A5045046117- Climate change and permafrost
- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Arctic and Antarctic ice dynamics
- Methane Hydrates and Related Phenomena
- Geophysical Methods and Applications
- Archaeology and Natural History
- Geochemistry and Geologic Mapping
- Geological Studies and Exploration
- Rangeland and Wildlife Management
- Advanced Fiber Optic Sensors
- Advanced Optical Sensing Technologies
- NMR spectroscopy and applications
- Aeolian processes and effects
- Seismic Waves and Analysis
- Forest Biomass Utilization and Management
- Microwave Imaging and Scattering Analysis
- Seismic Imaging and Inversion Techniques
- earthquake and tectonic studies
- Hydrocarbon exploration and reservoir analysis
- Ecology and biodiversity studies
- Earthquake Detection and Analysis
- Fire effects on ecosystems
- Underwater Acoustics Research
- Indigenous Studies and Ecology
University of Wyoming
2016-2021
Wyoming Department of Education
2015-2016
Clemson University
2012
Abstract Lakes and drained lake basins (DLBs) together cover up to ∼80% of the western Arctic Coastal Plain Alaska. The formation drainage lakes in this continuous permafrost region drive spatial temporal landscape dynamics. Postdrainage processes including vegetation succession aggradation have implications for hydrology, carbon cycling, evolution. Here, we used surface nuclear magnetic resonance (NMR) transient electromagnetic (TEM) measurements conjunction with thermal modeling...
Lakes in Arctic systems contribute to hydrologic storage, biogeochemical cycling, and permafrost thaw. Here, we have used surface nuclear magnetic resonance (NMR) measurements on lakes of Alaska’s North Slope investigate the extent thaw below with different annual ice conditions. Our purpose is understand if lake conditions are related development thawed lakes. We investigated 10 two terrestrial control sites using NMR direct measurement under spring when nearly at its thickest. did not...
Abstract Thermokarst lakes are prevalent in Arctic coastal lowland regions and sublake permafrost degradation talik development contributes to greenhouse gas emissions by tapping the large carbon pool. Whereas lateral thermokarst lake expansion is readily apparent through remote sensing shoreline measurements, thawed sediment conditions growth difficult measure. Here we combine transient electromagnetic surveys with thermal modeling, backed up measured properties radiocarbon ages, reveal...
Strong winter warming has dominated recent patterns of climate change along the Arctic Coastal Plain (ACP) northern Alaska. The full impact arctic winters may be best manifest by freshwater ice growth and extent to which abundant shallow ACP lakes freeze solid with bedfast end winter. For example, conditions 2016–17 produced record low extents across ACP. In addition high air temperatures, causes varied from deep snow accumulation on Barrow Peninsula late season rainfall lake levels farther...
First posted October 29, 2021 For additional information, contact: Director, Colorado Water Science CenterU.S. Geological SurveyBox 25046, MS-415Denver, CO 80225-0046 The U.S. Survey, in cooperation with Springs Utilities, has collected topographic data annually since 2012 at 10 study areas along Fountain Creek, southeastern Colorado. were located between and the terminus of Creek Arkansas River Pueblo. purpose this report is to present elevation maps based on surveys 2020 change that...
San Marcos Pueblo (LA98) is a Rio Grande Classical and Colonial periods archaeological site. Located south of Santa Fe east the Cerrillos Hills, it was possibly one largest communities in southwest, but abandoned 1680 following Revolt. The original investigation took place 1915 by Nelson. most recent excavations were performed about 12 years ago University New Mexico American Museum Natural history. In order to study site structure while maintaining pueblo's features, Summer Applied...
A constant rate infiltration experiment was conducted in a homogeneous sand tank and monitored with time-lapse multi-channel ground-penetrating radar (GPR) to observe patterns associated wetting fronts dynamic hydrologic conditions. The measures 4 m × 2 is filled depth of 0.60m medium-grained river sand. equipped 16 individual drainage cells (1 1 m) two centrally located soil moisture probes embedded at depths 0.1 0.25 which logged ten second intervals. An irrigation grid controlled...