Geochemistry and geophysics field maps used during the USGS 2011 field season in southwest Alaska
Stuart A. Giles
2013, Book chapter, Esri Map Book
The US Geological Survey (USGS) has been studying a variety of geochemical and geophyscial assessment techniques for concealed mineral deposits. The 2011 field season for this project took place in southwest Alaska, northeast of Bristol Bay between Dillingham and Iliamna Lake. Four maps were created for the geochemistry and geophysics...
Characterizing LEDAPS surface reflectance products by comparisons with AERONET, field spectrometer, and MODIS data
Tom Maiersperger, Pat Scaramuzza, Larry Leigh, S. Shrestha, Kevin Gallo, Calli B. Jenkerson, John L. Dwyer
2013, Remote Sensing of Environment (136) 1-13
This study provides a baseline quality check on provisional Landsat Surface Reflectance (SR) products as generated by the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center using Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software. Characterization of the Landsat SR products leveraged comparisons between aerosol optical thickness...
The Idaho cobalt belt
Arthur A. Bookstrom
2013, Northwest Geology (42) 149-162
The Idaho cobalt belt (ICB) is a northwest-trending belt of cobalt (Co) +/- copper (Cu)-bearing deposits and prospects in the Salmon River Mountains of east-central Idaho, U.S.A. The ICB is about 55 km long and 10 km long in its central part, which contains multiple strata-bound ore zones in the...
Telemetry-based mortality estimates of juvenile spot in two North Carolina estuarine creeks
Sarah E. Friedl, Jeffery A. Buckel, Joseph E. Hightower, Frederick S. Scharf, Kenneth H. Pollock
2013, Transactions of the American Fisheries Society (142) 399-415
We estimated natural mortality rates (M) of age-1 Spot Leiostomus xanthurus by using a sonic telemetry approach. Sonic transmitters were surgically implanted into a total of 123 age-1 Spot in two North Carolina estuarine creeks during spring 2009 and 2010, and the fish were monitored by using a stationary acoustic...
Reliability of fish size estimates obtained from multibeam imaging sonar
Joseph E. Hightower, Kevin J. Magowan, Lori M. Brown, Dewayne A. Fox
2013, Journal of Fish and Wildlife Management (4) 86-96
Multibeam imaging sonars have considerable potential for use in fisheries surveys because the video-like images are easy to interpret, and they contain information about fish size, shape, and swimming behavior, as well as characteristics of occupied habitats. We examined images obtained using a dual-frequency identification sonar (DIDSON) multibeam sonar for...
Red-backed vole brain promotes highly efficient in vitro amplification of abnormal prion protein from macaque and human brains infected with variant Creutzfeldt-Jakob disease agent.
Julie Nemecek, Nabanita Nag, Christina M. Carlson, Jay R. Schneider, Dennis M. Heisey, Christopher J. Johnson, David M. Asher, Luisa Gregori
2013, PLoS ONE (8)
Rapid antemortem tests to detect individuals with transmissible spongiform encephalopathies (TSE) would contribute to public health. We investigated a technique known as protein misfolding cyclic amplification (PMCA) to amplify abnormal prion protein (PrPTSE) from highly diluted variant Creutzfeldt-Jakob disease (vCJD)-infected human and macaque brain homogenates, seeking to improve the rapid...
Landsat Data Continuity Mission, now Landsat-8: six months on-orbit
Brian L. Markham, James C. Storey, James R. Irons
2013, Conference Paper, SPIE 8866, Earth Observing Systems
The Landsat Data Continuity Mission (LDCM) with two pushbroom Earth-imaging sensors, the Operational Land Imager (OLI) and the Thermal InfraRed Sensor (TIRS), was launched on February 11, 2013. Its on-orbit check out period or commissioning phase lasted about 90 days. During this phase the spacecraft and its instruments were activated,...
Overcoming the momentum of anachronism: American geologic mapping in a twenty-first-century world
Kyle House, Ryan Clark, Joe Kopera
2013, GSA Special Papers (502) 103-125
The practice of geologic mapping is undergoing conceptual and methodological transformation. Profound changes in digital technology in the past 10 yr have potential to impact all aspects of geologic mapping. The future of geologic mapping as a relevant scientific enterprise depends on widespread adoption of new technology and ideas about...
Simulating the water budget of a Prairie Potholes complex from LiDAR and hydrological models in North Dakota, USA
Shengli Huang, Claudia Young, Omar I. Abdul-Aziz, Devendra Dahal, Min Feng, Shuguang Liu
2013, Hydrological Sciences Journal (58) 1434-1444
Hydrological processes of the wetland complex in the Prairie Pothole Region (PPR) are difficult to model, partly due to a lack of wetland morphology data. We used Light Detection And Ranging (LiDAR) data sets to derive wetland features; we then modelled rainfall, snowfall, snowmelt, runoff, evaporation, the “fill-and-spill” mechanism, shallow...
Challenges and opportunities in studying and managing striped bass and its hybrids in the 21st Century
Phillip William Bettoli
2013, Conference Paper
No abstract available....
Zinc isotope and transition-element dynamics accompanying hydrozincite biomineralization in the Rio Naracauli, Sardinia, Italy
Richard B. Wanty, F. Podda, Giovanni De Giudici, R. Cidu, Pierfranco Lattanzi
2013, Chemical Geology (337-338) 1-10
The Rio Naracauli in SW Sardinia drains part of the Ingurtosu Zn–Pb mining district, and contains extreme concentrations of dissolved Zn at near-neutral pH. In the upper reaches of the stream, pH, alkalinity and Zn concentrations are such that hydrozincite [Zn5(CO3)2(OH)6] precipitates in a biologically mediated process facilitated by a...
Woodland dynamics at the northern range periphery: A challenge for protected area management in a changing world
Scott L. Powell, Andrew J. Hansen, Thomas J. Rodhouse, Lisa K. Garrett, Julio L. Betancourt, Gordon H. Dicus, Meghan K. Lonneker
2013, PLoS ONE (8)
Managers of protected natural areas increasingly are confronted with novel ecological conditions and conflicting objectives to preserve the past while fostering resilience for an uncertain future. This dilemma may be pronounced at range peripheries where rates of change are accelerated and ongoing invasions often are perceived as threats to local...
The false spring of 2012, earliest in North American record
T.R. Ault, G.M. Henebry, K. M. de Beurs, M.D. Schwartz, Julio L. Betancourt, David Moore
2013, Eos, Transactions, American Geophysical Union (94) 181-183
Phenology - the study of recurring plant and animal life cycle stages, especially their timing and relationships with weather and climate - is becoming an essential tool for documenting, communicating, and anticipating the consequences of climate variability and change. For example, March 2012 broke numerous records for warm temperatures and...
Cross-scale morphology
Craig R. Allen, Crawford S. Holling, Ahjond S. Garmestani
Abdel H. El-Shaarawi, Walter W. Piegorsch, editor(s)
2013, Book chapter, Encyclopedia of environmetrics
The scaling of physical, biological, ecological and social phenomena is a major focus of efforts to develop simple representations of complex systems. Much of the attention has been on discovering universal scaling laws that emerge from simple physical and geometric processes. However, there are regular patterns of departures both from...
Temporal and spatial variation in bird and human use of beaches in southern California
Kevin D. Lafferty, Donald A. Rodriguez, Angela Chapman
2013, SpringerPlus (2) 1-14
Southern California’s beaches can support a remarkable diversity of birds along the Pacific Flyway. We asked whether seasonal, annual, and spatial factors affect bird richness and abundance on public beaches. To do so, we conducted three years of monthly bird surveys on 12 sandy beaches in Ventura California. Across all...
Future climate: Projected average
Daniel Cayan, Mary Tyree, Kenneth E. Kunkel, Chris Castro, Alexander Gershunov, Joseph Barsugli, Andrea Ray, Jonathan Overpeck, Michael Anderson, Joellen Russell, Balaji Rajagopalan, Imtiaz Rangwala, Phil Duffy
Gregg Garfin, Angela Jardine, Robert W. Merideth, Mary Black, Sarah LeRoy, editor(s)
2013, Book chapter, Assessment of climate change in southwest United States: a report prepared for the National Climate Assessment
No abstract available....
The Chaitén rhyolite lava dome: Eruption sequence, lava dome volumes, rapid effusion rates and source of the rhyolite magma
John S. Pallister, Angela K. Diefenbach, William C. Burton, Jorge Munoz, Julia P. Griswold, Luis E. Lara, Jacob B. Lowenstern, Carolina E. Valenzuela
2013, Andean Geology (40) 277-294
We use geologic field mapping and sampling, photogrammetric analysis of oblique aerial photographs, and digital elevation models to document the 2008-2009 eruptive sequence at Chaitén Volcano and to estimate volumes and effusion rates for the lava dome. We also present geochemical and petrologic data that contribute to understanding the source...
Biochar effect on maize yield and soil characteristics in five conservation farming sites in Zambia
Gerard Cornelissen, Vegard Martinsen, Victor Shitumbanuma, Vanja Alling, Gijs D. Breedveld, David W. Rutherford, Magnus Sparrevik, Sarah E. Hale, Alfred Obia, Jan Mulder
2013, Agronomy Journal (3) 256-274
Biochar addition to agricultural soils can improve soil fertility, with the added bonus of climate change mitigation through carbon sequestration. Conservation farming (CF) is precision farming, often combining minimum tillage, crop rotation and residue retention. In the present farmer-led field trials carried out in Zambia, the use of a low...
Very long period conduit oscillations induced by rockfalls at Kilauea Volcano, Hawaii
Bernard A. Chouet, Phillip B. Dawson
2013, Journal of Geophysical Research B: Solid Earth (118) 5352-5371
Eruptive activity at the summit of Kilauea Volcano, Hawaii, beginning in 2010 and continuing to the present time is characterized by transient outgassing bursts accompanied by very long period (VLP) seismic signals triggered by rockfalls from the vent walls impacting a lava lake in a pit within the Halemaumau pit...
Pushing the Volcanic Explosivity Index to its limit and beyond: Constraints from exceptionally weak explosive eruptions at Kīlauea in 2008
Bruce F. Houghton, Don Swanson, J. Rausch, R.J. Carey, S.A. Fagents, Tim R. Orr
2013, Geology (41) 627-630
Estimating the mass, volume, and dispersal of the deposits of very small and/or extremely weak explosive eruptions is difficult, unless they can be sampled on eruption. During explosive eruptions of Halema‘uma‘u Crater (Kīlauea, Hawaii) in 2008, we constrained for the first time deposits of bulk volumes as small as 9–300...
Preliminary report on the Late Pleistocene and Holocene diatoms of Swamp Lake, Yosemite National Park, California, USA
Scott W. Starratt, R. Scott Anderson
2013, Phytotaxa (127) 128-149
Swamp Lake, Yosemite National Park, is the only known lake in California containing long sequences of varved sediments and thus has the potential to provide a high-resolution record of climate variability. This preliminary analysis of the diatom assemblages from a 947-cm-long composite sediment core (freeze core FZ02–05; 0–67 cm, Livingstone...
Sorption of pure N2O to biochars and other organic and inorganic materials under anhydrous conditions
Gerard Cornelissen, David W. Rutherford, Hans Peter H. Arp, Peter Dorsch, Charlene N. Kelly, Colleen E. Rostad
2013, Environmental Science & Technology (47) 7704-7712
Suppression of nitrous oxide (N2O) emissions from soil is commonly observed after amendment with biochar. The mechanisms accounting for this suppression are not yet understood. One possible contributing mechanism is N2O sorption to biochar. The sorption of N2O and carbon dioxide (CO2) to four biochars was measured in an anhydrous...
Distribution of burrowing owls in east-central South Dakota
Jill A. Shaffer, Jason P. Thiele
2013, The Prairie Naturalist (45) 60-64
Western burrowing owl (Athene cunicularia hypugaea) populations have declined across much of western North America, particularly at the northern and eastern edges of the species’ breeding range (Martell et al. 2001, Murphy et al. 2001, Shyry et al. 2001, Skeel et al. 2001, Klute et al. 2003). In South Dakota,...
Origin of the Blytheville Arch, and long-term displacement on the New Madrid seismic zone, central United States
Thomas L. Pratt, Robert Williams, Jackson K. Odum, William J. Stephenson
2013, GSA Special Papers (493) 1-15
The southern arm of the New Madrid seismic zone of the central United States coincides with the buried, ~110 km by ~20 km Blytheville Arch antiform within the Cambrian–Ordovician Reelfoot rift graben. The Blytheville Arch has been interpreted at various times as a compressive structure, an igneous intrusion, or a...
Estimating abundance of adult striped bass in reservoirs using mobile hydroacoustics
Joseph E. Hightower, J. Christopher Taylor, Donald J. Degan
2013, American Fisheries Society Symposium (80) 279-289
Hydroacoustic surveys have proven valuable for estimating reservoir forage fish abundance but are more challenging for adult predators such as striped bass Morone saxatilis. Difficulties in assessing striped bass in reservoirs include their low density and the inability to distinguish species with hydroacoustic data alone. Despite these difficulties, mobile hydroacoustic...
