Geosciences and Environmental Change Science Center

Publications

Filter Total Items: 834
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Year Published: 2019

The dependence of hydroclimate projections in snow‐dominated regions of the western United States on the choice of statistically downscaled climate data

We assess monthly temperature and precipitation data produced by four statistically based techniques that were used to downscale general circulation models (GCMs) in the Climate Model Intercomparison Program Phase 5 (CMIP5) (Taylor et al., 2012). We drive a simple water-balance model with the downscaled data to demonstrate the effect of the...

Alder, Jay R.; Hostetler, Steven W.

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Year Published: 2019

Calcrete uranium deposits in the Southern High Plains, USA

The Southern High Plains (SHP) is a new and emerging U.S. uranium province. Here, uranyl vanadates form deposits in Pliocene to Pleistocene sandstone, dolomite, and limestone. Fifteen calcrete uranium occurrences are identified; two of these, the Buzzard Draw and Sulfur Springs Draw deposits, have combined in-place resources estimated at about 4...

Hall, Susan; Van Gosen, Bradley S.; Paces, James B.; Zielinski, Robert A.

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Year Published: 2019

Pleistocene and Holocene landscape development of the South Platte River Corridor, Northeastern Colorado

This report provides a synthesis of geologic mapping and geochronologic research along the South Platte River between the town of Masters and the city of Fort Morgan, northeastern Colorado. This work was undertaken to better understand landscape development along this part of the river corridor. The focus is on times of rapid change within the...

Berry, Margaret E.; Slate, Janet L.; Taylor, Emily M.
Berry, M.E., Slate, J.L., and Taylor, E.M., 2019, Pleistocene and Holocene landscape development of the South Platte River corridor, northeastern Colorado: U.S. Geological Survey Scientific Investigations Report 2019–5020, 22 p., https://doi.org/10.3133/sir20195020.

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Year Published: 2019

A landscape model of variable social-ecological fire regimes

Fire regimes are now recognized as the product of social processes whereby fire on any landscape is the product of human-generated drivers: climate change, historical patterns of vegetation manipulation, invasive species, active fire suppression, ongoing fuel management efforts, prescribed burning, and accidental ignitions. We developed a new...

Scheller, Robert M; Kretchun, Alec; Hawbaker, Todd; Henne, Paul D.

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Year Published: 2019

A stratigraphic approach to inferring depositional ages from detrital geochronology data

With the increasing use of detrital geochronology data for provenance analyses, we have also developed new constraints on the age of otherwise undateable sedimentary deposits. Because a deposit can be no older than its youngest mineral constituent, the youngest defensible detrital mineral age defines the maximum depositional age of the sampled bed...

Johnstone, Samuel A.; Schwartz, Theresa M.; Holm-Denoma, Christopher S.

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Year Published: 2019

Bioavailable iron production in airborne mineral dust: Controls by chemical composition and solar flux

A large part of oceanic biological production is limited by the scarcity of dissolved iron. Mineral dust aerosol, processed under acidic atmospheric conditions, is the primary natural source of bioavailable iron to oceanic life. However, synergistic and antagonistic effects of non-Fe-containing minerals on atmospheric...

Hettiarachchi, Eshani; Reynolds, Richard L.; Goldstein, Harland L.; Moskowitz, Bruce M.; Rubasinghege, Gayan

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Year Published: 2019

North-south dipole in winter hydroclimate in the western United States during the last deglaciation

During the termination of the last glacial period the western U.S. experienced exceptionally wet conditions, driven by changes in location and strength of the mid-latitude winter storm track. The distribution of modern winter precipitation is frequently characterized by a north-south wet/dry dipole pattern, controlled by interaction of the storm...

Hudson, Adam M.; Hatchett, Benjamin J.; Quade, Jay; Boyle, Douglas P.; Bassett, Scott D.; Ali, Guleed; De los Santos, Marie G.

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Year Published: 2019

Evidence for non-steady-state carbon emissions from snow-scoured alpine tundra

High-latitude warming is capable of accelerating permafrost degradation and the decomposition of previously frozen carbon. The existence of an analogous high-altitude feedback, however, has yet to be directly evaluated. We address this knowledge gap by coupling a radiocarbon-based model to 7 years (2008–2014) of continuous eddy covariance data...

Knowles, John F.; Blanken, Peter D. ; Lawrence, Corey; Williams, Mark W.

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Year Published: 2019

Historical background and current developments for mapping burned area from satellite Earth observation

Fire has a diverse range of impacts on Earth's physical and social systems. Accurate and up to date information on areas affected by fire is critical to better understand drivers of fire activity, as well as its relevance for biogeochemical cycles, climate, air quality, and to aid fire management. Mapping burned areas was traditionally done...

Chuvieco, Emilio; Mouillot, Flourent; van der Werf, Guido R.; San Miguel, Jesús; Tanasse, Mihai; Koutsias, Nikos; García, Mariano; Yebra, Marta; Padilla, Marc; Heil, Angelika; Hawbaker, Todd J.; Giglio, Louis

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Year Published: 2019

Geologic map of the Hartsel Quadrangle, Park County, Colorado

The Hartsel quadrangle sits nearly in the center of the complex South Park Laramide structural basin. Generally, the basin can be described as an asymmetrical down-faulted feature, dipping to the east. It is bounded by two northwest-trending uplifts: the Sawatch uplift to the west and the Front Range uplift to the east. The west-verging Elkhorn...

Barkmann, Peter E.; Houck, Karen J.; Dechesne, Marieke; Lovekin, Jonathan R.; Johnson, Erinn P.
Barkmann, Peter E., Karen J. Houck, Marieke Dechesne, Jonathan R. Lovekin, and Erinn P. Johnson. “OF-17-04 Geologic Map of the Hartsel Quadrangle, Park County, Colorado.” Geologic, 1:24,000. Open File Reports. Golden, CO: Colorado Geological Survey, 2019.

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Year Published: 2019

Reimagining the potential of Earth observations for ecosystem service assessments

The benefits nature provides to people, called ecosystem services, are increasingly recognized and accounted for in assessments of infrastructure development, agricultural management, conservation prioritization, and sustainable sourcing. These assessments are often limited by data, however, a gap with tremendous potential to be filled...

Ramirez-Reyes, Carlos; Brauman, Kate A.; Chaplin-Kramer, Rebecca; Galford, Gillian L.; Adamo, Susana B.; Anderson, Christopher B.; Anderson, Clarissa; Allington, Ginger R. H.; Bagstad, Kenneth J.; Coe, Michael T.; Cord, Anna F.; Dee, Laura E.; Gould, Rachelle K.; Jain, Meha; Kowal, Virginia A.; Muller-Karger, Frank E.; Norriss, Jessica; Potapov, Peter V.; Qui, Jiangxiao; Rieb, Jesse T.; Robinson, Brian E.; Samberg, Leah H.; Singh, Nagendra; Szeto, Sabrina H.; Voigt, Brian; Watson, Keri; Wright, T. Maxwell

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Year Published: 2019

The potential role of very high-resolution imagery to characterise lake, wetland and stream systems across the Prairie Pothole Region, United States

Aquatic features critical to watershed hydrology range widely in size from narrow, shallow streams to large, deep lakes. In this study we evaluated wetland, lake, and river systems across the Prairie Pothole Region to explore where pan-sharpened high-resolution (PSHR) imagery, relative to Landsat imagery, could provide additional data on surface...

Vanderhoof, Melanie K.; Lane, Charles R.