Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2354
Improving paleoecology studies for future predictions: Role of spatial and temporal scales for understanding ecology of the arid and semiarid landscape of the Southwest
Paleoecology (or ecological biogeography) describes the past distribution of species or communities and is an informative path used to understand the future in the face of climate change. Paleoecological changes in the Southwest over the past several thousand years happened in the presence of landscape manipulations by humans, a factor that adds relevance but increases difficulty of interpretation
Authors
David M. Miller, Gene-Hua Crystal Ng, Katharine Maher
Gravity, aeromagnetic and rock-property data of the central California Coast Ranges
Gravity, aeromagnetic, and rock-property data were collected to support geologic-mapping, water-resource, and seismic-hazard studies for the central California Coast Ranges. These data are combined with existing data to provide gravity, aeromagnetic, and physical-property datasets for this region. The gravity dataset consists of approximately 18,000 measurements. The aeromagnetic dataset consists
Authors
V. E. Langenheim
Active tensor magnetic gradiometer system final report for Project MM–1514
An interactive computer simulation program, based on physical models of system sensors, platform geometry, Earth environment, and spheroidal magnetically-permeable targets, was developed to generate synthetic magnetic field data from a conceptual tensor magnetic gradiometer system equipped with an active primary field generator. The system sensors emulate the prototype tensor magnetic gradiometer
Authors
David V. Smith, Jeffrey D. Phillips, S. Raymond Hutton
Rock-Eval pyrolysis and vitrinite reflectance results from the Sheep Creek 1 well, Susitna basin, south-central Alaska
We used Rock-Eval pyrolysis and vitrinite reflectance to examine the petroleum source potential of rock samples from the Sheep Creek 1 well in the Susitna basin of south-central Alaska. The results show that Miocene nonmarine coal, carbonaceous shale, and mudstone are potential sources of hydrocarbons and are thermally immature with respect to the oil window. In the samples that we studied, coals
Authors
Richard G. Stanley, Paul G. Lillis, Mark J. Pawlewicz, Peter J. Haeussler
By
Energy and Minerals Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Groundwater and Streamflow Information Program, Alaska Science Center, Central Energy Resources Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Forecasting conditional climate-change using a hybrid approach
A novel approach is proposed to forecast the likelihood of climate-change across spatial landscape gradients. This hybrid approach involves reconstructing past precipitation and temperature using the self-organizing map technique; determining quantile trends in the climate-change variables by quantile regression modeling; and computing conditional forecasts of climate-change variables based on sel
Authors
Akbar Akbari Esfahani, Michael J. Friedel
Alternative waste residue materials for passive in situ prevention of sulfide-mine tailings oxidation: A field evaluation
Novel solutions for sulfide-mine tailings remediation were evaluated in field-scale experiments on a former tailings repository in northern Sweden. Uncovered sulfide-tailings were compared to sewage-sludge biosolid amended tailings over 2 years. An application of a 0.2 m single-layer sewage-sludge amendment was unsuccessful at preventing oxygen ingress to underlying tailings. It merely slowed the
Authors
Peter Nason, Raymond H. Johnson, Clara Neuschutz, Lena Alakangas, Bjorn Ohlander
Arsenic speciation in solids using X-ray absorption spectroscopy
Synchrotron-based X-ray absorption spectroscopy (XAS) is an in situ, minimally-destructive, element-specific, molecular-scale structural probe that has been employed to study the chemical forms (species) of arsenic (As) in solid and aqueous phases (including rocks, soils, sediment, synthetic compounds, and numerous types of biota including humans) for more than 20 years. Although several excellent
Authors
Andrea L. Foster, Chris S. Kim
Fractionation of fulvic acid by iron and aluminum oxides: influence on copper toxicity to Ceriodaphnia dubia
This study examines the effect on aquatic copper toxicity of the chemical fractionation of fulvic acid (FA) that results from its association with iron and aluminum oxyhydroxide precipitates. Fractionated and unfractionated FAs obtained from streamwater and suspended sediment were utilized in acute Cu toxicity tests on ,i>Ceriodaphnia dubia. Toxicity test results with equal FA concentrations (6 mg
Authors
Kathleen S. Smith, James F. Ranville, Emily K. Lesher, Daniel J. Diedrich, Diane M. McKnight, Ruth M. Sofield
Noble gas geochemistry investigation of high CO2 natural gas at the LaBarge Platform, Wyoming, USA
A regional sampling of gases from thermal springs near the LaBarge Field, Wyoming, USA to determine the extent of the total carbon dioxide system (TCDS) indicates that the system may extend up to 70 km to the northwest of the field. Geochemical evidence from noble gas isotopes, stable element isotopes, and gas composition provide the foundation for these conclusions. Samples from Soda Springs to t
Authors
Matthew D. Merrill, Andrew G. Hunt, Celeste D. Lohr
Data management, assessment, and analysis for decision-making
No abstract available.
Authors
Carol C. Russell, Kathleen S. Smith, Virginia T. McLemore
Decision making, risk, and uncertainty
No abstract available.
Authors
Carol C. Russell, Kathleen S. Smith, Virginia T. McLemore
Climate Change 2014: Technical Summary
Human interference with the climate system is occurring (WGI AR5 SPM Section D.3; WGI AR5 Sections 2.2, 6.3, 10.3 to 10.6, 10.9). Climate change poses risks for human and natural systems. The assessment of impacts, adaptation, and vulnerability in the Working Group II contribution to the IPCC’s Fifth Assessment Report (WGII AR5) evaluates how patterns of risks and potential benefits are shifting d
Authors
Chrisopher B. Field, Vicente Barros, Katherine Mach, Michael Mastrandrea, Maarten van Aalst, Niel Adger, Douglas J Arent, Jonathan Barnett, Richard Betts, Eren Bilir, Joern Birkmann, Joann Carmin, Dave Chadee, Andrew Challinor, Monalisa Chaterjee, Wolfgang Cramer, Debra Davidson, Yuka Estrada, Jean-Pierre Gatusso, Yasuakai Hijioka, Gary Yohe, Margaret Hiza, Ove Hoegh-Guldberg, He-Qing Huang, Gregory Insarov, Roger Jones, Sari Kovats, Patricia Romero Lankao, Joan Nymand Larsen, Iñigo Losada, José Marengo, Roger McLean, Linda Mearns, Reinhard Mechler, John Morton, Isabelle Niang, Taikan Oki, Jane Mukarugwiza Olwoch, Maggie Opondo, Elvira Poloczanska, Hans -O. Pörtner, Andy Reisinger, Aromar Revi, Daniela Schmidt, Rebecca Shaw, William Solecki, Dáithí Stone, John Stone, Ken Strzepek, Avelino G. Suarez, Petra Tschakert, Riccardo Valentini, Sebastian Vicuna, Alicia Villamizar, Katharine Vincent, Rachel Warren, Leslie White, Thomas Wilbanks, Poh Poh Wong