We assessed population genetic subdivision among four colonies of Common Eiders (Somateria mollissima v-nigrum) breeding in the Yukon-Kuskokwim Delta (YKD), Alaska, using microsatellite genotypes and DNA sequences with differing modes of inheritance. Significant, albeit low, levels of genetic differentiation were observed between mainland populations and Kigigak Island for nuclear intron lamin A and mitochondrial DNA (mtDNA) control region. Intercolony variation in haplotypic frequencies also was observed at mtDNA. Positive growth signatures assayed from microsatellites, nuclear introns, and mtDNA indicate recent colonization of the YKD, and may explain the low levels of structuring observed. Gene flow estimates based on microsatellites, nuclear introns, and mtDNA suggest asymmetrical gene flow between mainland colonies and Kigigak Island, with more individuals on average dispersing from mainland populations to Kigigak Island than vice versa. The directionality of gene flow observed may be explained by the colonization of the YKD from northern glacial refugia or by YKD metapopulation dynamics.
","language":"English","publisher":"Cooper Ornithological Society","doi":"10.1650/0010-5422(2007)109[878:GCOCEB]2.0.CO;2","usgsCitation":"Sonsthagen, S.A., Talbot, S.L., and McCracken, K.G., 2007, Genetic characterization of Common Eiders breeding in the Yukon-Kuskokwim Delta, Alaska: The Condor, v. 109, no. 4, p. 878-893, https://doi.org/10.1650/0010-5422(2007)109[878:GCOCEB]2.0.CO;2.","productDescription":"16 p.","startPage":"878","endPage":"893","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"links":[{"id":477224,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1650/0010-5422(2007)109[878:gcoceb]2.0.co;2","text":"Publisher Index Page"},{"id":240676,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Yukon-Kuskokwim Delta","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -166.036376953125,\n 60.68931752009124\n ],\n [\n -164.443359375,\n 60.68931752009124\n ],\n [\n -164.443359375,\n 61.39145881217429\n ],\n [\n -166.036376953125,\n 61.39145881217429\n ],\n [\n -166.036376953125,\n 60.68931752009124\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"109","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1568e4b0c8380cd54dd3","contributors":{"authors":[{"text":"Sonsthagen, Sarah A. 0000-0001-6215-5874 ssonsthagen@usgs.gov","orcid":"https://orcid.org/0000-0001-6215-5874","contributorId":3711,"corporation":false,"usgs":true,"family":"Sonsthagen","given":"Sarah","email":"ssonsthagen@usgs.gov","middleInitial":"A.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":424356,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Talbot, Sandra L. 0000-0002-3312-7214 stalbot@usgs.gov","orcid":"https://orcid.org/0000-0002-3312-7214","contributorId":140512,"corporation":false,"usgs":true,"family":"Talbot","given":"Sandra","email":"stalbot@usgs.gov","middleInitial":"L.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":424355,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McCracken, Kevin G.","contributorId":72309,"corporation":false,"usgs":false,"family":"McCracken","given":"Kevin","email":"","middleInitial":"G.","affiliations":[{"id":6752,"text":"University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":424354,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70042827,"text":"cir13065A - 2007 - Aerial rapid assessment of hurricane damages to northern Gulf coastal habitats","interactions":[],"lastModifiedDate":"2019-06-18T12:08:14","indexId":"cir13065A","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":307,"text":"Circular","code":"CIR","onlineIssn":"2330-5703","printIssn":"1067-084X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1306","chapter":"5A","title":"Aerial rapid assessment of hurricane damages to northern Gulf coastal habitats","docAbstract":"Hurricane Katrina made landfall in southeast Louisiana on August 29, 2005, and Hurricane Rita made landfall in southwest Louisiana on September 24, 2005. Scientists from the U.S. Geological Survey (USGS) flew aerial surveys to assess damages to natural resources and to lands owned and managed by the U.S. Department of the Interior and other agencies. Flights were made on eight dates from August 27 through October 4, including one pre-Katrina, three post-Katrina, and four post-Rita surveys. The geographic area surveyed extended from Galveston, Tex., to Gulf Shores, Ala., and from the Gulf of Mexico shoreline inland 5-75 mi (8-121 km). Impacts to barrier island habitats were severe, especially at the Chandeleur Islands, which were reduced in land area by roughly 50 percent. Marsh impacts varied but were greatest in St. Bernard and Cameron Parishes, where much emergent vegetation was scoured or killed. Forested wetlands were impacted heavily, especially in the Pearl River basin and on the cheniers of southwest Louisiana.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Science and the storms-the USGS response to the hurricanes of 2005 (Circular 1306)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/cir13065A","collaboration":"This report is Chapter 5A in Science and the storms-the USGS response to the hurricanes of 2005. 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We analyzed inter-specific competitive interactions between a large consumer and smaller competitors, whose energetics, selection and giving-up behaviour on identical resource patches scaled with individual body size. The aim was to investigate whether pure metabolic constraints on patch behaviour of vagile species can determine coexistence conditions consistent with existing theoretical and experimental evidence. We used an individual-based spatially explicit simulation model at a spatial scale defined by the home range of the large consumer, which was assumed to be parthenogenic and semelparous. Under exploitative conditions, competitive coexistence occurred in a range of body size ratios between 2 and 10. Asymmetrical competition and the mechanism underlying asymmetry, determined by the scaling of energetics and patch behaviour with consumer body size, were the proximate determinant of inter-specific coexistence. The small consumer exploited patches more efficiently, but searched for profitable patches less effectively than the larger competitor. Therefore, body-size related constraints induced niche partitioning, allowing competitive coexistence within a set of conditions where the large consumer maintained control over the small consumer and resource dynamics. The model summarises and extends the existing evidence of species coexistence on a limiting resource, and provides a mechanistic explanation for decoding the size-abundance distribution patterns commonly observed at guild and community levels. ?? Oikos.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Oikos","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.2007.0030-1299.15702.x","issn":"00301299","usgsCitation":"Basset, A., and Angelis, D., 2007, Body size mediated coexistence of consumers competing for resources in space: Oikos, v. 116, no. 8, p. 1363-1377, https://doi.org/10.1111/j.2007.0030-1299.15702.x.","startPage":"1363","endPage":"1377","numberOfPages":"15","costCenters":[],"links":[{"id":211380,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.2007.0030-1299.15702.x"},{"id":238660,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"116","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f1f7e4b0c8380cd4af1b","contributors":{"authors":[{"text":"Basset, A.","contributorId":39552,"corporation":false,"usgs":true,"family":"Basset","given":"A.","email":"","affiliations":[],"preferred":false,"id":428551,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Angelis, D.L.","contributorId":105525,"corporation":false,"usgs":true,"family":"Angelis","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":428552,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70043131,"text":"cir13068A - 2007 - Current and Future Science Plans for Restoring a Resilient Coast","interactions":[],"lastModifiedDate":"2019-06-18T11:53:25","indexId":"cir13068A","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":307,"text":"Circular","code":"CIR","onlineIssn":"2330-5703","printIssn":"1067-084X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1306","chapter":"8A","title":"Current and Future Science Plans for Restoring a Resilient Coast","docAbstract":"The overarching goal of U.S. Geological Survey (USGS) Gulf Coast science in the aftermath of the 2005 hurricane season will be to provide the scientific information, knowledge, and tools required to ensure that decisions about coastal land resource use, management practices, and future development in the coastal zone and adjacent watersheds promote restoration, increase coastal resilience, and mitigate risks associated with both human-created and natural hazards.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Science and the storms-the USGS response to the hurricanes of 2005 (Circular 1306)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/cir13068A","collaboration":"This report is Chapter 8A in Science and the storms-the USGS response to the hurricanes of 2005. See Circular 1306 for more information and other chapters.","usgsCitation":"U.S. Geological Survey, 2007, Current and Future Science Plans for Restoring a Resilient Coast: U.S. Geological Survey Circular 1306, 6 p., https://doi.org/10.3133/cir13068A.","productDescription":"6 p.","startPage":"265","endPage":"269","numberOfPages":"6","costCenters":[{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true},{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"links":[{"id":267039,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/cir_1306_8a.gif"},{"id":267038,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/circ/1306/pdf/c1306_ch8_a.pdf"},{"id":267036,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/circ/1306/"}],"country":"United States","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"51123828e4b0ebe69d7eb6b9"} ,{"id":70196853,"text":"70196853 - 2007 - The effects of acidic mine drainage from historical mines in the Animas River watershed, San Juan County, Colorado—What is being done and what can be done to improve water quality?","interactions":[],"lastModifiedDate":"2021-05-06T14:54:55.549372","indexId":"70196853","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"The effects of acidic mine drainage from historical mines in the Animas River watershed, San Juan County, Colorado—What is being done and what can be done to improve water quality?","docAbstract":"Historical production of metals in the western United States has left a legacy of acidic drainage and toxic metals in many mountain watersheds that are a potential threat to human and ecosystem health. Studies of the effects of historical mining on surface water chemistry and riparian habitat in the Animas River watershed have shown that cost-effective remediation of mine sites must be carefully planned. of the more than 5400 mine, mill, and prospect sites in the watershed, ∼80 sites account for more than 90% of the metal loads to the surface drainages. Much of the low pH water and some of the metal loads are the result of weathering of hydrothermally altered rock that has not been disturbed by historical mining. Some stream reaches in areas underlain by hydrothermally altered rock contained no aquatic life prior to mining.
Scientific studies of the processes and metal-release pathways are necessary to develop effective remediation strategies, particularly in watersheds where there is little land available to build mine-waste repositories. Characterization of mine waste, development of runoff profiles, and evaluation of ground-water pathways all require rigorous study and are expensive upfront costs that land managers find difficult to justify. Tracer studies of water quality provide a detailed spatial analysis of processes affecting surface- and ground-water chemistry. Reactive transport models were used in conjunction with the best state-of-the-art engineering solutions to make informed and cost-effective remediation decisions.
Remediation of 23% of the high-priority sites identified in the watershed has resulted in steady improvement in water quality. More than $12 million, most contributed by private entities, has been spent on remediation in the Animas River watershed. The recovery curve for aquatic life in the Animas River system will require further documentation and long-term monitoring to evaluate the effectiveness of remediation projects implemented.
","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Understanding and responding to hazardous substances at mine sites in the western United States","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"Geological Society of America","doi":"10.1130/2007.4017(04)","usgsCitation":"Church, S.E., Owen, R.J., Von Guerard, P., Verplanck, P.L., Kimball, B.A., and Yager, D.B., 2007, The effects of acidic mine drainage from historical mines in the Animas River watershed, San Juan County, Colorado—What is being done and what can be done to improve water quality?, chap. of Understanding and responding to hazardous substances at mine sites in the western United States, p. 47-83, https://doi.org/10.1130/2007.4017(04).","productDescription":"37 p.","startPage":"47","endPage":"83","costCenters":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true},{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true},{"id":35995,"text":"Geology, Geophysics, and Geochemistry Science Center","active":true,"usgs":true}],"links":[{"id":353969,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado, Montana","county":"Jefferson County, San Juan County","otherGeospatial":"Animas River watershed, Boulder River watershed","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -112.4066162109375,\n 46.2\n ],\n [\n -111.79412841796875,\n 46.2\n ],\n [\n -111.79412841796875,\n 46.5720787149159\n ],\n [\n -112.4066162109375,\n 46.5720787149159\n ],\n [\n -112.4066162109375,\n 46.2\n ]\n ]\n ]\n }\n },\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -107.875,\n 37.7\n ],\n [\n -107.5,\n 37.7\n ],\n [\n -107.5,\n 38\n ],\n [\n -107.875,\n 38\n ],\n [\n -107.875,\n 37.7\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5afeff77e4b0da30c1bfcb82","contributors":{"authors":[{"text":"Church, Stanley E. schurch@usgs.gov","contributorId":199165,"corporation":false,"usgs":true,"family":"Church","given":"Stanley","email":"schurch@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":true,"id":734732,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Owen, Robert J.","contributorId":204694,"corporation":false,"usgs":false,"family":"Owen","given":"Robert","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":734733,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Von Guerard, Paul","contributorId":40620,"corporation":false,"usgs":true,"family":"Von Guerard","given":"Paul","affiliations":[],"preferred":false,"id":734734,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Verplanck, Philip L. 0000-0002-3653-6419 plv@usgs.gov","orcid":"https://orcid.org/0000-0002-3653-6419","contributorId":728,"corporation":false,"usgs":true,"family":"Verplanck","given":"Philip","email":"plv@usgs.gov","middleInitial":"L.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":734735,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kimball, Briant A. bkimball@usgs.gov","contributorId":533,"corporation":false,"usgs":true,"family":"Kimball","given":"Briant","email":"bkimball@usgs.gov","middleInitial":"A.","affiliations":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"preferred":true,"id":734736,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Yager, Douglas B. 0000-0001-5074-4022 dyager@usgs.gov","orcid":"https://orcid.org/0000-0001-5074-4022","contributorId":798,"corporation":false,"usgs":true,"family":"Yager","given":"Douglas","email":"dyager@usgs.gov","middleInitial":"B.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":734737,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70030763,"text":"70030763 - 2007 - Modeling the movement of a pH perturbation and its impact on adsorbed zinc and phosphate in a wastewater‐contaminated aquifer","interactions":[],"lastModifiedDate":"2023-08-02T11:07:21.55908","indexId":"70030763","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Modeling the movement of a pH perturbation and its impact on adsorbed zinc and phosphate in a wastewater‐contaminated aquifer","docAbstract":"[1] Chemical conditions were perturbed in an aquifer with an ambient pH of 5.9 and wastewater-derived adsorbed zinc (Zn) and phosphate (P) contamination by injecting a pulse of amended groundwater. The injected groundwater had low concentrations of dissolved Zn and P, a pH value of 4.5 resulting from equilibration with carbon dioxide gas, and added potassium bromide (KBr). Downgradient of the injection, breakthrough of nonreactive Br and total dissolved carbonate concentrations in excess of ambient values (excess TCO2) were accompanied by a decrease in pH values and over twentyfold increases in dissolved Zn concentrations above preinjection values. Peak concentrations of Br and excess TCO2 were followed by slow increases in pH values accompanied by significant increases in dissolved P above preinjection concentrations. The injected tracers mobilized a significant mass of wastewater-derived Zn. Reactive transport simulations incorporating surface complexation models for adsorption of Zn, P, hydrogen ions, and major cations onto the aquifer sediments, calibrated using laboratory experimental data, captured most of the important trends observed during the experiment. These include increases in Zn concentrations in response to the pH perturbation, perturbations in major cation concentrations, attenuation of the pH perturbation with transport distance, and increases in alkalinity with transport distance. Observed desorption of P in response to chemical perturbations was not predicted, possibly because of a disparity between the range of chemical conditions in the calibration data set and those encountered during the field experiment. Zinc and P desorbed rapidly in response to changing chemical conditions despite decades of contact with the sediments. Surface complexation models with relatively few parameters in the form of logK values and site concentrations show considerable promise for describing the influence of variable chemistry on the transport of adsorbing contaminants.
Samples of water and sediment from a conventional drinking-water-treatment (DWT) plant were analyzed for 113 organic compounds (OCs) that included pharmaceuticals, detergent degradates, flame retardants and plasticizers, polycyclic aromatic hydrocarbons (PAHs), fragrances and flavorants, pesticides and an insect repellent, and plant and animal steroids. 45 of these compounds were detected in samples of source water and 34 were detected in samples of settled sludge and (or) filter-backwash sediments. The average percent removal of these compounds was calculated from their average concentration in time-composited water samples collected after clarification, disinfection (chlorination), and granular-activated-carbon (GAC) filtration. In general, GAC filtration accounted for 53% of the removal of these compounds from the aqueous phase; disinfection accounted for 32%, and clarification accounted for 15%. The effectiveness of these treatments varied widely within and among classes of compounds; some hydrophobic compounds were strongly oxidized by free chlorine, and some hydrophilic compounds were partly removed through adsorption processes. The detection of 21 of the compounds in 1 or more samples of finished water, and of 3 to 13 compounds in every finished-water sample, indicates substantial but incomplete degradation or removal of OCs through the conventional DWT process used at this plant.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Science of the Total Environment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.scitotenv.2007.01.095","issn":"00489697","usgsCitation":"Stackelberg, P.E., Gibs, J., Furlong, E.T., Meyer, M.T., Zaugg, S.D., and Lippincott, R., 2007, Efficiency of conventional drinking-water-treatment processes in removal of pharmaceuticals and other organic compounds: Science of the Total Environment, v. 377, no. 2-3, p. 255-272, https://doi.org/10.1016/j.scitotenv.2007.01.095.","productDescription":"18 p.","startPage":"255","endPage":"272","numberOfPages":"18","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":239258,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211884,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.scitotenv.2007.01.095"}],"volume":"377","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0866e4b0c8380cd51adb","contributors":{"authors":[{"text":"Stackelberg, Paul E. 0000-0002-1818-355X pestack@usgs.gov","orcid":"https://orcid.org/0000-0002-1818-355X","contributorId":1069,"corporation":false,"usgs":true,"family":"Stackelberg","given":"Paul","email":"pestack@usgs.gov","middleInitial":"E.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":426129,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gibs, Jacob jgibs@usgs.gov","contributorId":1729,"corporation":false,"usgs":true,"family":"Gibs","given":"Jacob","email":"jgibs@usgs.gov","affiliations":[],"preferred":true,"id":426132,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Furlong, Edward T. 0000-0002-7305-4603 efurlong@usgs.gov","orcid":"https://orcid.org/0000-0002-7305-4603","contributorId":740,"corporation":false,"usgs":true,"family":"Furlong","given":"Edward","email":"efurlong@usgs.gov","middleInitial":"T.","affiliations":[{"id":27111,"text":"National Water Quality Program","active":true,"usgs":true},{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":503,"text":"Office of Water Quality","active":true,"usgs":true},{"id":5046,"text":"Branch of Analytical Serv (NWQL)","active":true,"usgs":true}],"preferred":true,"id":426134,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Meyer, Michael T. 0000-0001-6006-7985 mmeyer@usgs.gov","orcid":"https://orcid.org/0000-0001-6006-7985","contributorId":866,"corporation":false,"usgs":true,"family":"Meyer","given":"Michael","email":"mmeyer@usgs.gov","middleInitial":"T.","affiliations":[{"id":353,"text":"Kansas Water Science Center","active":false,"usgs":true}],"preferred":true,"id":426133,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Zaugg, Steven D. sdzaugg@usgs.gov","contributorId":768,"corporation":false,"usgs":true,"family":"Zaugg","given":"Steven","email":"sdzaugg@usgs.gov","middleInitial":"D.","affiliations":[],"preferred":true,"id":426131,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lippincott, R.L.","contributorId":73817,"corporation":false,"usgs":true,"family":"Lippincott","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":426130,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70030209,"text":"70030209 - 2007 - Statistical analysis of water-quality data containing multiple detection limits II: S-language software for nonparametric distribution modeling and hypothesis testing","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030209","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1315,"text":"Computers & Geosciences","printIssn":"0098-3004","active":true,"publicationSubtype":{"id":10}},"title":"Statistical analysis of water-quality data containing multiple detection limits II: S-language software for nonparametric distribution modeling and hypothesis testing","docAbstract":"Analysis of low concentrations of trace contaminants in environmental media often results in left-censored data that are below some limit of analytical precision. Interpretation of values becomes complicated when there are multiple detection limits in the data-perhaps as a result of changing analytical precision over time. Parametric and semi-parametric methods, such as maximum likelihood estimation and robust regression on order statistics, can be employed to model distributions of multiply censored data and provide estimates of summary statistics. However, these methods are based on assumptions about the underlying distribution of data. Nonparametric methods provide an alternative that does not require such assumptions. A standard nonparametric method for estimating summary statistics of multiply-censored data is the Kaplan-Meier (K-M) method. This method has seen widespread usage in the medical sciences within a general framework termed \"survival analysis\" where it is employed with right-censored time-to-failure data. However, K-M methods are equally valid for the left-censored data common in the geosciences. Our S-language software provides an analytical framework based on K-M methods that is tailored to the needs of the earth and environmental sciences community. This includes routines for the generation of empirical cumulative distribution functions, prediction or exceedance probabilities, and related confidence limits computation. Additionally, our software contains K-M-based routines for nonparametric hypothesis testing among an unlimited number of grouping variables. A primary characteristic of K-M methods is that they do not perform extrapolation and interpolation. Thus, these routines cannot be used to model statistics beyond the observed data range or when linear interpolation is desired. For such applications, the aforementioned parametric and semi-parametric methods must be used.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Computers and Geosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.cageo.2006.09.006","issn":"00983004","usgsCitation":"Lee, L., and Helsel, D., 2007, Statistical analysis of water-quality data containing multiple detection limits II: S-language software for nonparametric distribution modeling and hypothesis testing: Computers & Geosciences, v. 33, no. 5, p. 696-704, https://doi.org/10.1016/j.cageo.2006.09.006.","startPage":"696","endPage":"704","numberOfPages":"9","costCenters":[],"links":[{"id":211885,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.cageo.2006.09.006"},{"id":239259,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"33","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9716e4b08c986b31b891","contributors":{"authors":[{"text":"Lee, L.","contributorId":77730,"corporation":false,"usgs":true,"family":"Lee","given":"L.","email":"","affiliations":[],"preferred":false,"id":426135,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Helsel, D.","contributorId":94492,"corporation":false,"usgs":true,"family":"Helsel","given":"D.","email":"","affiliations":[],"preferred":false,"id":426136,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031448,"text":"70031448 - 2007 - Body size affects the predatory interactions between introduced American Bullfrogs (Rana catesbeiana) and native anurans in China: An experimental study","interactions":[],"lastModifiedDate":"2017-11-15T14:00:24","indexId":"70031448","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2334,"text":"Journal of Herpetology","active":true,"publicationSubtype":{"id":10}},"title":"Body size affects the predatory interactions between introduced American Bullfrogs (Rana catesbeiana) and native anurans in China: An experimental study","docAbstract":"Introduced American Bullfrogs (Rana catesbeiana) have established breeding populations in several provinces in China since their introduction in 1959. Although Bullfrogs are viewed as a potentially important predator of Chinese native anurans, their impacts in the field are difficult to quantify. We used two experiments to examine factors likely to mediate Bullfrog predation on native anurans. First, we examined effects of Bullfrog size and sex on daily consumption of a common Chinese native (Rana limnocharis). Second, we examined whether Bullfrogs consumed similar proportions of four Chinese natives: Black-Spotted Pond Frog (Rana nigromaculata), Green Pond Frog (Rana plancyi plancyi), Rice Frog (R. limnocharis), and Zhoushan Toad (Bufo bufo gargarizans). We found that larger Rana catesbeiana consumed more R. limnocharis per day than did smaller R. catesbeiana, and that daily consumption of R. limnocharis was positively related to R. catesbeiana body size. When provided with adults of four anurans that differed significantly in body size, R. catesbeiana consumed more individuals of the smallest species (R. limnocharis). However, when provided with similarly sized juveniles of the same four species, R. catesbeiana did not consume any species more than expected by chance. Our results suggest that body size plays an important role in the predatory interactions between R. catesbeiana and Chinese native anurans and that, other things being equal, smaller species and individuals are at greater risk of predation by R. catesbeiana. Copyright 2007 Society for the Study of Amphibians and Reptiles.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Herpetology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1670/0022-1511(2007)41[514:BSATPI]2.0.CO;2","issn":"00221511","usgsCitation":"Wang, Y., Guo, Z., Pearl, C., and Li, Y., 2007, Body size affects the predatory interactions between introduced American Bullfrogs (Rana catesbeiana) and native anurans in China: An experimental study: Journal of Herpetology, v. 41, no. 3, p. 514-520, https://doi.org/10.1670/0022-1511(2007)41[514:BSATPI]2.0.CO;2.","startPage":"514","endPage":"520","numberOfPages":"7","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":239893,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212412,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1670/0022-1511(2007)41[514:BSATPI]2.0.CO;2"}],"volume":"41","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f1f6e4b0c8380cd4af14","contributors":{"authors":[{"text":"Wang, Y.","contributorId":64213,"corporation":false,"usgs":true,"family":"Wang","given":"Y.","affiliations":[],"preferred":false,"id":431538,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Guo, Z.","contributorId":101526,"corporation":false,"usgs":true,"family":"Guo","given":"Z.","email":"","affiliations":[],"preferred":false,"id":431539,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pearl, C.A. 0000-0003-2943-7321","orcid":"https://orcid.org/0000-0003-2943-7321","contributorId":30732,"corporation":false,"usgs":true,"family":"Pearl","given":"C.A.","affiliations":[],"preferred":false,"id":431536,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Li, Y.","contributorId":41394,"corporation":false,"usgs":true,"family":"Li","given":"Y.","affiliations":[],"preferred":false,"id":431537,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70030802,"text":"70030802 - 2007 - An automated approach to detecting signals in electroantennogram data","interactions":[],"lastModifiedDate":"2012-03-12T17:21:18","indexId":"70030802","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2205,"text":"Journal of Chemical Ecology","active":true,"publicationSubtype":{"id":10}},"title":"An automated approach to detecting signals in electroantennogram data","docAbstract":"Coupled gas chromatography/electroantennographic detection (GC-EAD) is a widely used method for identifying insect olfactory stimulants present in mixtures of volatiles, and it can greatly accelerate the identification of insect semiochemicals. In GC-EAD, voltage changes across an insect's antenna are measured while the antenna is exposed to compounds eluting from a gas chromatograph. The antenna thus serves as a selective GC detector whose output can be compared to that of a \"general\" GC detector, commonly a flame ionization detector. Appropriate interpretation of GC-EAD results requires that olfaction-related voltage changes in the antenna be distinguishable from background noise that arises inevitably from antennal preparations and the GC-EAD-associated hardware. In this paper, we describe and compare mathematical algorithms for discriminating olfaction-generated signals in an EAD trace from background noise. The algorithms amplify signals by recognizing their characteristic shape and wavelength while suppressing unstructured noise. We have found these algorithms to be both powerful and highly discriminatory even when applied to noisy traces where the signals would be difficult to discriminate by eye. This new methodology removes operator bias as a factor in signal identification, can improve realized sensitivity of the EAD system, and reduces the number of runs required to confirm the identity of an olfactory stimulant. ?? 2007 Springer Science+Business Media, LLC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Chemical Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10886-007-9338-6","issn":"00980331","usgsCitation":"Slone, D., and Sullivan, B., 2007, An automated approach to detecting signals in electroantennogram data: Journal of Chemical Ecology, v. 33, no. 9, p. 1748-1762, https://doi.org/10.1007/s10886-007-9338-6.","startPage":"1748","endPage":"1762","numberOfPages":"15","costCenters":[],"links":[{"id":477239,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.400.2641","text":"External Repository"},{"id":211498,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10886-007-9338-6"},{"id":238794,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"33","issue":"9","noUsgsAuthors":false,"publicationDate":"2007-08-01","publicationStatus":"PW","scienceBaseUri":"5059ea1fe4b0c8380cd4864e","contributors":{"authors":[{"text":"Slone, D. H. 0000-0002-9903-9727","orcid":"https://orcid.org/0000-0002-9903-9727","contributorId":33040,"corporation":false,"usgs":true,"family":"Slone","given":"D. H.","affiliations":[{"id":566,"text":"Southeast Ecological Science Center","active":true,"usgs":true}],"preferred":true,"id":428753,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sullivan, B.T.","contributorId":91690,"corporation":false,"usgs":true,"family":"Sullivan","given":"B.T.","email":"","affiliations":[],"preferred":false,"id":428754,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031446,"text":"70031446 - 2007 - Impacts of the 2004 Indian ocean tsunami on the southwest coasts of Sri Lanka","interactions":[],"lastModifiedDate":"2014-09-09T11:50:21","indexId":"70031446","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Impacts of the 2004 Indian ocean tsunami on the southwest coasts of Sri Lanka","docAbstract":"The 2004 Indian Ocean tsunami caused major landscape changes along the southwest coasts of Sri Lanka that were controlled by the flow, natural topography and bathymetry, and anthropogenic modifications of the terrain. Landscape changes included substantial beach erosion and scouring of return-flow channels near the beach, and deposition of sand sheets across the narrow coastal plain. In many areas tsunami deposits also included abundant building rubble due to the extensive destruction of homes and businesses in areas of dense development. Trim lines and flow directions confirmed that shoreline orientation and wave refraction from embayments and rock-anchored headlands locally focused the flow and amplified the inundation. Tsunami deposits were 1 to 36 cm thick but most were less than 25 cm thick. Deposit thickness depended partly on antecedent topography. The deposits were composed of coarse to medium sand organized into a few sets of plane parallel laminae that exhibited overall upward fining and landward thinning trends.
","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","conferenceLocation":"New Orleans, LA","language":"English","publisher":"American Society of Civil Engineers","doi":"10.1061/40926(239)82","isbn":"0784409269; 9780784409268","usgsCitation":"Morton, R., Goff, J.A., and Nichol, S.L., 2007, Impacts of the 2004 Indian ocean tsunami on the southwest coasts of Sri Lanka, in Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes, New Orleans, LA, p. 1061-1074, https://doi.org/10.1061/40926(239)82.","productDescription":"14 p.","startPage":"1061","endPage":"1074","numberOfPages":"14","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":212410,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/40926(239)82"},{"id":239891,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Sri Lanka","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 79.522,5.9191 ], [ 79.522,9.836 ], [ 81.8787,9.836 ], [ 81.8787,5.9191 ], [ 79.522,5.9191 ] ] ] } } ] }","noUsgsAuthors":false,"publicationDate":"2012-04-26","publicationStatus":"PW","scienceBaseUri":"505a38f8e4b0c8380cd61766","contributors":{"authors":[{"text":"Morton, Robert A.","contributorId":88333,"corporation":false,"usgs":true,"family":"Morton","given":"Robert A.","affiliations":[],"preferred":false,"id":431530,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Goff, John A.","contributorId":96087,"corporation":false,"usgs":false,"family":"Goff","given":"John","email":"","middleInitial":"A.","affiliations":[{"id":12811,"text":"Institute for Geophysics, Jackson School of Geosciences, University of Texas, Austin","active":true,"usgs":false}],"preferred":false,"id":431531,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nichol, Scott L.","contributorId":41654,"corporation":false,"usgs":true,"family":"Nichol","given":"Scott","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":431529,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031445,"text":"70031445 - 2007 - Exploring rippled scour depressions offshore Huntington Beach, CA","interactions":[],"lastModifiedDate":"2023-07-25T11:11:48.23523","indexId":"70031445","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Exploring rippled scour depressions offshore Huntington Beach, CA","docAbstract":"Vertical profiles of the chlorofluorocarbons CFC‐11, CFC‐12, and CFC‐113 penetrating aerobic and anaerobic parts of a shallow sandy aquifer show that the CFC gases are degraded in the <1 m thick transition zone from aerobic to anaerobic groundwater in a pyritic sand aquifer at Rabis Creek, Denmark. Two‐dimensional solute transport simulations with either zero‐order or first‐order degradation in the anaerobic zone corroborate this interpretation. The transport model was previously calibrated against detailed tritium profiles in the same wells. First‐order degradation is found to best match the observed CFC profiles yielding an approximate half‐life of a few months for CFC‐11. Degradation is not as clearly recognized for CFC‐12 and CFC‐113, but it may occur with rates corresponding to a half‐life of a few years or more. Data indicate a geochemical control of the CFC concentration gradient at the redox front and that denitrification and denitrifiers are not of major importance for the observed CFC degradation. The responsible mechanism behind the observed degradation is not known but we suggest that reductive dehalogenation by surface‐bound Fe(II) on pyrite possibly enhanced by the presence of Fe(III)‐bearing weathering products (green rust) may be a plausible mechanism. The observed data and the performed simulations confirm the potential application of the CFC gases as age‐dating tools in the aerobic part of the investigated aquifer, but also that CFC data must be analyzed carefully before it is used as a dating tool in reducing aquifers because degradation may have occurred. The use of multiple or alternative tracers should be considered in anaerobic environments.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006WR005854","usgsCitation":"Hinsby, K., Højberg, A., Engesgaard, P., Jensen, K., Larsen, F., Plummer, N., and Busenberg, E., 2007, Transport and degradation of chlorofluorocarbons (CFCs) in the pyritic Rabis Creek aquifer, Denmark: Water Resources Research, v. 43, no. 10, Article W10423; 15 p., https://doi.org/10.1029/2006WR005854.","productDescription":"Article W10423; 15 p.","costCenters":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"links":[{"id":487015,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006wr005854","text":"Publisher Index Page"},{"id":239857,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Denmark","otherGeospatial":"Rabis Creek aquifer","volume":"43","issue":"10","noUsgsAuthors":false,"publicationDate":"2007-10-20","publicationStatus":"PW","scienceBaseUri":"505bb73ae4b08c986b32711e","contributors":{"authors":[{"text":"Hinsby, K.","contributorId":15013,"corporation":false,"usgs":true,"family":"Hinsby","given":"K.","affiliations":[],"preferred":false,"id":431520,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Højberg, Anker L.","contributorId":187776,"corporation":false,"usgs":false,"family":"Højberg","given":"Anker L.","affiliations":[],"preferred":false,"id":431518,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Engesgaard, P.","contributorId":12695,"corporation":false,"usgs":true,"family":"Engesgaard","given":"P.","affiliations":[],"preferred":false,"id":431519,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jensen, K.H.","contributorId":75710,"corporation":false,"usgs":true,"family":"Jensen","given":"K.H.","email":"","affiliations":[],"preferred":false,"id":431522,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Larsen, F.","contributorId":104288,"corporation":false,"usgs":true,"family":"Larsen","given":"F.","affiliations":[],"preferred":false,"id":431524,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"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":431523,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Busenberg, Eurybiades ebusenbe@usgs.gov","contributorId":2271,"corporation":false,"usgs":true,"family":"Busenberg","given":"Eurybiades","email":"ebusenbe@usgs.gov","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":431521,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70031631,"text":"70031631 - 2007 - A crustal seismic velocity model for the UK, Ireland and surrounding seas","interactions":[],"lastModifiedDate":"2023-07-06T12:30:27.908537","indexId":"70031631","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"A crustal seismic velocity model for the UK, Ireland and surrounding seas","docAbstract":"A regional model of the 3-D variation in seismic P-wave velocity structure in the crust of NW Europe has been compiled from wide-angle reflection/refraction profiles. Along each 2-D profile a velocity–depth function has been digitised at 5 km intervals. These 1-D velocity functions were mapped into three dimensions using ordinary kriging with weights determined to minimise the difference between digitised and interpolated values. An analysis of variograms of the digitised data suggested a radial isotropic weighting scheme was most appropriate. Horizontal dimensions of the model cells are optimised at 40 × 40 km and the vertical dimension at 1 km. The resulting model provides a higher resolution image of the 3-D variation in seismic velocity structure of the UK, Ireland and surrounding areas than existing models. The construction of the model through kriging allows the uncertainty in the velocity structure to be assessed. This uncertainty indicates the high density of data required to confidently interpolate the crustal velocity structure, and shows that for this region the velocity is poorly constrained for large areas away from the input data.
","language":"English","publisher":"Oxford Academic","doi":"10.1111/j.1365-246X.2007.03569.x","issn":"0956540X","usgsCitation":"Kelly, A., England, R., and Maguire, P.K., 2007, A crustal seismic velocity model for the UK, Ireland and surrounding seas: Geophysical Journal International, v. 171, no. 3, p. 1172-1184, https://doi.org/10.1111/j.1365-246X.2007.03569.x.","productDescription":"13 p.","startPage":"1172","endPage":"1184","numberOfPages":"13","costCenters":[],"links":[{"id":477058,"rank":2,"type":{"id":41,"text":"Open Access External Repository Page"},"text":"External Repository"},{"id":240077,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United Kingdom, Ireland","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -13.140348177630926,\n 59.38308254359461\n ],\n [\n -13.140348177630926,\n 49.365106758849805\n ],\n [\n 2.6731794840919463,\n 49.365106758849805\n ],\n [\n 2.6731794840919463,\n 59.38308254359461\n ],\n [\n -13.140348177630926,\n 59.38308254359461\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"171","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-09-27","publicationStatus":"PW","scienceBaseUri":"5059e3a2e4b0c8380cd4614c","contributors":{"authors":[{"text":"Kelly, A.","contributorId":86975,"corporation":false,"usgs":true,"family":"Kelly","given":"A.","email":"","affiliations":[],"preferred":false,"id":432428,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"England, R.W.","contributorId":106663,"corporation":false,"usgs":true,"family":"England","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":432429,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Maguire, Peter K.H.","contributorId":15766,"corporation":false,"usgs":true,"family":"Maguire","given":"Peter","email":"","middleInitial":"K.H.","affiliations":[],"preferred":false,"id":432427,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70030326,"text":"70030326 - 2007 - Remaining uncertainties in the use of Rn-222 as a quantitative tracer of submarine groundwater discharge","interactions":[],"lastModifiedDate":"2012-03-12T17:21:02","indexId":"70030326","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Remaining uncertainties in the use of Rn-222 as a quantitative tracer of submarine groundwater discharge","docAbstract":"Research performed in many locations over the past decade has shown that radon is an effective tracer for quantifying submarine groundwater discharge (SGD). The technique works because both fresh and saline groundwaters acquire radon from the subterranean environment and display activities that are typically orders of magnitude greater than those found in coastal seawaters. However, some uncertainties and unanswered problems remain. We focus here on three components of the mass balance, each of which has some unresolved issues: (1) End-member radon - what to do if groundwater Rn measurements are highly variable? (2) Atmospheric evasion -do the standard gas exchange equations work under high-energy coastal mixing scenarios? And (3) \"mixing\" losses - are there other significant radon losses (e.g. recharge of coastal waters into the aquifer) besides those attributed to mixing with lower-activity waters offshore? We address these issues using data sets collected from several different types of coastal environment. Copyright ?? 2007 IAHS Press.","largerWorkTitle":"IAHS-AISH Publication","conferenceTitle":"International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the In","conferenceDate":"2 July 2007 through 13 July 2007","conferenceLocation":"Perugia","language":"English","issn":"01447","isbn":"9781901502046","usgsCitation":"Burnett, W.C., Santos, I., Weinstein, Y., Swarzenski, P., and Herut, B., 2007, Remaining uncertainties in the use of Rn-222 as a quantitative tracer of submarine groundwater discharge, in IAHS-AISH Publication, no. 312, Perugia, 2 July 2007 through 13 July 2007, p. 109-118.","startPage":"109","endPage":"118","numberOfPages":"10","costCenters":[],"links":[{"id":239441,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"312","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa6c2e4b0c8380cd85033","contributors":{"authors":[{"text":"Burnett, W. C.","contributorId":39779,"corporation":false,"usgs":false,"family":"Burnett","given":"W.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":426705,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Santos, I.R.","contributorId":94499,"corporation":false,"usgs":true,"family":"Santos","given":"I.R.","email":"","affiliations":[],"preferred":false,"id":426706,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weinstein, Y.","contributorId":100186,"corporation":false,"usgs":true,"family":"Weinstein","given":"Y.","email":"","affiliations":[],"preferred":false,"id":426707,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"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":426704,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Herut, B.","contributorId":101444,"corporation":false,"usgs":true,"family":"Herut","given":"B.","affiliations":[],"preferred":false,"id":426708,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70030803,"text":"70030803 - 2007 - Simultaneous determination of Cr(iii) and Cr(vi) using reversed-phased ion-pairing liquid chromatography with dynamic reaction cell inductively coupled plasma mass spectrometry","interactions":[],"lastModifiedDate":"2012-03-12T17:21:18","indexId":"70030803","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2155,"text":"Journal of Analytical Atomic Spectrometry","active":true,"publicationSubtype":{"id":10}},"title":"Simultaneous determination of Cr(iii) and Cr(vi) using reversed-phased ion-pairing liquid chromatography with dynamic reaction cell inductively coupled plasma mass spectrometry","docAbstract":"A method for the simultaneous determination of Cr(iii) and Cr(vi) species in waters, soil leachates and synthetic bio-fluids is described. The method uses reversed-phase ion-pairing liquid chromatography to separate the chromium species and a dynamic reaction cell (DRC??) equipped ICP-MS for detection of chromium. Separation of the chromium species is carried out in less than 2 min. Cr(iii) is complexed with ethylenediaminetetraacetic acid (EDTA) prior to separation by mixing samples with the mobile phase containing 2.0 mM tetrabutylammonium hydroxide (TBAOH), 0.5 mM EDTA (dipotassium salt), and 5% (vol/vol) methanol, adjusted to pH 7.6. The interfering 40Ar 12C+ background peak at mass 52 was reduced by over four orders of magnitude to less than 200 cps by using 0.65 mL min-1 ammonia as a reaction gas and an RPq setting on the DRC of 0.75. Method detection limits (MDLs) of 0.09 ??g L-1 for Cr(iii) and 0.06 ??g L-1 for Cr(vi) were obtained based on peak areas at mass 52 for 50 ??L injections of low level spikes. Reproducibility at 2 ??g L-1 was 3% RSD for 5 replicate injections. The tolerance of the method to various levels of common cations and anions found in natural waters and to matrix constituents found in soil leachates and simulated gastric and lung fluids was tested by performing spike recovery calculations for a variety of samples. ?? The Royal Society of Chemistry.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Analytical Atomic Spectrometry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1039/b704597b","issn":"02679477","usgsCitation":"Wolf, R., Morrison, J., and Goldhaber, M., 2007, Simultaneous determination of Cr(iii) and Cr(vi) using reversed-phased ion-pairing liquid chromatography with dynamic reaction cell inductively coupled plasma mass spectrometry: Journal of Analytical Atomic Spectrometry, v. 22, no. 9, p. 1051-1060, https://doi.org/10.1039/b704597b.","startPage":"1051","endPage":"1060","numberOfPages":"10","costCenters":[],"links":[{"id":211499,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1039/b704597b"},{"id":238795,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b90d0e4b08c986b319682","contributors":{"authors":[{"text":"Wolf, R.E.","contributorId":11827,"corporation":false,"usgs":true,"family":"Wolf","given":"R.E.","email":"","affiliations":[],"preferred":false,"id":428756,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Morrison, J.M.","contributorId":9063,"corporation":false,"usgs":true,"family":"Morrison","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":428755,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Goldhaber, M. B. 0000-0002-1785-4243","orcid":"https://orcid.org/0000-0002-1785-4243","contributorId":103280,"corporation":false,"usgs":true,"family":"Goldhaber","given":"M. B.","affiliations":[],"preferred":false,"id":428757,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031443,"text":"70031443 - 2007 - Composition of pore water in lake sediments, research site \"B\", Osage County, Oklahoma: Implications for lake water quality and benthic organisms","interactions":[],"lastModifiedDate":"2020-09-17T20:39:56.522711","indexId":"70031443","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":835,"text":"Applied Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Composition of pore water in lake sediments, research site \"B\", Osage County, Oklahoma: Implications for lake water quality and benthic organisms","docAbstract":"Shallow ground water at US Geological Survey research site B in northeastern Oklahoma is contaminated with NaCl-rich brine from past and present oil production operations. Contaminated ground water provides a potential source of salts, metals, and hydrocarbons to sediment and water of adjacent Skiatook Lake. A former brine storage pit 10 m in diameter that is now submerged just offshore from site B provides an additional source of contamination. Cores of the upper 16–40 cm of lake sediment were taken at the submerged brine pit, near an offshore saline seep, and at a location containing relatively uncontaminated lake sediment. Pore waters from each 2-cm interval were separated by centrifugation and analyzed for dissolved anions, cations, and trace elements. High concentrations of dissolved Cl− in pore waters (200–5000 mg/L) provide the most direct evidence of contamination, and contrast sharply with an average value of only about 37 mg/L in Skiatook Lake. Chloride/Br− mass ratios of 220–240 in contaminated pore waters are comparable to values in contaminated well waters collected onshore. Dissolved concentrations of Se, Pb, Cu and Ni in Cl−-rich pore waters exceed current US Environmental Protection Agency criteria for probable toxicity to aquatic life. At the submerged brine storage pit, the increase of Cl− concentration with depth is consistent with diffusion-dominant transport from deeper contaminated sediments. Near the offshore saline seep, pore water Cl− concentrations are consistently high and vary irregularly with depth, indicating probable Cl− transport by layer-directed advective flow. Estimated annual contributions of Cl− to the lake from the brine storage pit (∼20 kg) and the offshore seep (∼9 kg) can be applied to any number of similar sources. Generous estimates of the number of such sources at site B indicate minimal impact on water quality in the local inlet of Skiatook Lake. Similar methodologies can be applied at other sites of NaCl contamination surrounding Skiatook Lake and elsewhere.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.apgeochem.2007.04.013","usgsCitation":"Zielinski, R.A., Herkelrath, W.N., and Otton, J.K., 2007, Composition of pore water in lake sediments, research site \"B\", Osage County, Oklahoma: Implications for lake water quality and benthic organisms: Applied Geochemistry, v. 22, no. 10, p. 2177-2192, https://doi.org/10.1016/j.apgeochem.2007.04.013.","productDescription":"16 p.","startPage":"2177","endPage":"2192","numberOfPages":"16","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":239822,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oklahoma","county":"Osage","otherGeospatial":"Skiatook Lake","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -96.29825592041016,\n 36.28967012684225\n ],\n [\n -96.06994628906249,\n 36.28967012684225\n ],\n [\n -96.06994628906249,\n 36.446694448546836\n ],\n [\n -96.29825592041016,\n 36.446694448546836\n ],\n [\n -96.29825592041016,\n 36.28967012684225\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"22","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f92ae4b0c8380cd4d490","contributors":{"authors":[{"text":"Zielinski, Robert A. 0000-0002-4047-5129 rzielinski@usgs.gov","orcid":"https://orcid.org/0000-0002-4047-5129","contributorId":1593,"corporation":false,"usgs":true,"family":"Zielinski","given":"Robert","email":"rzielinski@usgs.gov","middleInitial":"A.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":431517,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Herkelrath, William N. 0000-0002-6149-5524 wnherkel@usgs.gov","orcid":"https://orcid.org/0000-0002-6149-5524","contributorId":2612,"corporation":false,"usgs":true,"family":"Herkelrath","given":"William","email":"wnherkel@usgs.gov","middleInitial":"N.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":431516,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Otton, James K. jkotton@usgs.gov","contributorId":1170,"corporation":false,"usgs":true,"family":"Otton","given":"James","email":"jkotton@usgs.gov","middleInitial":"K.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":431515,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031442,"text":"70031442 - 2007 - Near-fault peak ground velocity from earthquake and laboratory data","interactions":[],"lastModifiedDate":"2023-07-24T11:18:44.358195","indexId":"70031442","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Near-fault peak ground velocity from earthquake and laboratory data","docAbstract":"We test the hypothesis that peak ground velocity (PGV) has an upper bound independent of earthquake magnitude and that this bound is controlled primarily by the strength of the seismogenic crust. The highest PGVs, ranging up to several meters per second, have been measured at sites within a few kilometers of the causative faults. Because the database for near-fault PGV is small, we use earthquake slip models, laboratory experiments, and evidence from a mining-induced earthquake to investigate the factors influencing near-fault PGV and the nature of its scaling. For each earthquake slip model we have calculated the peak slip rates for all subfaults and then chosen the maximum of these rates as an estimate of twice the largest near-fault PGV. Nine slip models for eight earthquakes, with magnitudes ranging from 6.5 to 7.6, yielded maximum peak slip rates ranging from 2.3 to 12 m/sec with a median of 5.9 m/sec. By making several adjustments, PGVs for small earthquakes can be simulated from peak slip rates measured during laboratory stick-slip experiments. First, we adjust the PGV for differences in the state of stress (i.e., the difference between the laboratory loading stresses and those appropriate for faults at seismogenic depths). To do this, we multiply both the slip and the peak slip rate by the ratio of the effective normal stresses acting on fault planes measured at 6.8 km depth at the KTB site, Germany (deepest available in situ stress measurements), to those acting on the laboratory faults. We also adjust the seismic moment by replacing the laboratory fault with a buried circular shear crack whose radius is chosen to match the experimental unloading stiffness. An additional, less important adjustment is needed for experiments run in triaxial loading conditions. With these adjustments, peak slip rates for 10 stick-slip events, with scaled moment magnitudes from -2.9 to 1.0, range from 3.3 to 10.3 m/sec, with a median of 5.4 m/sec. Both the earthquake and laboratory results are consistent with typical maximum peak slip rates averaging between 5 and 6 m/sec or corresponding maximum near-fault PGVs between 2.5 and 3 m/sec at seismogenic depths, independent of magnitude. Our ability to replicate maximum slip rates in the fault zones of earthquakes by adjusting the corresponding laboratory rates using the ratio of effective normal stresses acting on the fault planes suggests that the strength of the seismogenic crust is the important factor limiting the near-fault PGV.","language":"English","publisher":"Seismological Society of America","doi":"10.1785/0120060268","issn":"00371106","usgsCitation":"McGarr, A., and Fletcher, J.B., 2007, Near-fault peak ground velocity from earthquake and laboratory data: Bulletin of the Seismological Society of America, v. 97, no. 5, p. 1502-1510, https://doi.org/10.1785/0120060268.","productDescription":"9 p.","startPage":"1502","endPage":"1510","numberOfPages":"9","costCenters":[],"links":[{"id":239821,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"97","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a63dce4b0c8380cd7273d","contributors":{"authors":[{"text":"McGarr, Art 0000-0001-9769-4093","orcid":"https://orcid.org/0000-0001-9769-4093","contributorId":43491,"corporation":false,"usgs":true,"family":"McGarr","given":"Art","affiliations":[],"preferred":false,"id":431514,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fletcher, Joe B.","contributorId":8850,"corporation":false,"usgs":true,"family":"Fletcher","given":"Joe","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":431513,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031441,"text":"70031441 - 2007 - Effects of two sediment types on the fluorescence yield of two Hawaiian scleractinian corals","interactions":[],"lastModifiedDate":"2023-07-25T11:05:23.988687","indexId":"70031441","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2664,"text":"Marine Environmental Research","active":true,"publicationSubtype":{"id":10}},"title":"Effects of two sediment types on the fluorescence yield of two Hawaiian scleractinian corals","docAbstract":"This study used non-invasive pulse-amplitude modulated (PAM) fluorometry to measure the maximum fluorescence yield (Fv/Fm) of two Hawaiian scleractinian coral species exposed to short-term sedimentation stress. Beach sand or harbor mud was applied to coral fragments in a flow-through aquarium system for 0-45 h, and changes in Fv/Fm were measured as a function of sediment type and length of exposure. Corals were monitored for up to 90 h to document recovery after sediment removal. Sediment deposition significantly decreased Fv/Fm in both species and was a function of sediment type and time. Corals that received sediment for 30 h or more had the greatest reduction in yield and exhibited little recovery over the course of the experiment. Harbor mud caused a greater reduction in Porites lobata yield than beach sand, whereas both sediment types had equally deleterious effects on Montipora capitata. Colony morphology and sediment type were important factors in determining yield reduction-P. lobata minimized damage from coarse sand grains by passive sediment rejection or accumulation in depressions in the skeleton, and fluorescence yield decreased most in corals exposed to sticky harbor mud or in colonies with flattened morphologies. Species-specific differences could not be tested due to differences in colony morphology and surface area. .
","language":"English","publisher":"Elsevier","doi":"10.1016/j.marenvres.2007.04.001","issn":"01411136","usgsCitation":"Piniak, G., 2007, Effects of two sediment types on the fluorescence yield of two Hawaiian scleractinian corals: Marine Environmental Research, v. 64, no. 4, p. 456-468, https://doi.org/10.1016/j.marenvres.2007.04.001.","productDescription":"13 p.","startPage":"456","endPage":"468","numberOfPages":"13","costCenters":[],"links":[{"id":477081,"rank":2,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hal.science/hal-00562977","text":"External Repository"},{"id":239790,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"64","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0818e4b0c8380cd5198a","contributors":{"authors":[{"text":"Piniak, G.A.","contributorId":35512,"corporation":false,"usgs":true,"family":"Piniak","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":431512,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70030210,"text":"70030210 - 2007 - Generating an image of dispersive energy by frequency decomposition and slant stacking","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030210","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3208,"text":"Pure and Applied Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Generating an image of dispersive energy by frequency decomposition and slant stacking","docAbstract":"We present a new algorithm for calculating an image of dispersive energy in the frequency-velocity (f-v) domain. The frequency decomposition is first applied to a shot gather in the offset-time domain to stretch impulsive data into pseudo-vibroseis data or frequency-swept data. Because there is a deterministic relationship between frequency and time in a sweep used in the frequency decomposition, the first step theoretically completes the transform from time to frequency. The slant stacking is then performed on the frequency-swept data to complete the transform from offset to velocity. This simple two-step algorithm generates an image of dispersive energy in the f-v domain. The straightforward transform only uses offset information of data so that this algorithm can be applied to data acquired with arbitrary geophone-acquisition geometry. Examples of synthetic and real-world data demonstrate that this algorithm generates accurate images of dispersive energy of the fundamental as well as higher modes. ?? Birkha??user Verlag, Basel, 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Pure and Applied Geophysics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00024-007-0204-9","issn":"00334553","usgsCitation":"Xia, J., Xu, Y., and Miller, R., 2007, Generating an image of dispersive energy by frequency decomposition and slant stacking: Pure and Applied Geophysics, v. 164, no. 5, p. 941-956, https://doi.org/10.1007/s00024-007-0204-9.","startPage":"941","endPage":"956","numberOfPages":"16","costCenters":[],"links":[{"id":239291,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211912,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00024-007-0204-9"}],"volume":"164","issue":"5","noUsgsAuthors":false,"publicationDate":"2007-04-16","publicationStatus":"PW","scienceBaseUri":"505a154ee4b0c8380cd54d47","contributors":{"authors":[{"text":"Xia, J.","contributorId":63513,"corporation":false,"usgs":true,"family":"Xia","given":"J.","email":"","affiliations":[],"preferred":false,"id":426138,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Xu, Y.","contributorId":47816,"corporation":false,"usgs":true,"family":"Xu","given":"Y.","email":"","affiliations":[],"preferred":false,"id":426137,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Miller, R. D.","contributorId":92693,"corporation":false,"usgs":true,"family":"Miller","given":"R. D.","affiliations":[],"preferred":false,"id":426139,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031633,"text":"70031633 - 2007 - Spatial and temporal variability in oceanographic and meteorologic forcing along Central California and its implications on nearshore processes","interactions":[],"lastModifiedDate":"2023-07-18T11:09:40.445093","indexId":"70031633","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Spatial and temporal variability in oceanographic and meteorologic forcing along Central California and its implications on nearshore processes","docAbstract":"In the past two decades, the understanding of the important large-scale phenomena (El Niño, upwelling, California current, etc) that drive physical, chemical, and biological processes along the US West Coast has greatly improved. However, the ability to predict the influence of annual and inter-annual events on a regional scale still remains limited. High-resolution hourly data from 6 National Oceanographic and Atmospheric Administration (NOAA) buoys deployed since the early 1980's off Central California were analyzed to improve our understanding of spatial and temporal variability of oceanographic and meteorologic forcing along the coastline. Seasonal to inter-annual trends in wave height, wave period, sea level barometric pressure, sea-surface temperature, and wind direction were identified, as were significant departures in these trends during El Niño and La Niña periods. The results suggest there are increasing wave heights and wave periods, decreasing sea level barometric pressures and variability in sea-surface temperatures, and increasingly variable winds off Central California between 1980 and 2002. The impact of these climatic trends on coastal physical, geological and biologic processes will also be addressed.","language":"English","publisher":"Elsevier","doi":"10.1016/j.jmarsys.2007.02.008","issn":"09247963","usgsCitation":"Wingfield, D., and Storlazzi, C., 2007, Spatial and temporal variability in oceanographic and meteorologic forcing along Central California and its implications on nearshore processes: Journal of Marine Systems, v. 68, no. 3-4, p. 457-472, https://doi.org/10.1016/j.jmarsys.2007.02.008.","productDescription":"16 p.","startPage":"457","endPage":"472","numberOfPages":"16","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":240114,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","volume":"68","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b944fe4b08c986b31a9cc","contributors":{"authors":[{"text":"Wingfield, D.K.","contributorId":16656,"corporation":false,"usgs":true,"family":"Wingfield","given":"D.K.","email":"","affiliations":[],"preferred":false,"id":432435,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Storlazzi, C. D. 0000-0001-8057-4490","orcid":"https://orcid.org/0000-0001-8057-4490","contributorId":98905,"corporation":false,"usgs":true,"family":"Storlazzi","given":"C. D.","affiliations":[],"preferred":false,"id":432436,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ]}