Determination of earthquake magnitude for early warning from the time-dependence of P-wave amplitudes
Shunta Noda, William L. Ellsworth
2017, Bulletin of the Seismological Society of America (107) 1860-1867
We propose a method that utilizes the time dependence of P‐wave displacement amplitudes to estimate the final magnitude (M) for earthquake early warning (EEW) before the arrival of the peak amplitude. A relation between M and P‐wave displacement amplitude is employed for the method. Its value is set as a...
A spatiotemporal clustering model for the Third Uniform California Earthquake Rupture Forecast (UCERF3‐ETAS): Toward an operational earthquake forecast
Edward H. Field, Kevin R. Milner, Jeanne L. Hardebeck, Morgan T. Page, Nicholas van der Elst, Thomas H. Jordan, Andrew J. Michael, Bruce E. Shaw, Maximillan J. Werner
2017, Bulletin of the Seismological Society of America (107) 1049-1081
We, the ongoing Working Group on California Earthquake Probabilities, present a spatiotemporal clustering model for the Third Uniform California Earthquake Rupture Forecast (UCERF3), with the goal being to represent aftershocks, induced seismicity, and otherwise triggered events as a potential basis for operational earthquake forecasting (OEF). Specifically, we add an epidemic‐type...
Adding a nitrogen footprint to Colorado State University’s sustainability plan
Jacob Kimiecik, Jill Baron, Timothy Weinmann, Emily Taylor
2017, Sustainability (10) 89-95
As a large land grant university with more than 32,000 students, Colorado State University has both on-campus non-agricultural and agricultural sources of nitrogen (N) released to the environment. We used the Nitrogen Footprint Tool to estimate the amount of N released from different sectors of the university for the CSU...
Life history constraints explain negative relationship between fish productivity and dissolved organic carbon in lakes
Nicola Craig, Stuart E. Jones, Brian Weidel, Christopher T. Solomon
2017, Ecology and Evolution (7) 6201-6209
Resource availability constrains the life history strategies available to organisms and may thereby limit population growth rates and productivity. We used this conceptual framework to explore the mechanisms driving recently reported negative relationships between fish productivity and dissolved organic carbon (DOC) concentrations in lakes. We studied populations of bluegill (Lepomis...
Remote measurement of high preeruptive water vapor emissions at Sabancaya volcano by passive differential optical absorption spectroscopy
Christoph Kern, Pablo Masias, Fredy Apaza, Kevin Reath, Ulrich Platt
2017, Journal of Geophysical Research B: Solid Earth (122) 3540-3564
Water (H2O) is by far the most abundant volcanic volatile species and plays a predominant role in driving volcanic eruptions. However, numerous difficulties associated with making accurate measurements of water vapor in volcanic plumes have limited their use as a diagnostic tool. Here we present the first detection of water...
The difficulty of measuring the absorption of scattered sunlight by H2O and CO2 in volcanic plumes: A comment on Pering et al. “A novel and inexpensive method for measuring volcanic plume water fluxes at high temporal resolution,” Remote Sens. 2017, 9, 146
Christoph Kern
2017, Remote Sensing (9)
In their recent study, Pering et al. (2017) presented a novel method for measuring volcanic water vapor fluxes. Their method is based on imaging volcanic gas and aerosol plumes using a camera sensitive to the near-infrared (NIR) absorption of water vapor. The imaging data are empirically calibrated by comparison with...
Diel periodicity and chronology of upstream migration in yellow-phase American eels (Anguilla rostrata)
Joni L. Aldinger, Stuart A. Welsh
2017, Environmental Biology of Fishes (100) 829-838
Yellow-phase American eel (Anguilla rostrata) upstream migration is temporally punctuated, yet migration chronology within diel time periods is not well-understood. This study examined diel periodicity, chronology, and total length (TL) of six multi-day, high-count (285–1,868 eels) passage events of upstream migrant yellow-phase American eels at the Millville Dam...
USGS Integration of New Science and Technology, Appendix A
Marybeth K. Brey, Brent C. Knights, Aaron R. Cupp, Jon Amberg, Duane Chapman, Robin D. Calfee, James J. Duncker
2017, Report, 2017 Asian Carp Monitoring and Response Plan
This product summarizes the USGS plans for integration of new science and technology into Asian Carp control efforts for 2017. This includes the 1) implementation and evaluation of new tactics and behavioral information for monitoring, surveillance, control and containment; 2) understanding behavior and reproduction of Asian carp in established and...
How uncertainty analysis of streamflow data can reduce costs and promote robust decisions in water management applications
Hilary McMilan, Jan Seibert, Asgeir Petersen-Overleir, Michel Lang, Paul White, Ton Snelder, Kit Rutherford, Tobias Krueger, Robert R. Mason, Jr., Julie E. Kiang
2017, Water Resources Research (53) 5220-5228
Streamflow data are used for important environmental and economic decisions, such as specifying and regulating minimum flows, managing water supplies, and planning for flood hazards. Despite significant uncertainty in most flow data, the flow series for these applications are often communicated and used without uncertainty information. In this commentary, we...
Chemical and isotopic evidence for CO2 charge and migration within Bravo Dome and potential CO2 leakage to the southwest
Sean T. Brennan
2017, Energy Procedia (114) 2996-3005
Gas analyses from northeastern New Mexico, USA indicate that previous interpretations of the location of gas charge into the northeastern portion of Bravo Dome are likely correct, and that there may be multiple migration pathways from the same source for different regions in northeastern New Mexico....
Geomorphic processes responsible for decadal-scale arroyo changes, Rio Puerco, New Mexico
Allen C. Gellis, John G. Elliott, Milan Pavich
2017, Geological Society of America Bulletin (129) 1660-1680
The channel and arroyo of the Rio Puerco have continued to evolve since incision in the late 1800s. Resurveys of channel cross sections and aerial imagery over time indicate that between the 1970s and 1990s, the upstream reaches (type 1 morphology) of the Rio Puerco have continued to undergo construction...
Understanding and finding solutions to the problem of sedimentation in the National Wildlife Refuge System
Max Post van der Burg, Karen Jenni, Timothy L. Nieman, Josh D. Eash, Gregory A. Knutsen
2017, Journal of Fish and Wildlife Management (8) 648-660
The National Wildlife Refuge System (Refuge System) is a collection of public lands maintained by the U.S. Fish and Wildlife Service for migratory birds and other wildlife. Wetlands on individual National Wildlife Refuges (Refuges) may be at risk of increased sedimentation because of land use...
Nitrogenase activity by biological soil crusts in cold sagebrush steppe ecosystems
Stacy G. Schwabedissen, Kathleen A. Lohse, Sasha C. Reed, Ken A. Aho, Timothy S. Magnuson
2017, Biogeochemistry (134) 57-76
In drylands worldwide, biological soil crusts (BSC) form a thin photosynthetic cover across landscapes, and provide vital benefits in terms of stabilizing soil and fixing nitrogen (N) and carbon (C). Numerous studies have examined the effects of climate and disturbance on BSC functions; however, few have characterized these responses in...
Life history migrations of adult Yellowstone Cutthroat Trout in the upper Yellowstone River
Brian D. Ertel, Thomas E. McMahon, Todd M. Koel, Robert E. Gresswell, Jason Burckhardt
2017, North American Journal of Fisheries Management (37) 743-755
Knowledge of salmonid life history types at the watershed scale is increasingly recognized as a cornerstone for effective management. In this study, we used radiotelemetry to characterize the life history movements of Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri in the upper Yellowstone River, an extensive tributary that composes nearly half of the...
Borates, 2016
Robert Crangle Jr.
2017, Mining Engineering (69) 29-29
No abstract available....
Use of spatial capture–recapture to estimate density of Andean bears in northern Ecuador
Santiago Molina, Angela K. Fuller, Dana J. Morin, J. Andrew Royle
2017, Ursus (28) 117-126
The Andean bear (Tremarctos ornatus) is the only extant species of bear in South America and is considered threatened across its range and endangered in Ecuador. Habitat loss and fragmentation is considered a critical threat to the species, and there is a lack of knowledge regarding its distribution and abundance....
Short-term ecological consequences of collaborative restoration treatments in ponderosa pine forests of Colorado
Jenny S. Briggs, Paula J. Fornwalt, Jonas A. Feinstein
2017, Forest Ecology and Management (395) 69-80
Ecological restoration treatments are being implemented at an increasing rate in ponderosa pine and other dry conifer forests across the western United States, via the USDA Forest Service’s Collaborative Forest Landscape Restoration (CFLR) program. In this program, collaborative stakeholder groups work with National Forests (NFs) to adaptively implement and monitor...
Heat as a groundwater tracer in shallow and deep heterogeneous media: Analytical solution, spreadsheet tool, and field applications
Barret L. Kurylyk, Dylan J. Irvine, Sean K. Carey, Martin A. Briggs, Dale D. Werkema, Mariah Bonham
2017, Hydrological Processes (31) 2648-2661
Groundwater flow advects heat, and thus, the deviation of subsurface temperatures from an expected conduction‐dominated regime can be analysed to estimate vertical water fluxes. A number of analytical approaches have been proposed for using heat as a groundwater tracer, and these have typically assumed a homogeneous medium. However, heterogeneous thermal...
A proposal for amending administrative law to facilitate adaptive management
Robin K. Craig, J.B. Ruhl, Ellie Brown, Byron K. Williams
2017, Environmental Research Letters (12) 1-17
In this article we examine how federal agencies use adaptive management. In order for federal agencies to implement adaptive management more successfully, administrative law must adapt to adaptive management, and we propose changes in administrative law that will help to steer the current process out of a dead end. Adaptive...
10Be dating of late Pleistocene megafloods and Cordilleran Ice Sheet retreat in the northwestern United States
Andrea M. Balbas, Aaron M. Barth, Peter U. Clark, Jorie Clark, Marc A. Caffee, Jim E. O'Connor, Victor R. Baker, Kevin Konrad, Bruce Bjornstad
2017, Geology (45) 583-586
During the late Pleistocene, multiple floods from drainage of glacial Lake Missoula further eroded a vast anastomosing network of bedrock channels, coulees, and cataracts, forming the Channeled Scabland of eastern Washington State (United States). However, the timing and exact pathways of these Missoula floods remain poorly constrained, thereby limiting our...
Glacierized headwater streams as aquifer recharge corridors, subarctic Alaska
Anna K. Lilledahl, Anne Gadeke, Shad O’Neel, T. A. Gatesman, T. A. Douglas
2017, Geophysical Research Letters (44) 6876-6885
Arctic river discharge has increased in recent decades although sources and mechanisms remain debated. Abundant literature documents permafrost thaw and mountain glacier shrinkage over the past decades. Here we link glacier runoff to aquifer recharge via a losing headwater stream in subarctic Interior Alaska. Field measurements in Jarvis Creek (634 km2),...
Geomagnetically induced currents: Science, engineering, and applications readiness
Antti Pulkkinen, E. Bernabeu, A. Thomson, A. Viljanen, R. Pirjola, D. Boteler, J. Eichner, P.J. Cilliers, D. Welling, N.P. Savani, R.S. Weigel, Jeffrey J. Love, Christopher Balch, C.M. Ngwira, G. Crowley, Adam Schultz, R. Kataoka, B. Anderson, D. Fugate, J.J. Simpson, M. MacAlester
2017, Space Weather (15) 828-856
This paper is the primary deliverable of the very first NASA Living With a Star Institute Working Group, Geomagnetically Induced Currents (GIC) Working Group. The paper provides a broad overview of the current status and future challenges pertaining to the science, engineering, and applications of the GIC problem. Science is...
A cosmopolitan late Ediacaran biotic assemblage: new fossils from Nevada and Namibia support a global biostratigraphic link
E. F. Smith, L. L. Nelson, S. M. Tweedt, H. Zeng, Jeremiah B. Workman
2017, Proceedings of the Royal Society B (284) 1-10
Owing to the lack of temporally well-constrained Ediacaran fossil localities containing overlapping biotic assemblages, it has remained uncertain if the latest Ediacaran (ca 550–541 Ma) assemblages reflect systematic biological turnover or environmental, taphonomic or biogeographic biases. Here, we report new latest Ediacaran fossil discoveries from the lower member of the Wood...
Seven recommendations to make your invasive alien species data more useful
Quentin J. Groom, Tim Adriaens, Peter Desmet, Annie Simpson, Aaike De Wever, Ioannis Bazos, Ana Cristina Cardoso, Lucinda Charles, Anastasia Christopoulou, Anna Gazda, Harry Helmisaari, Donald Hobern, Melanie Josefsson, Frances Lucy, Dragana Marisavljevic, Tomasz Oszako, Jan Pergl, Olivera Petrovic-Obradovic, Celine Prevot, Hans Peter Ravn, Gareth Richards, Alain Roques, Helen Roy, Marie-Anne A. Rozenberg, Riccardo Scalera, Elena Tricarico, Teodora Trichkova, Diemer Vercayie, Argyro Zenetos, Sonia Vanderhoeven
2017, Frontiers in Applied Mathematics and Statistics (3) 1-8
Science-based strategies to tackle biological invasions depend on recent, accurate, well-documented, standardized and openly accessible information on alien species. Currently and historically, biodiversity data are scattered in numerous disconnected data silos that lack interoperability. The situation is no different for alien species data, and this obstructs efficient retrieval, combination, and...
Evaluating population expansion of black bears using spatial capture-recapture
Catherine C. Sun, Angela K. Fuller, Matthew P. Hare, Jeremy E. Hurst
2017, Journal of Wildlife Management (81) 814-823
The population of American black bears (Ursus americanus) in southern New York, USA has been growing and expanding in range since the 1990s. This has motivated a need to anticipate future patterns of range expansion. We conducted a non-invasive, genetic, spatial capture-recapture (SCR) study to estimate black bear density and...
