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Southwest

Regions L2 Landing Page Tabs

Filter Total Items: 2,184
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Year Published: 2017

Building capacity in biodiversity monitoring at the global scale

Human-driven global change is causing ongoing declines in biodiversity worldwide. In order to address these declines, decision-makers need accurate assessments of the status of and pressures on biodiversity. However, these are heavily constrained by incomplete and uneven spatial, temporal and taxonomic coverage. For instance, data from regions...

Schmeller, Dirk S.; Bohm, Monika; Arvanitidis, Christos; Barber-Meyer, Shannon; Brummitt, Neil; Chandler, Mark; Chatzinikolaou, Eva; Costello, Mark John; Ding, Hui; García-Moreno, Jaime; Gill, Michael J.; Haase, Peter; Jones, Miranda; Juillard, Romain; Magnusson, William E.; Martin, Corinne S.; McGeoch, Melodie A.; Mihoub, Jean-Baptiste; Pettorelli, Nathalie; Proença, Vânia; Peng, Cui; Regan, Eugenie; Schmiedel, Ute; Simsika, John P.; Weatherdon, Lauren; Waterman, Carly; Xu, Haigen; Belnap, Jayne
Schmeller, D.S., Böhm, M., Arvanitidis, C., Barber-Meyer, S., Brummitt, N., Chandler, M., Chatzinikolaou, E., Costello, J.J., Ding, H., Garcia-Moreno, J., Gill, M., Haase, P., Jones, M., Julliard, R., Magnusson, W.E., Martin, C.S., McGeoch, M., Mihoub, J-B., Pettorelli, N., Proenca, V., Peng, C., Regan, E., Schmiedel, U., Simaika, J.P., Weatherdon, L., Waterman, C., Xu, H., Belnap, J., 2017, Building capacity in biodiversity monitoring at the global scale: Biodiversity and Conservation, v. 26, no. 12, p. 2765-2790, http://dx.doi.org/10.1007/s10531-017-1388-7.

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Year Published: 2017

Short-term and long-term evapotranspiration rates at ecological restoration sites along a large river receiving rare flow events

Many large rivers around the world no longer flow to their deltas, due to ever greater water withdrawals and diversions for human needs. However, the importance of riparian ecosystems is drawing increasing recognition, leading to the allocation of environmental flows to restore river processes. Accurate estimates of riparian plant...

Shanafield, Margaret; Jurado, Hugo Gutierrez; Burgueño, Jesús Eliana Rodríguez; Hernández, Jorge Ramírez; Jarchow, Christopher; Nagler, Pamela L.
Shanafield, Margaret, Hugo Gutierrez Jurado, , J. Eliana Rodriguez-Burgueño,, Jorge Ramírez-Hernández,, Christopher J. Jarchow, Pamela L .Nagler, (2017). Short-term and long-term evapotranspiration rates at ecological restoration sites along a large river receiving rare flow events. Hydrological Processes. . 10.1002/hyp.11359.

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Year Published: 2017

The concurrent use of novel soil surface microclimate measurements to evaluate CO2 pulses in biocrusted interspaces in a cool desert ecosystem

Carbon cycling associated with biological soil crusts, which occupy interspaces between vascular plants in drylands globally, may be an important part of the coupled climate-carbon cycle of the Earth system. A major challenge to understanding CO2 fluxes in these systems is that much of the biotic and biogeochemical activity occurs in the...

Tucker, Colin; McHugh, Theresa A.; Howell, Armin J.; Gill, Richard; Weber, Bettina; Belnap, Jayne; Grote, Edmund E.; Reed, Sasha C.
Tucker, C.L., McHugh, T.A., Howell, A., Gill, R., Weber, B., Belnap, J., Grote, E., and Reed, S.C., 2017, The concurrent use of novel soil surface microclimate measurements to evaluate CO2 pulses in biocrusted interspaces in a cool desert ecosystem: Biogeochemistry, v. 135, no. 3, p. 239-249, http://dx.doi.org/10.1007/s10533-017-0372-3.

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Year Published: 2017

Compositional signatures in acoustic backscatter over vegetated and unvegetated mixed sand-gravel riverbeds

Multibeam acoustic backscatter has considerable utility for remote characterization of spatially heterogeneous bed sediment composition over vegetated and unvegetated riverbeds of mixed sand and gravel. However, the use of high-frequency, decimeter-resolution acoustic backscatter for sediment classification in shallow water is hampered by...

Buscombe, Daniel; Grams, Paul E.; Kaplinski, Matthew A.
Buscombe, D., Grams, P.E., and Kaplinski, M.A., 2017, Compositional signatures in acoustic backscatter over vegetated and unvegetated mixed sand-gravel riverbeds: Journal of Geophysical Research Earth Surface, v. (online), http://dx.doi.org/10.1002/2017JF004302.

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Year Published: 2017

Durable terrestrial bedrock predicts submarine canyon formation

Though submarine canyons are first-order topographic features of Earth, the processes responsible for their occurrence remain poorly understood. Potentially analogous studies of terrestrial rivers show that the flux and caliber of transported bedload are significant controls on bedrock incision. Here we hypothesize that coarse sediment load could...

Smith, Elliot; Finnegan, Noah J.; Mueller, Erich R.; Best, Rebecca J.
Smith, E.M., Finnegan, N.J., Mueller, E.R., and Best, R.J., 2017, Durable Terrestrial Bedrock Predicts Submarine Canyon Formation: Geophysical Research Letters, v. (online), http://dx.doi.org/10.1002/2017GL075139.

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Year Published: 2017

Martian cave air-movement via Helmholtz resonance

Infrasonic resonance has previously been measured in terrestrial caves by other researchers, where Helmholtz resonance has been suggested as the plausible mechanism resulting in periodic wind reversals within cave entrances. We extend this reasoning to possible Martian caves, where we examine the characteristics of four atypical pit craters (APCs...

Williams, Kaj; Titus, Timothy N.; Okubo, Chris; Cushing, Glen E.
Williams, Kaj E.; Timothy N. Titus; Chris H. Okubo; and Glen E. Cushing. 2017. Martian cave air-movement via Helmholtz resonance. International Journal of Speleology, 46: 439-444.

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Year Published: 2017

Taxonomic and compositional differences of ground-dwelling arthropods in riparian habitats in Glen Canyon, Arizona, USA

The disturbance history, plant species composition, productivity, and structural complexity of a site can exert bottom-up controls on arthropod diversity, abundance, and trophic structure. Regulation alters the hydrology and disturbance regimes of rivers and affects riparian habitats by changing plant quality parameters. Fifty years of regulation...

Ralston, Barbara; Cobb, Neil S.; Brantley, Sandra L.; Higgins, Jacob; Yackulic, Charles B.
Ralston, B.E., Cobb, N.S., Brantley, S.L., Higgins, J., and Yackulic, C.B., 2017, Taxonomic and compositional differences of ground-dwelling arthropods in riparian habitats in Glen Canyon, Arizona, USA: Western North American Naturalist, v. 77, no. 3, p.369-384, http://scholarsarchive.byu.edu/wnan/vol77/iss3/8.

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Year Published: 2017

The interior structure of Ceres as revealed by surface topography

Ceres, the largest body in the asteroid belt (940 km diameter), provides a unique opportunity to study the interior structure of a volatile-rich dwarf planet. Variations in a planetary body's subsurface rheology and density affect the rate of topographic relaxation. Preferential attenuation of long wavelength topography (≥150 km) on Ceres suggests...

Fu, Roger R.; Ermakov, Anton; Marchi, Simone; Castillo-Rogez, Julie C.; Raymond, Carol A.; Hager, Bradford; Zuber, Maria; King, Scott D.; Bland, Michael T.; De Sanctis, Maria Cristina; Preusker, Frank; Park, Ryan S.; Russell, Christopher T.

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Year Published: 2017

Concentration and trend of 1,4-dioxane in wells sampled during 2002–2017 in the vicinity of the Tucson International Airport Area Superfund Site, Arizona

Industrial activities causing extensive groundwater contamination led to the listing of the Tucson International Airport Area (TIAA) as a Superfund Site in 1983. Early groundwater investigations identified volatile organic compounds (VOCs), including the chlorinated solvents trichloroethylene (TCE) and perchloroethylene (PCE), in wells in the area...

Tillman, Fred D.
Tillman, Fred, 2017, Concentration and trend of 1,4-dioxane in wells sampled during 2002–2017 in the vicinity of the Tucson International Airport Area Superfund Site: U.S. Geological Survey Scientific Investigations Map 3385, scale 1:7,500, 1 sheet, https://doi.org/10.3133/sim3385.

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Year Published: 2017

Pitted terrains on (1) Ceres and implications for shallow subsurface volatile distribution

Prior to the arrival of the Dawn spacecraft at Ceres, the dwarf planet was anticipated to be ice-rich. Searches for morphological features related to ice have been ongoing during Dawn's mission at Ceres. Here we report the identification of pitted terrains associated with fresh Cerean impact craters. The Cerean pitted terrains exhibit strong...

Sizemore, H.G.; Platz, Thomas; Schorghofer, Norbert; Prettyman, Thomas; De Sanctis, Maria Christina; Crown, David A.; Schmedemann, Nico; Nessemann, Andeas; Kneissl, Thomas; Simone Marchi; Schenk, Paul M.; Bland, Michael T.; Schmidt, B.E.; Hughson, Kynan H.G.; Tosi, F.; Zambon, F; Mest, S.C.; Yingst, R.A.; Williams, D.A.; Russell, C.T.; Raymond, C.A.
Sizemore, H. G., et al. (2017), Pitted terrains on (1) Ceres and implications for shallow subsurface volatile distribution, Geophys. Res. Lett., 44, 6570-6578, doi:10.1002/2017GL073970

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Year Published: 2017

Fine-resolution repeat topographic surveying of dryland landscapes using UAS-based structure-from-motion photogrammetry: Assessing accuracy and precision against traditional ground-based erosion measurements

Structure-from-motion (SfM) photogrammetry from unmanned aerial system (UAS) imagery is an emerging tool for repeat topographic surveying of dryland erosion. These methods are particularly appealing due to the ability to cover large landscapes compared to field methods and at reduced costs and finer spatial resolution compared to airborne laser...

Gillian, Jeffrey K.; Karl, Jason W.; Elaksher, Ahmed; Duniway, Michael C.
Gillan, J.K., Karl, J.W., Elaksher, A., and Duniway, M.C., 2017, Fine-resolution repeat topographic surveying of dryland landscapes using UAS-based structure-from-motion photogrammetry—Assessing accuracy and precision against traditional ground-based erosion measurements: Remote Sensing, v. 9, no. 5, http://dx.doi.org/10.3390/rs9050437.

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Year Published: 2017

Selection of the InSight landing site

The selection of the Discovery Program InSight landing site took over four years from initial identification of possible areas that met engineering constraints, to downselection via targeted data from orbiters (especially Mars Reconnaissance Orbiter (MRO) Context Camera (CTX) and High-Resolution Imaging Science Experiment (HiRISE) images), to...

Golombek, M.; Kipp, D.; Warner, N.; Daubar, Ingrid J.; Fergason, Robin L.; Kirk, Randolph L.; Beyer, R.; Huertas, A.; Piqueux, Sylvain; Putzig, N.E.; Campbell, B.A.; Morgan, G. A.; Charalambous, C.; Pike, W. T.; Gwinner, K.; Calef, F.; Kass, D.; Mischna, M. A.; Ashley, J.; Bloom, C.; Wigton, N.; Hare, T.; Schwartz, C.; Gengl, H.; Redmond, L.; Trautman, M.; Sweeney, J.; Grima, C.; Smith, I. B.; Sklyanskiy, E.; Lisano, M.; Benardini, J.; Smrekar, S.E.; Lognonne, P.; Banerdt, W. B.

Filter Total Items: 239
Image: Snowy Egret
April 16, 2008

Snowy Egret

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Snowy Egret
April 16, 2008

Snowy Egret

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Marbled Gowit
March 20, 2008

Marbled Gowit

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: California Brown Pelicans
March 20, 2008

California Brown Pelicans

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Double Crested Cormorants
March 20, 2008

Double Crested Cormorants

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: White-faced Ibis and Gulls
March 6, 2008

White-faced Ibis and Gulls

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: White-faced Ibis and Gulls
March 6, 2008

White-faced Ibis and Gulls

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Double Crested Cormorants
March 6, 2008

Double Crested Cormorants

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: White Pelicans
March 6, 2008

White Pelicans

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: White Pelicans
March 6, 2008

White Pelicans

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: White Pelicans
March 6, 2008

White Pelicans

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: White Pelicans
March 6, 2008

White Pelicans

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.