Conodont biostratigraphy of the Permian-Triassic boundary sequence at Lung Cam, Vietnam
Bruce R. Wardlaw, Merlynd K. Nestell, Galina P. Nestell, Brooks B. Ellwood, Luu Thi Phuong Lan
2015, Micropaleontology (61) 313-334
The occurrences of a few specimens of Clarkina and many specimens of Hindeodus at the Permian-Triassic boundary section at Lung Cam, Vietnam allow accurate graphic correlation to the P-T boundary stratotype at Meishan, China. One species of Clarkina, ten species and two subspecies of Hindeodus, and the apparatuses of Hindeodus...
Conodont faunas from a complete basinal succession of the upper part of the Wordian (Middle Permian, Guadalupian, West Texas)
Bruce R. Wardlaw, Merlynd K. Nestell
2015, Micropaleontology (61) 257-292
In the southern part of the Patterson Hills just to the west of the Guadalupe Mountains escarpment ofWest Texas, a 29m outcrop of alternating calcareous siltstone and silty limestone with a few thin fine sandstone interbeds displays the overlap occurrence of a narrowmorphotype of Jinogondolella nankingensis (herein named J. nankingensis...
Evaluation of the Global Land Data Assimilation System (GLDAS) air temperature data products
Lei Ji, Gabriel B. Senay, James P. Verdin
2015, Journal of Hydrometeorology (16) 2463-2480
There is a high demand for agrohydrologic models to use gridded near-surface air temperature data as the model input for estimating regional and global water budgets and cycles. The Global Land Data Assimilation System (GLDAS) developed by combining simulation models with observations provides a long-term gridded meteorological dataset at the...
Annual survival rate estimate of satellite transmitter–marked eastern population greater sandhill cranes
David L. Fronczak, David E. Andersen, Everett E. Hanna, Thomas R. Cooper
2015, Journal of Fish and Wildlife Management (6) 464-471
Several surveys have documented the increasing population size and geographic distribution of Eastern Population greater sandhill cranes Grus canadensis tabida since the 1960s. Sport hunting of this population of sandhill cranes started in 2012 following the provisions of the Eastern Population Sandhill Crane Management Plan. However, there are currently no...
Long-term anoxia and release of ancient, labile carbon upon thaw of Pleistocene permafrost
Stephanie A. Ewing, Jonathan A. O’Donnell, George R. Aiken, Kenna D. Butler, David Butman, Lisamarie Windham-Myers, Mikhail Kanevskiy
2015, Geophysical Research Letters (42) 10730-10738
The fate of permafrost carbon upon thaw will drive feedbacks to climate warming. Here we consider the character and context of dissolved organic carbon (DOC) in yedoma permafrost cores from up to 20 m depth in central Alaska. We observed high DOC concentrations (4 to 129 mM) and consistent low molecular weight...
The 2014 update to the National Seismic Hazard Model in California
Peter M. Powers, Edward H. Field
2015, Earthquake Spectra (31) S177-S200
The 2014 update to the U. S. Geological Survey National Seismic Hazard Model in California introduces a new earthquake rate model and new ground motion models (GMMs) that give rise to numerous changes to seismic hazard throughout the state. The updated earthquake rate model is the third version of the...
Seismic source characterization for the 2014 update of the U.S. National Seismic Hazard Model
Morgan P. Moschetti, Peter M. Powers, Mark D. Petersen, Oliver S. Boyd, Rui Chen, Edward H. Field, Arthur D. Frankel, Kathleen Haller, Stephen Harmsen, Charles S. Mueller, Russell Wheeler, Yuehua Zeng
2015, Earthquake Spectra (31) S31-S57
We present the updated seismic source characterization (SSC) for the 2014 update of the National Seismic Hazard Model (NSHM) for the conterminous United States. Construction of the seismic source models employs the methodology that was developed for the 1996 NSHM but includes new and updated data, data types, source models,...
Determining climate change management priorities: A case study from Wisconsin
Olivia E. LeDee, Christine Ribic
2015, Journal of Conservation Planning (11) 1-12
A burgeoning dialogue exists regarding how to allocate resources to maximize the likelihood of long-term biodiversity conservation within the context of climate change. To make effective decisions in natural resource management, an iterative, collaborative, and learning-based decision process may be more successful than a strictly consultative approach. One important, early...
Sources and transport of phosphorus to rivers in California and adjacent states, U.S., as determined by SPARROW modeling
Joseph L. Domagalski, Dina Saleh
2015, Journal of the American Water Resources Association (51) 1463-1486
The SPARROW (SPAtially Referenced Regression on Watershed attributes) model was used to simulate annual phosphorus loads and concentrations in unmonitored stream reaches in California, U.S., and portions of Nevada and Oregon. The model was calibrated using de-trended streamflow and phosphorus concentration data at 80 locations. The model explained 91% of...
The 2014 United States National Seismic Hazard Model
Mark D. Petersen, Morgan P. Moschetti, Peter M. Powers, Charles Mueller, Kathleen Haller, Arthur D. Frankel, Yuehua Zeng, Sanaz Rezaeian, Stephen Harmsen, Oliver S. Boyd, Edward H. Field, Rui Chen, Kenneth S. Rukstales, Nico Luco, Russell Wheeler, Robert Williams, Anna H. Olsen
2015, Earthquake Spectra (31) S1-S30
New seismic hazard maps have been developed for the conterminous United States using the latest data, models, and methods available for assessing earthquake hazard. The hazard models incorporate new information on earthquake rupture behavior observed in recent earthquakes; fault studies that use both geologic and geodetic strain rate data; earthquake...
Updates to building-code maps for the 2015 NEHRP recommended seismic provisions
Nico Luco, Robert Bachman, C.B Crouse, James R. Harris, John D. Hooper, Charles A. Kircher, Phillp Caldwell, Kenneth S. Rukstales
2015, Earthquake Spectra (31) S245-S271
With the 2014 update of the U.S. Geological Survey (USGS) National Seismic Hazard Model (NSHM) as a basis, the Building Seismic Safety Council (BSSC) has updated the earthquake ground motion maps in the National Earthquake Hazards Reduction Program (NEHRP) Recommended Seismic Provisions for New Buildings and Other Structures, with partial...
Influence of grazing and land use on stream-channel characteristics among small dairy farms in the Eastern United States
Genevieve Brand, Bruce C. Vondracek, Nicholas R. Jordan
2015, Renewable Agriculture and Food Systems (30) 524-536
Rotational grazing (RG) is a livestock management practice that rotates grazing cattle on a scale of hours to days among small pastures termed paddocks. It may beneficially affect stream channels, relative to other livestock management practices. Such effects and other beneficial effects on hydrology are important to RG's potential to...
Low resistivity and permeability in actively deforming shear zones on the San Andreas Fault at SAFOD
Carolyn A. Morrow, David A. Lockner, Stephen H. Hickman
2015, Journal of Geophysical Research (120) 8240-8258
The San Andreas Fault Observatory at Depth (SAFOD) scientific drillhole near Parkfield, California crosses the San Andreas Fault at a depth of 2.7 km. Downhole measurements and analysis of core retrieved from Phase 3 drilling reveal two narrow, actively deforming zones of smectite-clay gouge within a roughly 200 m-wide...
Hydrologic implications of GRACE satellite data in the Colorado River Basin
Bridget R. Scanlon, Zizhan Zhang, Robert C. Reedy, Donald R. Pool, Himanshu Save, Di Long, Jianli Chen, David M. Wolock, Brian D. Conway, Daniel Winester
2015, Water Resources Research (51) 9891-9903
Use of GRACE (Gravity Recovery and Climate Experiment) satellites for assessing global water resources is rapidly expanding. Here we advance application of GRACE satellites by reconstructing long-term total water storage (TWS) changes from ground-based monitoring and modeling data. We applied the approach to the Colorado River Basin which has experienced...
Ground motion models used in the 2014 U.S. National Seismic Hazard Maps
Sanaz Rezaeian, Mark D. Petersen, Morgan P. Moschetti
2015, Earthquake Spectra (31) S59-S84
The National Seismic Hazard Maps (NSHMs) are an important component of seismic design regulations in the United States. This paper compares hazard using the new suite of ground motion models (GMMs) relative to hazard using the suite of GMMs applied in the previous version of the maps. The new source...
Tidal marsh susceptibility to sea-level rise: importance of local-scale models
Karen M. Thorne, Kevin J. Buffington, Deborah L. Elliott-Fisk, John Y. Takekawa
2015, Journal of Fish and Wildlife Management (3) 290-304
Increasing concern over sea-level rise impacts to coastal tidal marsh ecosystems has led to modeling efforts to anticipate outcomes for resource management decision making. Few studies on the Pacific coast of North America have modeled sea-level rise marsh susceptibility at a scale relevant to local wildlife populations and plant communities....
2014 Update of the Pacific Northwest portion of the U.S. National Seismic Hazard Maps
Arthur D. Frankel, Rui Chen, Mark D. Petersen, Morgan P. Moschetti, Brian L. Sherrod
2015, Earthquake Spectra (31) S131-S148
Several aspects of the earthquake characterization were changed for the Pacific Northwest portion of the 2014 update of the national seismic hazard maps, reflecting recent scientific findings. New logic trees were developed for the recurrence parameters of M8-9 earthquakes on the Cascadia subduction zone (CSZ) and for the eastern edge...
SPARROW modeling of nitrogen sources and transport in rivers and streams of California and adjacent states, U.S.
Dina Saleh, Joseph L. Domagalski
2015, Journal of the American Water Resources Association (51) 1487-1507
The SPARROW (SPAtially Referenced Regressions On Watershed attributes) model was used to evaluate the spatial distribution of total nitrogen (TN) sources, loads, watershed yields, and factors affecting transport and decay in the stream network of California and portions of adjacent states for the year 2002. The two major TN sources...
Quantifying the residence time and flushing characteristics of a shallow, back-barrier estuary: Application of hydrodynamic and particle tracking models
Zafer Defne, Neil K. Ganju
2015, Estuaries and Coasts (38) 1719-1734
Estuarine residence time is a major driver of eutrophication and water quality. Barnegat Bay-Little Egg Harbor (BB-LEH), New Jersey, is a lagoonal back-barrier estuary that is subject to anthropogenic pressures including nutrient loading, eutrophication, and subsequent declines in water quality. A combination of hydrodynamic and particle tracking modeling was used...
Seismic hazard in the Intermountain West
Kathleen Haller, Morgan P. Moschetti, Charles Mueller, Sanaz Rezaeian, Mark D. Petersen, Yuehua Zeng
2015, Earthquake Spectra (31) S149-S176
The 2014 national seismic-hazard model for the conterminous United States incorporates new scientific results and important model adjustments. The current model includes updates to the historical catalog, which is spatially smoothed using both fixed-length and adaptive-length smoothing kernels. Fault-source characterization improved by adding faults, revising rates of activity, and incorporating...
Book review: Natural resources in Afghanistan: Geographic and geologic perspectives on centuries of conflict
Jeff L. Doebrich
2015, Economic Geology (110) 1907-1908
This book is the outcome of four decades of work in Afghanistan by the author, John (Jack) Shroder. His travels and research throughout Afghanistan and his understanding of its place in regional and world history provide the foundation for this comprehensive 572-page reference. The book describes the interrelated nature of...
Evaluating potential conservation conflicts between two listed species: Sea otters and black abalone
Peter T. Raimondi, Laura J. Jurgens, M. Tim Tinker
2015, Ecology, Evolution, and Systematics (96) 3102-3108
Population consequences of endangered species interacting as predators and prey have been considered theoretically and legally, but rarely investigated in the field. We examined relationships between spatially variable populations of a predator, the California sea otter, Enhydra lutris nereis, and a prey species, the black abalone, Haliotis cracherodii. Both species are federally...
Powell Center Newsletter, Volume 2, Issue 1
Jill S. Baron, Marty Goldhaber
2015, Report
Bi-annual newsletter for the John Wesley Powell Center for Analysis and Synthesis, covering news through July of 2015...
Book review: Bats: A world of science and mystery.
Paul M. Cryan
2015, Biological Conservation (192) 323-323
This book has something for everyone, from casual seekers of fascinating eye candy to professional scientists interested in the latest discoveries. Without losing sight of how mysterious bats remain despite decades of research, the authors deftly introduce readers to bats and the people who study them. The book...
A comparison of thermal infrared to fiber-optic distributed temperature sensing for evaluation of groundwater discharge to surface water
Danielle K Hare, Martin A. Briggs, Donald O. Rosenberry, Dave Boutt, John W. Lane Jr.
2015, Journal of Hydrology (530) 153-166
Groundwater has a predictable thermal signature that can be used to locate discrete zones of discharge to surface water. As climate warms, surface water with strong groundwater influence will provide habitat stability and refuge for thermally stressed aquatic species, and is therefore critical to locate and protect. Alternatively, these discrete...
