A5011490697- Groundwater and Isotope Geochemistry
- Water Quality and Resources Studies
- Groundwater flow and contamination studies
- Radioactive contamination and transfer
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Radioactivity and Radon Measurements
- Climate change and permafrost
- Isotope Analysis in Ecology
- Nuclear and radioactivity studies
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Mercury impact and mitigation studies
- Geochemistry and Geologic Mapping
- Nuclear Physics and Applications
- Space exploration and regulation
- Climate variability and models
- Spacecraft Design and Technology
- Climate change impacts on agriculture
- Precipitation Measurement and Analysis
- Hydrology and Watershed Management Studies
- Meteorological Phenomena and Simulations
- Geophysical Methods and Applications
- Landslides and related hazards
- Systems Engineering Methodologies and Applications
NOAA Center for Satellite Applications and Research
2017
University of California, Irvine
2014
NOAA National Centers for Environmental Information
2011-2014
North Carolina State University
2014
Cooperative Institute for Climate and Satellites
2014
Global Science & Technology (United States)
2013-2014
United States Geological Survey
1998-2011
National Science Foundation Ice Core Facility
2002
Idaho National Laboratory
1992-1997
Abstract A new retrospective satellite-based precipitation dataset is constructed as a climate data record for hydrological and studies. Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks–Climate Data Record (PERSIANN-CDR) provides daily 0.25° rainfall estimates the latitude band 60°S–60°N period of 1 January 1983 to 31 December 2012 (delayed present). PERSIANN-CDR aimed at addressing need consistent, long-term, high-resolution, global studying changes...
Mercury (Hg) contamination of aquatic ecosystems and subsequent methylmercury bioaccumulation are significant environmental problems global extent. At regional to scales, the primary mechanism Hg is atmospheric transport. Thus, a better understanding long-term history cycling quantification sources critical for assessing impact anthropogenic emissions. Ice cores collected from Upper Fremont Glacier (UFG), Wyoming, contain high-resolution record total deposition (ca. 1720-1993). Total in 97...
Climate change is projected to push the limits of cropping systems and has potential disrupt agricultural sector from local global scales. This article introduces Coordinated Climate-Crop Modeling Project (C3MP), an initiative Agricultural Model Intercomparison Improvement (AgMIP) engage a network crop modelers explore impacts climate via investigation responses changes in carbon dioxide concentration ([CO2 ]), temperature, water. As demonstration C3MP protocols enabled analyses, we apply...
Stable water isotope (δ 18 O, δD) data from a high elevation (5100 masl) ice core recovered the Tien Shan Mountains, Kyrgyzstan, display seasonal cycle in deuterium excess ( d = δD − 8*δ O) related to changes regional hydrologic during 1994–2000. While there is strong correlation (r 2 0.98) between δ O and samples, regression slope (6.9) mean value (23.0) are significantly different than global meteoric line values. The resulting time‐series profile contains distinct winter maxima summer...
Glacioclimatological research in the central Tien Shan was performed summers of 1998 and 1999 on South Inilchek Glacier at 5100–5460 m. A 14.36 m firn‐ice core snow samples were collected used for stratigraphic, isotopic, chemical analyses. The records related to pit measurements an event scale meteorological data synoptic indices atmospheric circulation annual seasonal scales. Linear relationships between air temperature isotopic composition accumulated precipitation established. Changes δ...
Abstract Oxygen isotopic and soluble ionic measurements made on snow-pit (2 m depth) firn-core (12.4 samples recovered from the accumulation zone (5100 m) of Inilchek glacier (43° N, 79° E) provide information recent (1992–98) climatic environmental conditions in central Tien Shan region Asia. The combined 14.4 snow-pit/firn-core profile lies within firn zone, contains only one observed melt feature (10 temperature = −12°C). Although some post-depositional attenuation sub-seasonal δ 18 O...
Site‐specific transfer functions relating delta oxygen 18 (δ O) values in snow to the average air temperature ( T A ) during storms on Upper Fremont Glacier (UFG) were used conjunction with δ O records from UFG ice cores reconstruct long‐term trends alpine areas Wind River Range, Wyoming. Transfer determined by using data collected four seasonal snowpacks (1989–1990, 1997–1998, 1998–1999, and 1999–2000). The timing amount of each storm was an automated snowpack telemetry (SNOTEL) site, 22 km...
Preferential flow paths are expected in many groundwater systems and must be located because they can greatly affect contaminant transport.The fundamental characteristics of radiogenic isotope ratios chemically evolving waters make them highly effective as preferential path indicators.These tend to more easily interpreted than solute-concentration data their response water-rock interaction is less complex.We demonstrate this approach with 87 Sr/ 86 Sr the Snake River Plain aquifer within...
Linear-regression analysis was applied to stable hydrogen (H) and oxygen (O) isotope data in 72 snow-core precipitation samples collected during 1999-2001 determine the Local Meteoric Water Line (LMWL) for southeastern Idaho, western Wyoming, south-central Montana. On basis of (1) residuals from regression model, (2) comparison study-area deuterium-excess (d-excess) values with global range d-excess values, (3) outlier by means Chauvenet's Criterion, four were excluded final dataset....
The potential to use ice cores from alpine glaciers in the midlatitudes reconstruct paleoclimatic records has not been widely recognized. Although excellent exist for polar regions, core are common midlatitude locations. An removed Upper Fremont Glacier Wyoming provides evidence abrupt climate change during mid‐1800s. Volcanic events (Krakatau and Tambora) identified electrical conductivity measurements (ECM) isotopic chemical data were reexamined confirm refine previous chronological...
Abstract Between 1952 and 1984, low‐level radioactive waste was introduced directly into the Snake River Plain aquifer at Idaho National Engineering Laboratory (INEL), Falls, Idaho. These wastes were generated, principally, nuclear fuel reprocessing facility on site. Our measurements of 36C1 in monitoring production well waters, downgradient from disposal wells seepage ponds, found easily detectable, nonhazardous concentrations this radionuclide point injection to INEL southern site...
Meltwater runoff from glaciers can result various sources, including recent precipitation and melted glacial ice. Determining the origin of meltwater through isotopic analysis provide information about such things as character distribution ablation on glaciers.A 9.4 m ice core were collected in 1995 1996 at glacigenic Galena Creek rock glacier Wyoming's Absaroka Mountains. Measurements chlorine‐36 (36Cl), tritium (3H), sulphur‐35 (35S), delta oxygen‐18 (δ18O) compared to similar measurements...
This chapter is the ninth to be released in U.S. Geological Survey Professional Paper 1386, Satellite Image Atlas of Glaciers World, a series 11 chapters. In each geographic area chapters, remotely sensed images, primarily from Landsat 1, 2, and 3 spacecraft, are used analyze specific glacierized region our planet under consideration monitor glacier changes. acquired during middle late 1970s early 1980s, were by an international team glaciologists other scientists study various regions (or)...