Phenological response of an Arizona dryland forest to short-term climatic extremes
Jessica J. Walker, Kirsten de Beurs, Randolph Wynne
2015, Remote Sensing (7) 10832-10855
Baseline information about dryland forest phenology is necessary to accurately anticipate future ecosystem shifts. The overarching goal of our study was to investigate the variability of vegetation phenology across a dryland forest landscape in response to climate alterations. We analyzed the influence of site characteristics and climatic conditions on the...
Ordovician of Germany Valley, West Virginia
John T. Haynes, Keith E. Goggin, Randall C. Orndorff, Lisa R. Goggin
2015, Stratigraphy (12) 1-45
This trip will consist of stops at five locations (Fig. 1) that provide a detailed look at the strata in a major part of the Ordovician section in Germany Valley, Pendleton County, West Virginia. At these stops, we will highlight a varied sequence of carbonate and siliciclastic strata that accumulated during the...
Evaluation of statistical treatments of left-censored environmental data using coincident uncensored data sets. II. Group comparisons
Ronald C. Antweiler
2015, Environmental Science & Technology (49) 13439-13446
The main classes of statistical treatments that have been used to determine if two groups of censored environmental data arise from the same distribution are substitution methods, maximum likelihood (MLE) techniques, and nonparametric methods. These treatments along with using all instrument-generated data (IN), even those less than the detection limit,...
Geologic setting of the proposed Fallon FORGE Site, Nevada: Suitability for EGS research and development
James E. Faulds, Douglas Blankenship, Nicholas H. Hinz, Andrew Sabin, Josh Nordquist, Stephen H. Hickman, Jonathan M.G. Glen, Mack Kennedy, Drew Siler, Ann Robinson-Tait, Colin F. Williams, Peter Drakos, Wendy M. Calvin
2015, GRC Transactions (39) 293-302
The proposed Fallon FORGE site lies within and adjacent to the Naval Air Station Fallon (NASF) directly southeast of the town of Fallon, Nevada, within the large basin of the Carson Sink in west-central Nevada. The site is located on two parcels that include land owned by the NASF and...
Eocene and Miocene extension, meteoric fluid infiltration, and core complex formation in the Great Basin (Raft River Mountains, Utah)
Katharina Methner, Andreas Mulch, Christian Teyssier, Michael L. Wells, Michael A. Cosca, Raphael Gottardi, Aude Gebelin, C. Page Chamberlain
2015, Tectonics (34) 680-693
Metamorphic core complexes (MCCs) in the North American Cordillera reflect the effects of lithospheric extension and contribute to crustal adjustments both during and after a protracted subduction history along the Pacific plate margin. While the Miocene-to-recent history of most MCCs in the Great Basin, including the Raft River-Albion-Grouse Creek MCC,...
Hydrothermal, biogenic, and seawater components in metalliferous black shales of the Brooks Range, Alaska: Synsedimentary metal enrichment in a carbonate ramp setting
John F. Slack, David Selby, Julie A. Dumoulin
2015, Economic Geology (110) 653-675
Trace element and Os isotope data for Lisburne Group metalliferous black shales of Middle Mississippian (early Chesterian) age in the Brooks Range of northern Alaska suggest that metals were sourced chiefly from local seawater (including biogenic detritus) but also from externally derived hydrothermal fluids. These black shales are interbedded with...
Introduction to the special issue on the 2012 Haida Gwaii and 2013 Craig earthquakes at the Pacific–North America plate boundary (British Columbia and Alaska)
Thomas S. James, John F. Cassidy, Garry C. Rogers, Peter J. Haeussler
2015, Bulletin of the Seismological Society of America (105) 1053-1057
The 27 October 2012 Mw 7.8 Haida Gwaii thrust earthquake and the 5 January 2013 Mw 7.5 Craig strike‐slip earthquake are the focus of this special issue. They occurred along the transform boundary between the Pacific and North American plates (Fig. 1). The most identifiable feature of the plate boundary, the strike‐slip Queen Charlotte fault,...
Quality assurance testing of acoustic doppler current profiler transform matrices
Brandy Armstrong, Janice M. Fulford, Kirk G. Thibodeaux
2015, Conference Paper, 2015 IEEE/OES Eleveth Current, Waves and Turbulence Measurement (CWTM)
The U.S. Geological Survey (USGS) Hydrologic Instrumentation Facility (HIF) is nationally responsible for the design, testing, evaluation, repair, calibration, warehousing, and distribution of hydrologic instrumentation in use within the USGS Water Mission Area (WMA). The HIF's Hydraulic Laboratory has begun routine quality assurance (QA) testing and documenting the performance of...
The origin of Mauna Loa's Nīnole Hills: Evidence of rift zone reorganization
Jeffrey Zurek, Glyn Williams-Jones, Frank A. Trusdell, Simon Martin
2015, Geophysical Research Letters (42) 8358-8366
In order to identify the origin of Mauna Loa volcano's Nīnole Hills, Bouguer gravity was used to delineate density contrasts within the edifice. Our survey identified two residual anomalies beneath the Southwest Rift Zone (SWRZ) and the Nīnole Hills. The Nīnole Hills anomaly is elongated, striking northeast, and in inversions...
Automated integration of lidar into the LANDFIRE product suite
Birgit Peterson, Kurtis Nelson, Carl Seielstad, Jason M. Stoker, W. Matt Jolly, Russell Parsons
2015, Remote Sensing Letters (6) 247-256
Accurate information about three-dimensional canopy structure and wildland fuel across the landscape is necessary for fire behaviour modelling system predictions. Remotely sensed data are invaluable for assessing these canopy characteristics over large areas; lidar data, in particular, are uniquely suited for quantifying three-dimensional canopy structure. Although lidar data are increasingly...
Lithobates sylvaticus (wood frog). Habitat use.
Luke A. Groff, Aram J.K. Calhoun, Cynthia S. Loftin
2015, Herpetological Review (46) 234-234
Lithobates sylvaticus is the second most widely distributed anuran in North America (Martof and Humphries 1959. Am. Midl. Nat. 61:350–389), and its habitat use reflects the environmental variation that exists across its geographic range (Semlitsch et al. 2009. BioScience 59:853–862). Although L. sylvaticus post-breeding habitat selection has been described in...
Reticulite‐producing fountains from ring fractures in Kīlauea Caldera ca. 1500 CE
Michael May, Rebecca J. Carey, Don Swanson, Bruce F. Houghton
Rebecca Carey, Valerie Cayol, Michael P. Poland, Dominique Weis, editor(s)
2015, Book chapter, Hawaiian volcanoes: From source to surface
A widely dispersed reticulite bed occurs close to the base of the Keanakākoʻi Tephra at Kīlauea Volcano. It can be divided into six subunits in the northern sector of the volcano; the reticulite also occurs in the southern sector, but outcrops are sparse owing to penecontemporaneous erosion and burial. Multilobate isopachs for...
Variables associated with nest survival of Golden-winged Warblers (Vermivora chrysoptera) among vegetation communities commonly used for nesting
Kyle R. Aldinger, Theron M. Terhune II, Petra Bohall Wood, David A. Buehler, Marja H. Bakermans, John L. Confer, David J. Flaspohler, Jeffrey L. Larkin, John P. Loegering, Katie L. Percy, Amber M. Roth, Curtis G. Smalling
2015, Avian Conservation and Ecology (10)
Among shrubland- and young forest-nesting bird species in North America, Golden-winged Warblers (Vermivora chrysoptera) are one of the most rapidly declining partly because of limited nesting habitat. Creation and management of high quality vegetation communities used for nesting are needed to reduce declines. Thus, we examined whether common characteristics could...
Validation of geometric accuracy of Global Land Survey (GLS) 2000 data
Rajagopalan Rengarajan, Aparajithan Sampath, James C. Storey, Mike Choate
2015, Photogrammetric Engineering and Remote Sensing (2) 131-141
The Global Land Survey (GLS) 2000 data were generated from Geocover™ 2000 data with the aim of producing a global data set of accuracy better than 25 m Root Mean Square Error (RMSE). An assessment and validation of accuracy of GLS 2000 data set, and its co-registration with Geocover™ 2000...
Fluid-faulting interactions: Fracture-mesh and fault-valve behavior in the February 2014 Mammoth Mountain, California, earthquake swarm
David R. Shelly, Taka’aki Taira, Stephanie Prejean, David P. Hill, Douglas S. Dreger
2015, Geophysical Research Letters (42) 5803-5812
Faulting and fluid transport in the subsurface are highly coupled processes, which may manifest seismically as earthquake swarms. A swarm in February 2014 beneath densely monitored Mammoth Mountain, California, provides an opportunity to witness these interactions in high resolution. Toward this goal, we employ massive waveform-correlation-based event detection and relative...
Projecting the spatiotemporal carbon dynamics of the Greater Yellowstone Ecosystem from 2006 to 2050
Shengli Huang, Shuguang Liu, Jinxun Liu, Devendra Dahal, Claudia Young, Brian Davis, Terry L. Sohl, Todd Hawbaker, Benjamin M. Sleeter, Zhiliang Zhu
2015, Carbon Balance and Management (10)
BackgroundClimate change and the concurrent change in wildfire events and land use comprehensively affect carbon dynamics in both spatial and temporal dimensions. The purpose of this study was to project the spatial and temporal aspects of carbon storage in the Greater Yellowstone Ecosystem (GYE) under...
Drought monitoring and assessment: Remote sensing and modeling approaches for the Famine Early Warning Systems Network
Gabriel Senay, Naga Manohar Velpuri, Stefanie Bohms, Michael Budde, Claudia Young, James Rowland, James Verdin
2015, Book chapter
Drought monitoring is an essential component of drought risk management. It is usually carried out using drought indices/indicators that are continuous functions of rainfall and other hydrometeorological variables. This chapter presents a few examples of how remote sensing and hydrologic modeling techniques are being used to generate a suite of...
Having it both ways? Land use change in a U.S. midwestern agricultural ecoregion
Roger F. Auch, Chris R. Laingen
2015, Professional Geographer (67) 84-97
Urbanization has been directly linked to decreases in area of agricultural lands and, as such, has been considered a threat to food security. Although the area of land used to produce food has diminished, often overlooked have been changes in agricultural output. The Eastern Corn Belt Plains (ECBP) is an...
An ignimbrite caldera from the bottom up: Exhumed floor and fill of the resurgent Bonanza caldera, Southern Rocky Mountain volcanic field, Colorado
Peter W. Lipman, Matthew J. Zimmerer, William C. McIntosh
2015, Geosphere (11) 1902-1947
Among large ignimbrites, the Bonanza Tuff and its source caldera in the Southern Rocky Mountain volcanic field display diverse depositional and structural features that provide special insights concerning eruptive processes and caldera development. In contrast to the nested loci for successive ignimbrite eruptions at many large multicyclic calderas elsewhere, Bonanza...
San Andreas tremor cascades define deep fault zone complexity
David R. Shelly
2015, Nature Geoscience (8) 145-252
Weak seismic vibrations - tectonic tremor - can be used to delineate some plate boundary faults. Tremor on the deep San Andreas Fault, located at the boundary between the Pacific and North American plates, is thought to be a passive indicator of slow fault slip. San Andreas Fault tremor migrates at...
The Southern Piedmont’s continued land-use evolution, 1973–2011
Roger F. Auch, Darrell E. Napton, Kristi Sayler, Mark A. Drummond, Steven Kambly, Daniel G. Sorenson
2015, Southeastern Geographer (55) 338-361
The southern Piedmont in the U.S. was an important farming region during the 19th century, but by the end of the 20th century, agricultural land use had decreased substantially with forest becoming the majority land cover by the 1970s. Geographical literature has documented this change but has not concentrated on...
Tornadic storm avoidance behavior in breeding songbirds
Henry M. Streby, Gunnar R. Kramer, Sean M. Peterson, Justin A. Lehman, David A. Buehler, David E. Andersen
2015, Current Biology (25) 98-102
Migration is a common behavior used by animals of many taxa to occupy different habitats during different periods. Migrant birds are categorized as either facultative (i.e., those that are forced to migrate by some proximal cue, often weather) or obligate (i.e., those that migrate on a regular cycle). During migration,...
Using SO2 camera imagery and seismicity to examine degassing and gas accumulation at Kīlauea Volcano, May 2010
Patricia A Nadeau, Cynthia A. Werner, Gregory P. Waite, Simon A Carn, Ian D Brewer, Tamar Elias, Andrew Sutton, Christoph Kern
2015, Journal of Volcanology and Geothermal Research (300) 70-80
SO2 camera measurements at Kīlauea Volcano, Hawaii, in May of 2010 captured two occurrences of lava lake rise and fall within the Halema'um'au Crater summit vent. During high lava stands we observed diminished SO2 emission rates and decreased seismic tremor. Similar events at Kīlauea have been described as the result...
Predicted changes in climatic niche and climate refugia of conservation priority salamander species in the northeastern United States
William B. Sutton, Kyle Barrett, Allison T. Moody, Cynthia S. Loftin, Phillip G. deMaynadier, Priya Nanjappa
2015, Forests (6) 1-26
Global climate change represents one of the most extensive and pervasive threats to wildlife populations. Amphibians, specifically salamanders, are particularly susceptible to the effects of changing climates due to their restrictive physiological requirements and low vagility; however, little is known about which landscapes and species are vulnerable to climate change....
Denitrification in the Mississippi River network controlled by flow through river bedforms
Jesus D. Gomez-Velez, Judson W. Harvey, M. Bayani Cardenas, Brian Kiel
2015, Nature Geoscience (8) 941-945
Increasing nitrogen concentrations in the world’s major rivers have led to over-fertilization of sensitive downstream waters. Flow through channel bed and bank sediments acts to remove riverine nitrogen through microbe-mediated denitrification reactions. However, little is understood about where in the channel network this biophysical process is most efficient, why certain...
