Publications
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1000 dams down and counting 1000 dams down and counting
Forty years ago, the demolition of large dams was mostly fiction, notably plotted in Edward Abbey's novel The Monkey Wrench Gang. Its 1975 publication roughly coincided with the end of large-dam construction in the United States. Since then, dams have been taken down in increasing numbers as they have filled with sediment, become unsafe or inefficient, or otherwise outlived their...
Authors
James E. O'Connor, Jeff J. Duda, Gordon E. Grant
By
Ecosystems Mission Area, Geology, Energy, and Minerals Mission Area, Natural Hazards Mission Area, Energy Resources Program, Groundwater and Streamflow Information Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Volcano Hazards Program, Geology, Minerals, Energy, and Geophysics Science Center, John Wesley Powell Center for Analysis and Synthesis, Volcano Science Center, Western Fisheries Research Center
Intertidal biological indicators of coseismic subsidence during the Mw 7.8 Haida Gwaii, Canada, earthquake Intertidal biological indicators of coseismic subsidence during the Mw 7.8 Haida Gwaii, Canada, earthquake
The 28 October 2012 Mw 7.8 Haida Gwaii earthquake was a megathrust earthquake along the very obliquely convergent Queen Charlotte margin of British Columbia, Canada. Coseismic deformation is not well constrained by geodesy, with only six Global Positioning System (GPS) sites and two tide gauge stations within 250 km of the rupture area. To better constrain vertical coseismic deformation...
Authors
Peter Haeussler, Robert C. Witter, Kelin Wang
Precise interpolar phasing of abrupt climate change during the last ice age Precise interpolar phasing of abrupt climate change during the last ice age
The last glacial period exhibited abrupt Dansgaard–Oeschger climatic oscillations, evidence of which is preserved in a variety of Northern Hemisphere palaeoclimate archives1. Ice cores show that Antarctica cooled during the warm phases of the Greenland Dansgaard–Oeschger cycle and vice versa2, 3, suggesting an interhemispheric redistribution of heat through a mechanism called the bipolar...
Authors
Christo Buizert, Betty Adrian, Jinho Ahn, Mary Albert, Richard Alley, Daniel Baggenstos, Thomas Bauska, Ryan Bay, Brian Bencivengo, Charles Bentley, Edward Brook, Nathan Chellman, Gary Clow, Jihong Cole-Dai, Howard Conway, Eric Cravens, Kurt Cuffey, Nelia Dunbar, Jon Edwards, John M. Fegyveresi, Dave Ferris, Joan Fitzpatrick, T. Fudge, Chris Gibson, Vasileios Gkinis, Joshua Goetz, Stephanie Gregory, Geoffrey Hargreaves, Nels Iverson, Jay A. Johnson, Tyler Jones, Michael Kalk, Matthew Kippenhan, Bess Koffman, Karl Kreutz, Tanner Kuhl, Donald Lebar, James E. Lee, Shaun Marcott, Bradley R. Markle, Olivia Maselli, Joseph R. McConnell, Kenneth McGwire, Logan Mitchell, Nicolai Mortensen, Peter Neff, Kunihiko Nishiizumi, Richard M. Nunn, Anais Orsi, Daniel Pasteris, Joel Pedro, Erin Pettit, P. Price, John Priscu, Rachael Rhodes, Julia Rosen, Andrew Schauer, Spruce Schoenemann, Paul Sendelbach, Jeffrey Severinghaus, Alexander Shturmakov, Michael Sigl, Kristina Slawny, Joseph M. Souney, Todd Sowers, Matthew Spencer, Eric Steig, Kendrick Taylor, Mark Twickler, Bruce Vaughn, Donald Voigt, Edwin Waddington, Kees Welten, Anthony Wendricks, James White, Mai Winstrup, Gifford Wong, Thomas Woodruff
Focused exhumation along megathrust splay faults in Prince William Sound, Alaska Focused exhumation along megathrust splay faults in Prince William Sound, Alaska
Megathrust splay faults are a common feature of accretionary prisms and can be important for generating tsunamis during some subduction zone earthquakes. Here we provide new evidence from Alaska that megathrust splay faults have been conduits for focused exhumation in the last 5 Ma. In most of central Prince William Sound, published and new low-temperature thermochronology data indicate...
Authors
Peter Haeussler, Phillip A Armstrong, Lee Liberty, Kelly Ferguson, Shaun P Finn, Jeannette Arkle, Thomas Pratt
Complex terrain alters temperature and moisture limitations of forest soil respiration across a semiarid to subalpine gradient Complex terrain alters temperature and moisture limitations of forest soil respiration across a semiarid to subalpine gradient
Forest soil respiration is a major carbon (C) flux that is characterized by significant variability in space and time. We quantified growing season soil respiration during both a drought year and a nondrought year across a complex landscape to identify how landscape and climate interact to control soil respiration. We asked the following questions: (1) How does soil respiration vary...
Authors
Erin Berryman, H.R. Barnard, H.R. Adams, M.A. Burns, E. Gallo, P. Brooks
Estimating concentrations of fine-grained and total suspended sediment from close-range remote sensing imagery Estimating concentrations of fine-grained and total suspended sediment from close-range remote sensing imagery
Fluvial sediment, a vital surface water resource, is hazardous in excess. Suspended sediment, the most prevalent source of impairment of river systems, can adversely affect flood control, navigation, fisheries and aquatic ecosystems, recreation, and water supply (e.g., Rasmussen et al., 2009; Qu, 2014). Monitoring programs typically focus on suspended-sediment concentration (SSC) and...
Authors
Adam Mosbrucker, Kurt Spicer, Tami Christianson, Mark Uhrich
Surrogate analysis and index developer (SAID) tool and real-time data dissemination utilities Surrogate analysis and index developer (SAID) tool and real-time data dissemination utilities
The use of acoustic and other parameters as surrogates for suspended-sediment concentrations (SSC) in rivers has been successful in multiple applications across the Nation. Critical to advancing the operational use of surrogates are tools to process and evaluate the data along with the subsequent development of regression models from which real-time sediment concentrations can be made...
Authors
Marian Domanski, Timothy D. Straub, Molly Wood, Mark Landers, Gary Wall, Steven Brady
Digital representation of oil and natural gas well pad scars in southwest Wyoming: 2012 update Digital representation of oil and natural gas well pad scars in southwest Wyoming: 2012 update
The recent proliferation of oil and natural gas energy development in the Greater Green River Basin of southwest Wyoming has accentuated the need to understand wildlife responses to this development. The location and extent of surface disturbance that is created by oil and natural gas well pad scars are key pieces of information used to assess the effects of energy infrastructure on...
Authors
Steven Garman, Jamie McBeth
Physical subdivision and description of the water-bearing sediments of the Santa Clara Valley, California Physical subdivision and description of the water-bearing sediments of the Santa Clara Valley, California
A thick Quaternary alluvial section fills a sedimentary basin beneath the Santa Clara Valley, California, located within the San Andreas Fault system at the south end of San Francisco Bay. This section consists of an upper sequence about 1,000 feet thick containing eight sedimentary cycles and a lower fine-grained unit as thick as several hundred feet. Together these constitute the...
Authors
Carl Wentworth, Robert Jachens, Robert A. Williams, John C. Tinsley, Randall Hanson
Radar attenuation and temperature within the Greenland Ice Sheet Radar attenuation and temperature within the Greenland Ice Sheet
The flow of ice is temperature-dependent, but direct measurements of englacial temperature are sparse. The dielectric attenuation of radio waves through ice is also temperature-dependent, and radar sounding of ice sheets is sensitive to this attenuation. Here we estimate depth-averaged radar-attenuation rates within the Greenland Ice Sheet from airborne radar-sounding data and its...
Authors
Joseph MacGregor, Jilu Li, John Paden, Ginny Catania, Gary Clow, Mark Fahnestock, Prasad Gogineni, Robert Grimm, Mathieu Morlighem, Soumyaroop Nandi, Helene Seroussi, David Stillman
Reconnaissance investigation of the Lisburne Group in the Cobblestone Creek area, Chandler Lake quadrangle, Alaska Reconnaissance investigation of the Lisburne Group in the Cobblestone Creek area, Chandler Lake quadrangle, Alaska
A reconnaissance investigation of the Carboniferous Lisburne Group in the Cobblestone Creek area, Chandler Lake Quadrangle, yields insights into its resource potential and regional relations. Locally porous vuggy dolostone with hydrocarbon reservoir potential occurs in the lower Lisburne in the three most southerly of five thrust sheets, and contains traces of dead oil in two of these...
Authors
Julie Dumoulin, Michael Whalen
Insufficient sampling to identify species affected by turbine collisions Insufficient sampling to identify species affected by turbine collisions
We compared the number of avian species detected and the sampling effort during fatality monitoring at 50 North American wind facilities. Facilities with short intervals between sampling events and high effort detected more species, but many facilities appeared undersampled. Species accumulation curves for 2 wind facilities studied for more than 1 year had yet to reach an asymptote. The...
Authors
Julie Beston, James E. Diffendorfer, Scott Loss