Coastal permafrost erosion
Benjamin M. Jones, Anna M. Irrgang, Louise M. Farquharson, Hugues Lantuit, Dustin Whalen, Stanislav Ogorodov, Mikhail Grigoriev, Craig E. Tweedie, Ann E. Gibbs, Matt C Strzelecki, Alisa Baranskaya, Nataliya Belova, Anatoly Sinitsyn, Art Kroon, Alexey Maslakov, Goncalo Vieira, Guido Grosse, Paul Overduin, Ingmar Nitze, Christopher V. Maio, Jacquelyn R. Overbeck, Mette Bendixen, Piotr Zagorski, Vladimir Romanovsky
2020, Report
Highlights• Since the early 2000s, erosion of permafrost coasts in the Arctic has increased at 13 of 14 sites with observational data that extend back to ca. 1960 and ca. 1980, coinciding with warming temperatures, sea ice reduction, and permafrost thaw.• Permafrost coasts along the US and Canadian Beaufort Sea...
Geologic map of the Dog River and northern part of the Badger Lake 7.5′ quadrangles, Hood River County, Oregon
Jason D. McClaughry, William E. Scott, Carlie J. M. Duda, Richard M. Conrey
2020, Geological Map 126
The Dog River and northern part of the Badger Lake 7.5' quadrangles encompasses an area of ~201 km2 (77.6 mi2) of the High Cascades of north-central Oregon, lying across the eastern slopes of Mount Hood volcano (Figure 1-1; Plate 1; referred to herein as Dog River–Badger Lake area). Mount Hood,...
Biology characterization breakout report
Amanda Demopoulos, Daniel Wagner, Amy Baco-Taylor, David Itano, Diva Amon, Erik E. Cordes, Lisa Levin, Peter H. Edwards, Randall Kosaki, Shirley Pomponi, Steve Gittings
2020, Conference Paper, Report on the Workshop to Identify National Ocean Exploration Priorities in the Pacific
The primary goal of the biology characterization breakout group was to identify the strategies, tools, data priorities, and key partnerships needed to conduct baseline biological characterizations of deep-sea benthic environments across the U.S. EEZ in the Pacific. Discussions focused primarily on priorities for the characterization of deep-water (>200-meter depths) benthic biological...
Evaluating and optimizing the use of logistic regression for tree mortality models in the First Order Fire Effects Model (FOFEM)
C. Alina Cansler, Sharon Hood, J. Morgan Varner, Phillip J. van Mantgem
Sharon M. Hood, Stacy Drury, Toddi A Steelman, Ron Steffens, editor(s)
2020, Conference Paper, Proceedings of the Fire Continuum-Preparing for the future of wildland fire
Wildland fires burn millions of forested hectares annually around the world, affecting biodiversity, carbon storage, hydrologic processes, and ecosystem services largely through fire-induced tree mortality (Bond-Lamberty et al. 2007; Dantas et al. 2016). In spite of this widespread importance, the underlying mechanisms of fire-caused tree mortality remain poorly understood, (Hood...
America’s offshore critical mineral wealth
Bureau of Ocean Energy Management, United States Geological Survey
2020, Report
No abstract available....
Recent planform changes in the Upper Mississippi River
James T. Rogala, Faith A. Fitzpatrick, Jon S. Hendrickson
2020, Long Term Resource Monitoring Technical Report LTRM-2019GC8
Geomorphic changes in the Upper Mississippi River (UMR) have long been a concern of river agencies charged with maintaining and restoring river habitat (GREAT 1980; Jackson et al. 1981; USFWS 1992). Large meandering alluvial rivers like the UMR are expected to constantly change and adjust their fluvial landforms within their...
2020 Four-band aerial imagery testing and acquisition for 2020 land cover/land use mission
Larry R. Robinson
2020, Long Term Resource Monitoring Technical Report LTRM-2018CAM4
The aerial camera testing project lays the groundwork for the collection of aerial imagery that will be used in the creation of the next iteration of systemic land cover/land use data for the Upper Mississippi River System. Prior to acquisition in the summer of 2020, the new 4-band aerial camera...
Yellowstone River Compact Commission sixty-ninth annual report 2020
Seth Davidson
2020, Report
No abstract available....
Extension directions in the Colorado River extensional corridor compared to fragmentation of a structurally disrupted caldera in the Sacramento Mountains, southeastern California
Keith A. Howard, Charles A. Ferguson
2020, Conference Paper, Changing facies: Desert symposium 2020
The northwest trend of the southern Colorado River extensional corridor in the southwestern USA veers northward between 34° and 35° north latitude. The tilt axes of early Miocene west-tilted volcanic strata in the west-central Sacramento Mountains mirror this bend. Steeply dipping early Miocene strata and volcanics north and south of...
He-CO2-N2 isotope and relative abundance characterization of geothermal fluids from the Ethiopian Rift
S. A. Halldorsson, P. Scarsi, T. Abebe, T. Evans, Justin T. Kulongoski, P. R. Castillo, P. H. Barry
2020, Conference Paper, Proceedings World Geothermal Congress 2020+1
We report He-CO2-N2 isotopic and relative abundances in free gases and dissolved gas phase of geothermal fluids from the Ethiopian Rift. Fluid samples were collected from ~30 geothermal localities from three key regions throughout rifted and non-rifted areas of Ethiopia. The majority of samples, including off-rift samples, indicate a strong...
Landslide guide for residents of Puerto Rico
Lindsay A. Davis, Jocelyn West, Lori Peek, K. Stephen Hughes, James Joyce, William H. Schulz, Jonathan W. Godt, Darysabel Perez Martinez, Gisela Baez Sanchez, Glorymar Gomez Perez, Carolina Hincapie Cardenas, Christa von Hillebrandt, Lorna Jaramillo-Nieves, Jenniffer Santos-Hernandez, Raquel Lugo Bendezu, Yahaira Alvarez Gandia
2020, Report
No abstract available....
Reconnaissance map of the Cenozoic geology in the Carlin basin area, Elko and Eureka counties, Nevada
Alan R. Wallace
2020, Nevada Bureau of Mines and Geology Open File Report 2020-02
The middle Miocene Carlin sedimentary basin encompasses a large area between the Adobe Range to the east, the Piñon Range to the south, the southern Independence Mountains and Marys Mountain to the west, and Swales Mountain to the north. The town of Carlin is in the southern part of the...
Improving the positional and vertical accuracy of named summits above 13,000 ft in the United States
Samantha Arundel, Gaurav Sinha, Arthur Chan
2020, Conference Paper, AutoCarto 2020 presentations
The National Map (TNM) portal provides public access to U.S. Geological Survey (USGS) high-resolution topographic datasets, and maps from the Historical Topographic Map Collection (HTMC). Elevation values shown on HTMC maps were obtained from ground spot elevation measurements, as compared to today’s elevation measurements derived from more efficient methods, such...
Fault trace mapping and surface-fault-rupture special study zone delineation of the Wasatch Fault Zone, Utah and Idaho
Greg N. McDonald, Emily J. Kleber, Adam I. Hiscock, S. Bennett, Steve D. Bowman
2020, Report, Report of Investigation 280
The Wasatch fault zone (WFZ) is a 220-mile-long (350-km) fault zone divided into 10 structural segments extending from southeastern Idaho to central Utah. The central five segments of the WFZ underlie the densely populated Wasatch Front region, where the majority of Utah’s population and economy are proximal to the fault...
Estuarine habitat use by White Sturgeon (Acipenser transmontanus)
Oliver Patton, Veronica L. Violette, Matthew J. Young, Frederick V. Feyrer
2020, San Francisco Estuary & Watershed Science (18)
White Sturgeon (Acipenser transmontanus), a species of concern in the San Francisco Estuary, is in relatively low abundance due to a variety of factors. The purpose of our study was to identify the estuarine habitat used by White Sturgeon to aid in the conservation and management of the species locally...
Hatchling emergence ecology of Ouachita map turtles (Graptemys ouachitensis) on the lower Wisconsin River, Wisconsin, USA
Gregory A Geller, Gary S Casper, Brian J. Halstead
2020, Chelonian Conservation and Biology (19) 217-235
Despite its biological importance in shaping both individual fitness and population structure, much remains to be learned about the hatchling emergence ecology of most freshwater turtles. Here, we provide some of the first details on these early life stages for the Ouachita map turtle (Graptemys...
Machine learning for natural resource assessment: An application to the blind geothermal systems of Nevada
Stephen C. Brown, Mark F. Coolbaugh, Jacob DeAngelo, James E. Faulds, Michael Fehler, Chen Gu, John H. Queen, Sven Treitel, Connor M. Smith, Eli Mlawsky
2020, Conference Paper, Geothermal Resources Council Transactions
A study is underway to apply machine learning methods to evaluate natural resource potential. In particular, we are considering the search for blind geothermal systems in Nevada. Beginning with the data and experience from the previous Nevada play fairway analysis project, we are building models in TensorFlow/Keras and gaining experience...
Occurrence of a suite of stream-obligate amphibians in timberlands of Mendocino County, California, examined using environmental DNA
Brian J. Halstead, Caren S. Goldberg, Robert B Douglas, Patrick M. Kleeman, David W Ulrich
2020, Northwestern Naturalist (101) 194-209
Stream-obligate amphibians are important indicators of ecosystem health in the Pacific Northwest, but distributional information to improve forest management is lacking in many regions. We analyzed archived DNA extracted from water samples in 60 pools in streams on private timberlands in Mendocino County, California, for...
New operational national satellite burned area product
Todd Hawbaker, Melanie K. Vanderhoof, Gail L. Schmidt, Yen-Ju G. Beal, Joshua J. Picotte, Joshua Takacs, Jeff T. Falgout, John L. Dwyer
2020, Report
Introduction Lack of consistent spatial and temporal fire information with relevant spatial resolution hinders land management and broad-scale assessments of fire activity, especially in the eastern United States and the Great Plains where fi re is important ecologically and culturally. Remote sensing can be used to monitor fi re activity, augment...
Semantically enabling map projections knowledge
E. Lynn Usery
2020, Cartography and Geoinformation (19) 66-77
Map projections are an area of cartography with a firm mathematical foundation for their creation and display providing a basis for a knowledge representation. Using only variations on a single equation set, an infinite number of projections can be created, but less than 100 are in active use. Because each...
Dispersal of hatchling Ouachita map turtles (Graptemys ouachitensis) from natural nests on the lower Wisconsin River, Wisconsin, USA
Gregory A Geller, Gary S Casper, Brian J. Halstead
2020, Chelonian Conservation and Biology (19) 236-245
Despite its importance to individual fitness and population dynamics, the dispersal behaviors of most neonate freshwater turtles after nest emergence are poorly known. We studied the initial dispersal tendencies of neonate Ouachita map turtles (Graptemys ouachitensis) exiting natural nests during 2015–2017 along the Wisconsin River,...
Using gravity to map faults and basins in the Mojave Desert, California
Victoria Langenheim
2020, Mojave Science Newsletter 9-14
No abstract available....
Vapor-bubble growth in olivine-hosted melt inclusions
Daniel J. Rasmussen, Terry Plank, Paul J. Wallace, Megan Newcombe, Jacob B. Lowenstern
2020, American Mineralogist (105) 1898-1919
Melt inclusions record the depth of magmatic processes, magma degassing paths, and volatile budgets of magmas. Extracting this information is a major challenge. It requires determining melt volatile contents at the time of entrapment when working with melt inclusions that have suffered post-entrapment modifications. Several processes decrease internal melt inclusion...
Assessment of methods for soil monitoring in the Adirondack region of New York
Gregory B. Lawrence, Michael R. Antidormi
2020, Report
Repeated sampling to detect changes in forest soils was rarely used before 1990, but the value of soil monitoring in understanding environmental change is becoming well established. The growing number of resampling studies has shown that sampling designs and procedures must be adapted to the objectives of the monitoring...
Conservation genetics of imperiled striped whipsnake in Washington
David S. Pilliod, Lisa A. Hallock, Mark P. Miller, Thomas D. Mullins, Susan M. Haig
2020, Herpetological Conservation and Biology (15) 597-610
Conservation of wide-ranging species is aided by population genetic information that provides insights into adaptive potential, population size, interpopulation connectivity, and even extinction risk in portions of a species range. The Striped Whipsnake (Masticophis taeniatus) occurs across 11 western U.S. states and into Mexico but has experienced population declines...
