A5010896919- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Hydraulic Fracturing and Reservoir Analysis
- Groundwater flow and contamination studies
- Reservoir Engineering and Simulation Methods
- Landslides and related hazards
- Geothermal Energy Systems and Applications
- Climate change and permafrost
- Nuclear reactor physics and engineering
- Hydrocarbon exploration and reservoir analysis
- Pleistocene-Era Hominins and Archaeology
- Nuclear and radioactivity studies
- Groundwater and Isotope Geochemistry
- Geological formations and processes
- Drilling and Well Engineering
- Graphite, nuclear technology, radiation studies
- CO2 Sequestration and Geologic Interactions
- Nuclear Materials and Properties
- Isotope Analysis in Ecology
- Soil and Unsaturated Flow
- Rock Mechanics and Modeling
- Atmospheric and Environmental Gas Dynamics
- Forest Biomass Utilization and Management
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Silicon Carbide Semiconductor Technologies
Idaho National Laboratory
2015-2025
Weatherford College
2013
New Mexico Institute of Mining and Technology
1996-2009
Bechtel (United States)
2004
Los Alamos National Laboratory
1997
Desert Research Institute
1997
Purdue University West Lafayette
1997
ExxonMobil (United States)
1981
Mountain glaciers, because of their small size, are usually close to equilibrium with the local climate and thus should provide a test whether temperature oscillations in Greenland late last glacial period part global-scale variability or restricted North Atlantic region. Correlation cosmogenic chlorine-36 dates on Sierra Nevada moraines continuous radiocarbon-dated sediment record from nearby Owens Lake shows that advances were associated Heinrich events 5, 3, 2, 1.
Quantifying moisture fluxes through deep desert soils remains difficult because of the small magnitude and lack a comprehensive model to describe flow transport such dry material. A particular challenge for is reproducing both observed matric potential chloride profiles. We propose conceptual in vadose zones that includes isothermal nonisothermal vapor role vegetation supporting net upward flux below root zone. Numerical simulations incorporating this match typical The modeling approach...
Research Article| July 01, 2009 Glacial geology and chronology of Bishop Creek vicinity, eastern Sierra Nevada, California Fred M. Phillips; Phillips † 1Earth & Environmental Science Department, New Mexico Tech, Socorro, 87801, USA †E-mail: phillips@nmt.edu. Search for other works by this author on: GSW Google Scholar Marek Zreda; Zreda 2Department Hydrology Water Resources, University Arizona, Tucson, Arizona 85712, Mitchell A. Plummer; Plummer §Current address: Idaho National Laboratory,...
During the last glacial maximum (LGM), western Uinta Mountains of northeastern Utah were occupied by Western Ice Field. Cosmogenic 10 Be surface-exposure ages from terminal moraine in North Fork Provo Valley and paired 26 Al striated bedrock at Bald Mountain Pass set limits on timing local LGM. Moraine boulder suggest that ice reached its extent 17.4±0.5 ka (± 2σ). measurements Pass, situated near former center field, yield a mean Al/ ratio 5.7±0.8 exposure age 14.0±0.5 ka, which places...
Knowledge of the production history cosmogenic nuclides, which is needed for geological and archaeological dating, has been uncertain. Measurements chlorine-36/chlorine ( 36 Cl/Cl) ratios in fossil packrat middens from Nevada that are radiocarbon-dated between about 38 thousand years ago (ka) present showed Cl/Cl were higher by a factor 2 before ∼11 ka. This raises possibility rates just close Pleistocene up to 50% than suggested carbon-14 calibration data. The discrepancy could be explained...
Glaciers respond to climate variations and leave geomorphic evidence that represents an important terrestrial paleoclimate record. However, the accuracy of reconstructions from glacial geology is limited by challenge representing mountain meteorology in numerical models. Precipitation usually treated a simple manner yet difficult-to-characterize variables such as amount, distribution, phase. Furthermore, precipitation distributions during probably differed present-day interglacial patterns....
It is widely believed that the last glaciers in British Isles disappeared at end of Younger Dryas stadial (12.9–11.7 cal. kyr BP). Here, we use a glacier–climate model driven by data from local weather stations to show for first time developed during Little Ice Age (LIA) Cairngorm Mountains. Our forced contemporary conditions realistic difference mean annual air temperature −1.5°C and an increase precipitation 10%, confirmed sensitivity analyses. These results are supported presence small...
Research Article| July 12, 2018 Termination II, Last Glacial Maximum, and Lateglacial chronologies paleoclimate from Big Cottonwood Canyon, Wasatch Mountains, Utah Brendon J. Quirk; Quirk † 1Department of Geology Geophysics, University Utah, Salt Lake City, 84112, USA †brendon.quirk@utah.edu Search for other works by this author on: GSW Google Scholar Jeffrey R. Moore; Moore Benjamin J.C. Laabs; Laabs 2Department Geosciences, North Dakota State University, Fargo, 68102, Marc W. Caffee;...
Pretreatment and densification of biomass can increase the viability bioenergy production by providing a feedstock that is readily hydrolyzed able to be transported over greater distances. Ammonia fiber expansion (AFEX™) one such method targeted for use at distributed depots create value-added densified use. However, pretreatment process results in high-moisture material must dried, further size reduced, pelletized, all which are energy-intensive processes. This work quantifies energy...
Abstract. The geologic record of mountain glaciations is a robust indicator terrestrial paleoclimate change. During the last glaciation, ranges across western US hosted glaciers while Cordilleran and Laurentide ice sheets flowed to west east continental divide, respectively. Records detailing chronologies significance these advances have been developed for many sites North America. However, relatively few glacial records in northern Rocky Mountains near former sheet margins. Here, we report...
Research Article| February 01, 2013 Drainage capture and discharge variations driven by glaciation in the Southern Alps, New Zealand Ann V. Rowan; Rowan 1School of Earth, Atmospheric Environmental Sciences, University Manchester, Manchester M13 9PL, UK *Current address: Institute Geography Earth Aberystwyth University, SY23 3DB, UK. Search for other works this author on: GSW Google Scholar Mitchell A. Plummer; Plummer 2Idaho National Laboratory, Idaho Falls, 83415-2107, USA Simon H....
Abstract Ground surface deformations detected with interferometric synthetic aperture radar provide valuable information for inferring subsurface reservoir processes that are difficult to observe directly. This study aims at building a model honors the available geological, hydrological, and geomechanical data also produces ground deformation consistent measurements Raft River Geothermal Field. In thermo‐hydro‐mechanical coupled developed, deforms as result of rock's poroelastic response...
Abstract Well-preserved moraines from the penultimate, or Bull Lake, glaciation of Snowmass Creek Valley in Elk Range Colorado (USA) present an opportunity to examine character high-altitude climate Rocky Mountains during Marine Oxygen Isotope Stage 6. This study employs a 2-D coupled mass/energy balance and flow model assess magnitudes temperature precipitation change that could have sustained glacier mass-balance equilibrium at its maximum extent Lake glaciation. Variable substrate effects...
Abstract In North America, terrestrial records of biodiversity and climate change that span Marine Oxygen Isotope Stage (MIS) 5 are rare. Where found, they provide insight into how the coupling ocean–atmosphere system is manifested in biotic environmental biosphere responds to change. 2010–2011, construction at Ziegler Reservoir near Snowmass Village, Colorado (USA) revealed a nearly continuous, lacustrine/wetland sedimentary sequence preserved evidence past plant communities between ~140 55...