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Southwest

Regions L2 Landing Page Tabs

Filter Total Items: 2,176
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Year Published: 2017

Geomorphological evidence for ground ice on dwarf planet Ceres

Five decades of observations of Ceres suggest that the dwarf planet has a composition similar to carbonaceous meteorites and may have an ice-rich outer shell protected by a silicate layer. NASA’s Dawn spacecraft has detected ubiquitous clays, carbonates and other products of aqueous alteration across the surface of Ceres, but surprisingly it has...

Schmidt, Britney E.; Hughson, Kynan H.G.; Chilton, Heather T.; Scully, Jennifer E. C.; Platz, Thomas; Nathues, Andreas; Sizemore, Hanna; Bland, Michael T.; Byrne, Shane; Marchi, Simone; O'Brien, David; Schorghofer, Norbert; Hiesinger, Harald; Jaumann, Ralf; Hendrick Pasckert, Jan; Lawrence, Justin D.; Buzckowski, Debra; Castillo-Rogez, Julie C.; Sykes, Mark V.; Schenk, Paul M.; DeSanctis, Maria-Cristina; Mitri, Giuseppe; Formisano, Michelangelo; Li, Jian-Yang; Reddy, Vishnu; Le Corre, Lucille; Russell, Christopher T.; Raymond, Carol A.

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Year Published: 2017

Is GPS telemetry location error screening beneficial?

The accuracy of global positioning system (GPS) locations obtained from study animals tagged with GPS monitoring devices has been a concern as to the degree it influences assessments of movement patterns, space use, and resource selection estimates. Many methods have been proposed for screening data to retain the most accurate positions for...

Ironside, Kirsten E.; Mattson, David J.; Arundel, Terence R.; Hansen, Jered R.
Ironside, K.E., Mattson, D.J., Arundel, T.R., and Hansen, J.R., 2017, Is GPS telemetry location error screening beneficial?: Wildlife Biology, v. (online), http://dx.doi.org/10.2981/wlb.00229.

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Year Published: 2017

Potential human impacts of overlapping land-use and climate in a sensitive dryland: a case study of the Colorado Plateau, USA

Climate and land-use interactions are likely to affect future environmental and socioeconomic conditions in drylands, which tend to be limited by water resources and prone to land degradation. We characterized the potential for interactions between land-use types and land-use and climate change in a model dryland system, the Colorado Plateau, a...

Copeland, Stella M.; Bradford, John B.; Duniway, Michael C.; Schuster, Rudy
Copeland, S.M., Bradford, J.B., Duniway, M.C., and Schuster, R.M., Potential human impacts of overlapping land-use and climate in a sensitive dryland: a case study of the Colorado Plateau, USA: Ecosphere, vol. 8, no. 5, http://dx.doi.org//10.1002/ecs2.1823.

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Year Published: 2017

Bedrock and structural geologic maps of eastern Candor Sulci, western Ceti Mensa, and southeastern Ceti Mensa, Candor Chasma, Valles Marineris region of Mars

This map product contains a set of three 1:18,000-scale maps showing the geology and structure of study areas in the western Candor Chasma region of Valles Marineris, Mars. These maps are part of an informal series of large-scale maps and map-based topical studies aimed at refining current understanding of the geologic history of western Candor...

Okubo, Chris H.; Gaither, Tenielle A.
Okubo, C.H., and Gaither, T.A., 2017, Bedrock and structural geologic maps of eastern Candor Sulci, western Ceti Mensa, and southeastern Ceti Mensa, Candor Chasma, Valles Marineris region of Mars: U.S. Geological Survey Scientific Investigations Map 3359, pamphlet 12 p., scale 1:18,000, https://doi.org/10.3133/sim3359.

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Year Published: 2017

Variable terrestrial GPS telemetry detection rates: Addressing the probability of successful acquisitions

Studies using global positioning system (GPS) telemetry rarely result in 100% fix success rates (FSR), which may bias datasets because data loss is systematic rather than a random process. Previous spatially explicit models developed to correct for sampling bias have been limited to small study areas, a small range of data loss, or were study-area...

Ironside, Kirsten E.; Mattson, David J.; Choate, David; Stoner, David; Arundel, Terence R.; Hansen, Jered R.; Theimer, Tad; Holton, Brandon; Jansen, Brian; Sexton, Joseph O.; Longshore, Kathleen M.; Edwards, Thomas C.; Peters, Michael
Ironside, K.E., Mattson, D.J., Choate, D., Stoner, D., Arundel, T.R., Hansen, J., Theimer, T.C., Holton, B., Jansen, B.D., Sexton, J.O., Longshore, K., Edwards, T.C., Jr., and Peters, M., 2017, Variable terrestrial GPS telemetry detection rates--Addressing the probability of successful acquisitions: Wildlife Society Bulletin, 2017, early online view, http://onlinelibrary.wiley.com/doi/10.1002/wsb.758/epdf and http://dx.doi.org/10.1002/wsb.758.

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Year Published: 2017

Geophysical data collected during the 2014 minute 319 pulse flow on the Colorado River below Morelos Dam, United States and Mexico

Geophysical methods were used to monitor infiltration during a water release, referred to as a “pulse flow,” in the Colorado River delta in March and April 2014. The pulse flow was enabled by Minute 319 of the 1944 United States–Mexico Treaty concerning water of the Colorado River. Fieldwork was carried out by the U.S. Geological Survey and the...

Kennedy, Jeffrey R.; Callegary, James B.; Macy, Jamie P.; Reyes-Lopez, Jaime; Pérez-Flores, Marco
Kennedy, J.R., Callegary, J.B., Macy, J.P., Reyes-Lopez, J., Pérez-Flores, M., 2017, Geophysical data collected during the 2014 minute 319 pulse flow on the Colorado River below Morelos Dam, United States and Mexico: U.S. Geological Survey Open-File Report 2017–1050, 48 p., https://doi.org/10.3133/ofr20171050.

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Year Published: 2017

Developing an effective Agassiz's Desert Tortoise monitoring program: Final report to the Coachella Valley Conservation Commission

Agassiz’s desert tortoise (Gopherus agassizii) is a conservation-reliant species with populations north and west of the Colorado River protected as threatened under the Endangered Species Act (Averill-Murray et al. 2012). Since it was listed under this category in 1990, a great deal has been learned about the natural history of the species, and it...

Lovich, Jeffrey E.; Puffer, Shellie R.
Lovich, J.E., and Puffer, S.R., 2017, Developing an effective Agassiz's desert tortoise monitoring program—Final Report to Coachella Valley Conservation Commission: Sacramento, Calif., U.S. Geological Survey, submitted to California Dept. of Fish and Wildlife, Coachella Valley Multiple Species Habitat Conservation Plan & Natural Community Conservation Plan, 26 p., https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=152890&inline.

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Year Published: 2017

Diagenetic silica enrichment and late-stage groundwater activity in Gale crater, Mars

Diagenetic silica enrichment in fracture-associated halos that crosscut lacustrine and unconformably overlying aeolian sedimentary bedrock is observed on the lower north slope of Aeolis Mons in Gale crater, Mars. The diagenetic silica enrichment is colocated with detrital silica enrichment observed in the lacustrine bedrock yet extends into a...

Frydenvang, Jens; Gasda, Patrick J.; Hurowitz, Joel A.; Grotzinger, John P.; Wiens, Roger C.; Newsom, Horton E.; Edgett, Ken S.; Watkins, Jessica; Bridges, John C.; Maurice, Sylvestre; Fisk, Martin R.; Johnson, Jeffrey R.; Rapin, William; Stein, Nathan; Clegg, Sam M.; Schwenzer, S. P.; Bedford, C.; Edwards, P.; Mangold, Nicolas; Cousin, Agnes; Anderson, Ryan; Payre, Valerie; Vaniman, David; Blake, David; Lanza, Nina L.; Gupta, Sanjeev; Van Beek, Jason K.; Sautter, Violaine; Meslin, Pierre-Yves; Rice, Melissa; Milliken, Ralf; Gellert, Ralf; Thompson, Lucy; Clark, Ben C.; Sumner, Dawn Y.; Fraeman, Abigail A.; Kinch, Kjartan M; Madsen, Morten B.; Mitofranov, Igor; Jun, Insoo; Calef, Fred J.; Vasavada, Ashwin R.
Frydenvang, J., et al. (2017), Diagenetic silica enrichment and late-stage groundwater activity in Gale crater, Mars, Geophys. Res. Lett., 44, 4716–4724, doi:10.1002/2017GL073323.

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Year Published: 2017

Temporal variability of foliar nutrients: responses to nitrogen deposition and prescribed fire in a temperate steppe

Plant nutrient concentrations and stoichiometry drive fundamental ecosystem processes, with important implications for primary production, diversity, and ecosystem sustainability. While a range of evidence exists regarding how plant nutrients vary across spatial scales, our understanding of their temporal variation remains less well understood....

Lü, Xiao-Tao; Reed, Sasha C.; Hou, Shuang-Li; Hu, Yan-Yu; Wei, Hai-Wei; Lü, Fu-Mei; Cui, Qiang; Han, Xing Guo
Lü, X.-T., Reed S., Hou, S.-L., Hu, Y.-Y., Wei, H.-W., Lü, F.-M., Cui, Q., and Han, X.-G., 2017, Temporal variability of foliar nutrients: responses to nitrogen deposition and prescribed fire in a temperate steppe: Biogeochemistry, v. 133, no. 3, p. 295-305, http://dx.doi.org/10.1007/s10533-017-0333-x.

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Year Published: 2017

Geologic map of Meridiani Planum, Mars

Introduction and BackgroundThe Meridiani Planum region of Mars—originally named due to its proximity to the Martian prime meridian—contains a variety of geologic units, including those that are crater‑related, that span the Early Noachian to Late Amazonian Epochs. Mars Global Surveyor (MGS) data indicate this area contains extensive layered...

Hynek, Brian M.; Di Achille, Gaetano
Hynek, B.M., and Di Achille, G., 2017, Geologic map of Meridiani Planum, Mars (ver. 1.1, April 2017): U.S. Geological Survey Scientific Investigations Map 3356, pamphlet 9 p., scale 1:2,000,000, https://doi.org/10.3133/sim3356.

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Year Published: 2017

Reptiles and amphibians

Summary – We reviewed all the peer-reviewed scientific publications we could find on the known and potential effects of wind farm development, operation, maintenance, and decommissioning on reptiles and amphibians (collectively herpetofauna) worldwide. Both groups are declining globally due to a multitude of threats including energy development....

Perrow, Martin; Lovich, Jeffrey E.; Ennen, Joshua R.
Lovich, J.E., and Ennen, J.R., 2017, Reptiles and Amphibians, in Perrow, M., ed., Wildlife and wind farms – conflicts and solutions: Exeter, U.K., vol. 1, p. 97-118, https://pelagicpublishing.com/collections/wildlife-and-wind-farms-martin-perrow/products/wildlife-and-wind-farms-vol-1-onshore-potential-effects.

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Year Published: 2017

Feasibility study for the quantitative assessment of mineral resources in asteroids

This study was undertaken to determine if the U.S. Geological Survey’s process for conducting mineral resource assessments on Earth can be applied to asteroids. Successful completion of the assessment, using water and iron resources to test the workflow, has resulted in identification of the minimal adjustments required to conduct full resource...

Keszthelyi, Laszlo P.; Hagerty, Justin J.; Bowers, Amanda; Ellefsen, Karl J.; Ridley, Ian; King, Trude; Trilling, David; Moskovitz, Nicholas; Grundy, Will

Filter Total Items: 239
Image: Black-necked Stilt Anti-predator Behavior
June 14, 2006

Black-necked Stilt Anti-predator Behavior

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Black-necked Stilt Anti-predator Behavior
June 14, 2006

Black-necked Stilt Anti-predator Behavior

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Killdeer
June 8, 2006

Killdeer

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Black-necked Stilt Chick with Radio Telemetry Package
June 8, 2006

Black-necked Stilt Chick with Radio Telemetry Package

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Killdeer
June 8, 2006

Killdeer

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Black-necked Stilt Chick with Radio Telemetry Package
June 5, 2006

Black-necked Stilt Chick with Radio Telemetry Package

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Cattle Egret
May 23, 2006

Cattle Egret

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Great Blue Heron and Northern Pintail
May 23, 2006

Great Blue Heron and Northern Pintail

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Eared Grebe Breeding Plumage
May 23, 2006

Eared Grebe Breeding Plumage

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Killdeer
May 23, 2006

Killdeer

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Western Snowy Plover
May 17, 2006

Western Snowy Plover

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Killdeer on Nest
May 10, 2006

Killdeer on Nest

Birds found in and around the Salton Sea, California.

Attribution: Southwest

Nine USGS Science Centers are administered by the Pacific Regional office, which is headquartered in Sacramento, California.