usgs":true,"family":"Filacchione","given":"G.","affiliations":[],"preferred":false,"id":441546,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Capaccioni, F.","contributorId":90900,"corporation":false,"usgs":true,"family":"Capaccioni","given":"F.","email":"","affiliations":[],"preferred":false,"id":441552,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Cerroni, P.","contributorId":7869,"corporation":false,"usgs":true,"family":"Cerroni","given":"P.","affiliations":[],"preferred":false,"id":441540,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Hansen, G. B.","contributorId":98478,"corporation":false,"usgs":false,"family":"Hansen","given":"G.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":441554,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Sicardy, B.","contributorId":57622,"corporation":false,"usgs":true,"family":"Sicardy","given":"B.","affiliations":[],"preferred":false,"id":441550,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Drossart, P.","contributorId":29574,"corporation":false,"usgs":true,"family":"Drossart","given":"P.","affiliations":[],"preferred":false,"id":441543,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Brown, R. H.","contributorId":19931,"corporation":false,"usgs":false,"family":"Brown","given":"R.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":441541,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Buratti, B. J.","contributorId":69280,"corporation":false,"usgs":false,"family":"Buratti","given":"B.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":441551,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Baines, K. H.","contributorId":37868,"corporation":false,"usgs":false,"family":"Baines","given":"K.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":441545,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Coradini, A.","contributorId":34679,"corporation":false,"usgs":true,"family":"Coradini","given":"A.","affiliations":[],"preferred":false,"id":441544,"contributorType":{"id":1,"text":"Authors"},"rank":16}]}}
,{"id":70033767,"text":"70033767 - 2008 - Food web dynamics in a seasonally varying wetland","interactions":[],"lastModifiedDate":"2012-03-12T17:21:31","indexId":"70033767","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2699,"text":"Mathematical Biosciences and Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Food web dynamics in a seasonally varying wetland","docAbstract":"A spatially explicit model is developed to simulate the small fish community and its underlying food web, in the freshwater marshes of the Everglades. The community is simplified to a few small fish species feeding on periphyton and invertebrates. Other compartments are detritus, crayfish, and a piscivorous fish species. This unit food web model is applied to each of the 10,000 spatial cells on a 100 x 100 pixel landscape. Seasonal variation in water level is assumed and rules are assigned for fish movement in response to rising and falling water levels, which can cause many spatial cells to alternate between flooded and dry conditions. It is shown that temporal variations of water level on a spatially heterogeneous landscape can maintain at least three competing fish species. In addition, these environmental factors can strongly affect the temporal variation of the food web caused by top-down control from the piscivorous fish.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mathematical Biosciences and Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.3934/mbe.2008.5.877","issn":"15471","usgsCitation":"DeAngelis, D., Trexler, J., and Donalson, D., 2008, Food web dynamics in a seasonally varying wetland: Mathematical Biosciences and Engineering, v. 5, no. 4, p. 877-887, https://doi.org/10.3934/mbe.2008.5.877.","startPage":"877","endPage":"887","numberOfPages":"11","costCenters":[],"links":[{"id":476646,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3934/mbe.2008.5.877","text":"Publisher Index Page"},{"id":214234,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3934/mbe.2008.5.877"},{"id":241934,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a12e6e4b0c8380cd54435","contributors":{"authors":[{"text":"DeAngelis, D.L. 0000-0002-1570-4057","orcid":"https://orcid.org/0000-0002-1570-4057","contributorId":32470,"corporation":false,"usgs":true,"family":"DeAngelis","given":"D.L.","affiliations":[],"preferred":false,"id":442359,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Trexler, J.C.","contributorId":23108,"corporation":false,"usgs":true,"family":"Trexler","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":442358,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Donalson, D.D.","contributorId":69793,"corporation":false,"usgs":true,"family":"Donalson","given":"D.D.","affiliations":[],"preferred":false,"id":442360,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033593,"text":"70033593 - 2008 - Dynamic stresses, Coulomb failure, and remote triggering","interactions":[],"lastModifiedDate":"2019-03-20T08:03:12","indexId":"70033593","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Dynamic stresses, Coulomb failure, and remote triggering","docAbstract":"Dynamic stresses associated with crustal surface waves with 15-30-sec periods and peak amplitudes < 1 MPa are capable of triggering seismicity at sites remote from the generating mainshock under appropriate conditions. Coulomb failure models based on a frictional strength threshold offer one explanation for instances of rapid-onset triggered seismicity that develop during the surface-wave peak dynamic stressing. Evaluation of the triggering potential of surface-wave dynamic stresses acting on critically stressed faults using a Mohr's circle representation together with the Coulomb failure criteria indicates that Love waves should have a higher triggering potential than Rayleigh waves when incident on vertical, strike-slip faults. That (1) the onset of triggered seismicity often appears to begin during the Rayleigh wave rather than the earher-arriving Love wave, (2) vertical strike-slip faults pervade the crust in most tectonic regimes, and (3) Love-wave amplitudes typically exceed those for Rayleigh waves suggests that the explanation for rapid-onset dynamic triggering may not reside solely with a simple static-threshold friction mode. The results also indicate that thrust faults should be more susceptible to dynamic triggering by Rayleigh-wave stresses than normal faults in the shallow seismogenic crust (< 5 km), while the reverse should be true in the lower seismogenic crust (> 5 km). The latter is consistent with the observation that extensional or transtensional tectonic regimes are more susceptible to remote triggering by Rayleigh-wave dynamic stresses than compressional or transpressional regimes. Locally elevated pore pressures may have a role in the observed prevalence of dynamic triggering in extensional regimes and geothermal/volcanic systems.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120070049","issn":"00371106","usgsCitation":"Hill, D.P., 2008, Dynamic stresses, Coulomb failure, and remote triggering: Bulletin of the Seismological Society of America, v. 98, no. 1, p. 66-92, https://doi.org/10.1785/0120070049.","startPage":"66","endPage":"92","numberOfPages":"27","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":241792,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214102,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120070049"}],"volume":"98","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a042be4b0c8380cd50820","contributors":{"authors":[{"text":"Hill, David P. 0000-0002-1619-2006 dhill@usgs.gov","orcid":"https://orcid.org/0000-0002-1619-2006","contributorId":206752,"corporation":false,"usgs":true,"family":"Hill","given":"David","email":"dhill@usgs.gov","middleInitial":"P.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":759551,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70033186,"text":"70033186 - 2008 - Measuring real-time streamflow using emerging technologies: Radar, hydroacoustics, and the probability concept","interactions":[],"lastModifiedDate":"2012-03-12T17:21:36","indexId":"70033186","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Measuring real-time streamflow using emerging technologies: Radar, hydroacoustics, and the probability concept","docAbstract":"Forecasting streamflow during extreme hydrologic events such as floods can be problematic. This is particularly true when flow is unsteady, and river forecasts rely on models that require uniform-flow rating curves to route water from one forecast point to another. As a result, alternative methods for measuring streamflow are needed to properly route flood waves and account for inertial and pressure forces in natural channels dominated by nonuniform-flow conditions such as mild water surface slopes, backwater, tributary inflows, and reservoir operations. The objective of the demonstration was to use emerging technologies to measure instantaneous streamflow in open channels at two existing US Geological Survey streamflow-gaging stations in Pennsylvania. Surface-water and instream-point velocities were measured using hand-held radar and hydroacoustics. Streamflow was computed using the probability concept, which requires velocity data from a single vertical containing the maximum instream velocity. The percent difference in streamflow at the Susquehanna River at Bloomsburg, PA ranged from 0% to 8% with an average difference of 4% and standard deviation of 8.81 m3/s. The percent difference in streamflow at Chartiers Creek at Carnegie, PA ranged from 0% to 11% with an average difference of 5% and standard deviation of 0.28 m3/s. New generation equipment is being tested and developed to advance the use of radar-derived surface-water velocity and instantaneous streamflow to facilitate the collection and transmission of real-time streamflow that can be used to parameterize hydraulic routing models.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2008.03.028","issn":"00221694","usgsCitation":"Fulton, J., and Ostrowski, J., 2008, Measuring real-time streamflow using emerging technologies: Radar, hydroacoustics, and the probability concept: Journal of Hydrology, v. 357, no. 1-2, p. 1-10, https://doi.org/10.1016/j.jhydrol.2008.03.028.","startPage":"1","endPage":"10","numberOfPages":"10","costCenters":[],"links":[{"id":240722,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213129,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2008.03.028"}],"volume":"357","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a534fe4b0c8380cd6c9bb","contributors":{"authors":[{"text":"Fulton, J.","contributorId":9872,"corporation":false,"usgs":true,"family":"Fulton","given":"J.","email":"","affiliations":[],"preferred":false,"id":439740,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ostrowski, J.","contributorId":10925,"corporation":false,"usgs":true,"family":"Ostrowski","given":"J.","email":"","affiliations":[],"preferred":false,"id":439741,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033179,"text":"70033179 - 2008 - Sediment dispersal in the northwestern Adriatic Sea","interactions":[],"lastModifiedDate":"2017-09-19T11:29:12","indexId":"70033179","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2315,"text":"Journal of Geophysical Research C: Oceans","active":true,"publicationSubtype":{"id":10}},"title":"Sediment dispersal in the northwestern Adriatic Sea","docAbstract":"Sediment dispersal in the Adriatic Sea was evaluated using coupled three-dimensional circulation and sediment transport models, representing conditions from autumn 2002 through spring 2003. The calculations accounted for fluvial sources, resuspension by waves and currents, and suspended transport. Sediment fluxes peaked during southwestward Bora wind conditions that produced energetic waves and strengthened the Western Adriatic Coastal Current. Transport along the western Adriatic continental shelf was nearly always to the south, except during brief periods when northward Sirocco winds reduced the coastal current. Much of the modeled fluvial sediment deposition was near river mouths, such as the Po subaqueous delta. Nearly all Po sediment remained in the northern Adriatic. Material from rivers that drain the Apennine Mountains traveled farther before deposition than Po sediment, because it was modeled with a lower settling velocity. Fluvial sediment delivered to areas with high average bed shear stress was more highly dispersed than material delivered to more quiescent areas. Modeled depositional patterns were similar to observed patterns that have developed over longer timescales. Specifically, modeled Po sediment accumulation was thickest near the river mouth with a very thin deposit extending to the northeast, consistent with patterns of modern sediment texture in the northern Adriatic. Sediment resuspended from the bed and delivered by Apennine Rivers was preferentially deposited on the northern side of the Gargano Peninsula, in the location of thick Holocene accumulation. Deposition here was highest during Bora winds when convergences in current velocities and off-shelf flux enhanced delivery of material to the midshelf. Copyright 2008 by the American Geophysical Union.","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006JC003868","issn":"01480","usgsCitation":"Harris, C.K., Sherwood, C.R., Signell, R.P., Bever, A., and Warner, J., 2008, Sediment dispersal in the northwestern Adriatic Sea: Journal of Geophysical Research C: Oceans, v. 113, no. 11, C11S03; 18 p., https://doi.org/10.1029/2006JC003868.","productDescription":"C11S03; 18 p.","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":476654,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jc003868","text":"Publisher Index Page"},{"id":241162,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Adriatic Sea","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              18.47900390625,\n              39.85915479295669\n            ],\n            [\n              19.40185546875,\n              40.413496049701955\n            ],\n            [\n              19.44580078125,\n              41.19518982948959\n            ],\n            [\n              19.62158203125,\n              41.82045509614034\n            ],\n            [\n              18.17138671875,\n              42.5530802889558\n            ],\n            [\n              16.89697265625,\n              43.1811470593997\n            ],\n            [\n              15.1171875,\n              43.78695837311561\n            ],\n            [\n              14.52392578125,\n              44.762336674810996\n            ],\n            [\n              13.7548828125,\n              45.058001435398296\n            ],\n            [\n              13.5791015625,\n              45.47554027158593\n            ],\n            [\n              13.2275390625,\n              45.78284835197676\n            ],\n            [\n              12.32666015625,\n              45.537136680398596\n            ],\n            [\n              12.0849609375,\n              45.259422036351694\n            ],\n            [\n              12.568359375,\n              44.94924926661151\n            ],\n            [\n              12.28271484375,\n              44.574817404670306\n            ],\n            [\n              12.37060546875,\n              44.15068115978094\n            ],\n            [\n              13.5791015625,\n              43.54854811091286\n            ],\n            [\n              14.150390625,\n              42.48830197960227\n            ],\n            [\n              15.18310546875,\n              41.902277040963696\n            ],\n            [\n              16.2158203125,\n              41.95131994679697\n            ],\n            [\n              16.2158203125,\n              41.72213058512578\n            ],\n            [\n              15.908203125,\n              41.49212083968776\n            ],\n            [\n              17.55615234375,\n              40.91351257612758\n            ],\n            [\n              18.30322265625,\n              40.51379915504413\n            ],\n            [\n              18.47900390625,\n              39.85915479295669\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"113","issue":"11","noUsgsAuthors":false,"publicationDate":"2008-10-29","publicationStatus":"PW","scienceBaseUri":"505b8984e4b08c986b316e03","contributors":{"authors":[{"text":"Harris, C. 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