Estimation of site terms in ground-motion models for California using horizontal-to-vertical spectral ratios from microtremor
Camilo Pinilla Ramos, Norman A. Abrahamson, Robert Kayen
2022, Bulletin of the Seismological Society of America (BSSA) (112) 3016-3036
The horizontal‐to‐vertical spectral ratios from microtremor (mHVSR) data obtained at 196 seismic stations in California are used to evaluate three alternative microtremor‐based proxies for site amplification for use in ground‐motion models (GMMs): the site fundamental period (f0"><span...
Rapid and gradual permafrost thaw: A tale of two sites
Burke J. Minsley, Neal Pastick, Stephanie R. James, Dana R.N. Brown, Bruce K. Wylie, Mason A. Kass, Vladimir E. Romanovsky
2022, Geophysical Research Letters (49)
Warming temperatures and increasing disturbance by wildfire and extreme weather events is driving permafrost change across northern latitudes. The state of permafrost varies widely in space and time, depending on landscape, climate, hydrologic, and ecological factors. Despite its importance, few approaches commonly measure and monitor the changes...
One Health in action: Flea control and interpretative education at Badlands National Park
David A. Eads, Lindsey Buehler, Anne Esbenshade, Jason Fly, Evan Miller, Holly Redmond, Emily Ritter, Caitlyn Tynes, Sasha Wittmann, Paul Roghair, Eddie Childers
2022, Journal of Vector Ecology (47) 227-229
One Health involves interdisciplinary collaboration to improve, protect, and preserve the health of humans, wildlife, and ecosystems, and advocates for unified approaches to One Health challenges (Buttke et al. 2015). Here, we focus on a One Health challenge of nearly global distribution: Yersinia pestis, the flea-borne bacterial agent of plague....
Postfire debris flow hazards—Tips to keep you safe
Steven Sobieszczyk, Jason W. Kean
2022, Fact Sheet 2022-3078
Often referred to as “mudflows,” debris flows are a type of landslide made up of a rapidly moving mixture of dirt, rocks, trees, and water (and sometimes ash) that start on a hillside and travel downvalley. They can easily overflow channels and severely damage houses, vehicles, or other structures. Areas...
Groundwater, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona—2018–2019
Jon P. Mason
2022, Open-File Report 2022-1086
The Navajo (N) aquifer is an extensive aquifer and the primary source of groundwater in the 5,400-square-mile Black Mesa area in northeastern Arizona. Water availability is an important issue in the Black Mesa area because of the arid climate, past industrial water use, and continued water requirements for municipal use...
Permafrost and climate change: Carbon cycle feedbacks from the warming Arctic
Edward A. Schuur, Benjamin Abbott, Roisin Commane, Jessica Ernakovich, Eugenie S. Euskirchen, Gustaf Hugelius, Guido Grosse, Miriam C. Jones, Charlie Koven, Victor Leyshk, David J Lawrence, Michael M Loranty, Marguerite Mauritz, David Olefeldt, Susan M Natali, Heidi Rodenhizer, Verity Salmon, Christina Schädel, Jens Strauss, Claire C. Treat, Merritt Turetsky
2022, Annual Review of Earth Science (47) 343-371
Rapid Arctic environmental change affects the entire Earth system as thawing permafrost ecosystems release greenhouse gases to the atmosphere. Understanding how much permafrost carbon will be released, over what time frame, and what the relative emissions of carbon dioxide and methane will be is key for understanding the impact on...
On the documentation, independence, and stability of widely used seismological data products
Boris Rosler, Seth Stein, Susan E. Hough
2022, Frontiers in Earth Science (10)
Earthquake scientists have traditionally relied on relatively small data sets recorded on small numbers of instruments. With advances in both instrumentation and computational resources, the big-data era, including an established norm of open data-sharing, allows seismologists to explore important issues using data volumes that would have been unimaginable in earlier...
Comparative behavioral ecotoxicology of Inland Silverside larvae exposed to pyrethroids across a salinity gradient
Sara Hutton, Samreen Siddiqui, Emily Pedersen, Christopher Markgraf, Amelie Segarra, Michelle L. Hladik, Richard E Connon, Susanne M. Brander
2022, Science of the Total Environment (857)
Pyrethroids, a class of commonly used insecticides, are frequently detected in aquatic environments, including estuaries. The influence that salinity has on organism physiology and the partitioning of hydrophobic chemicals, such as pyrethroids, has driven interest in how toxicity changes in saltwater compared to freshwater. Early life exposures in fish to...
It’s time for focused in situ studies of planetary surface-atmosphere interactions
Serina Diniega, Nathan Barba, Louis Giersch, Brian Jackson, Alejandro Soto, Don Banfield, Mackenzie D. Day, Gary Doran, Colin M. Dundas, Michael Mischna, Scot Rafkin, Isaac B. Smith, Rob Sullivan, Christy Swann, Timothy N. Titus, Ian J. Walker, Jacob Widmer, Devon M. Burr, Lukas Mandrake, Nathalie Vriend, Kaj E. Williams
2022, Conference Paper, 2022 IEEE Aerospace Conference (AERO)
A critical gap in planetary observations has been in situ characterization of extra-terrestrial, present-day atmospheric and surface environments and activity. While some surface activity has been observed and some in situ meteorological measurements have been collected by auxiliary instruments on Mars, existing information is insufficient to conclusively characterize the natural...
The Grand Caddis hatch of JASM 2022: Trichoptera natural history observations at the Joint Aquatic Sciences Meeting in Grand Rapids, Michigan (USA)
Anya Metcalfe, Angelika L. Kurthen, Jared Freedman, Alexander B. Orfinger
2022, Limnology and Oceanography Bulletin (31) 101-106
In a stroke of good luck for aquatic scientists and insect enthusiasts, the May 2022 Joint Aquatic Sciences Meeting (JASM) in Grand Rapids, Michigan coincided with a spectacular hatch of hydropsychid caddisflies. To estimate density, we enumerated caddisflies on 12 polarized window panels on the western face of the DeVos...
Drivers of Pb, Sb and As release from spent gunshot in wetlands: Enhancement by organic matter and native microorganisms
Anna Potysz, Lukasz J. Binkowski, Jakub Kierczak, Barnett A. Rattner
2022, Science of the Total Environment (857)
In many countries the use of lead-based ammunition is prevalent, and results in exposure and poisoning of waterfowl and other species of birds. In waterfowl hunting areas large quantities of spent shot may be deposited in wetland and terrestrial habitats. These pellets can undergo transformation, which are influenced by various...
Lessons learned from wetlands research at the Cottonwood Lake Study Area, Stutsman County, North Dakota, 1967–2021
David M. Mushet, Ned H. Euliss Jr., Donald O. Rosenberry, James W. LaBaugh, Sheel Bansal, Zeno F. Levy, Owen P. McKenna, Kyle McLean, Christopher T. Mills, Brian P. Neff, Richard D. Nelson, Matthew J. Solensky, Brian Tangen
2022, Professional Paper 1874
Depressional wetlands in the Prairie Pothole Region of North America have a long history of investigation owing to their importance in maintaining migratory-bird populations, especially waterfowl. One area of particularly intensive study is the Cottonwood Lake study area in Stutsman County, North Dakota. Studies at the Cottonwood Lake study area...
Physical properties of the crust influence aftershock locations
Jeanne L. Hardebeck
2022, JGR Solid Earth (10)
Aftershocks do not uniformly surround a mainshock, and instead occur in spatial clusters. Spatially variable physical properties of the crust may influence the spatial distribution of aftershocks. I study four aftershock sequences in Southern California (1992 Landers, 1999 Hector Mine, 2010 El Mayor—Cucapah, and 2019 Ridgecrest) to investigate which physical...
Negligible atmospheric release of methane from decomposing hydrates in mid-latitude oceans
DongJoo Joung, Carolyn D. Ruppel, John R. Southon, Thomas S. Weber, John D. Kessler
2022, Nature Geoscience (15) 885-891
Naturally occurring gas hydrates may contribute to a positive feedback for global warming because they sequester large amounts of the potent greenhouse gas methane in ice-like deposits that could be destabilized by increasing ocean/atmospheric temperatures. Most hydrates occur within marine sediments; gas liberated during the decomposition of seafloor hydrates or...
Tectonic subsidence modeling of diachronous transition from backarc to retroarc basin development and uplift during Cordilleran orogenesis, Patagonian-Fuegian Andes
Rebecca A. VanderLeest, Julie C. Fosdick, Matthew A. Malkowski, Brian W. Romans, Matias C. Ghiglione, Theresa Maude Schwartz, Zachary T. Sickmann
2022, Tectonics (41)
Backstripped tectonic basin subsidence histories are critical for interpreting phases of lithospheric deformation and paleoenvironmental change from the stratigraphic record. This study presents new subsidence modeling of the Rocas Verdes Backarc Basin (RVB) and Magallanes-Austral retroarc foreland basin (MAB) of southernmost South America to evaluate along-strike changes in tectonic subsidence...
A geophysical characterization of structure and geology of the Northern Granite Springs Valley Geothermal System, Northwestern Nevada
Jonathan M.G. Glen, Jared R. Peacock, Tait E. Earney, William Schermerhorn, Drew L. Siler, James Faulds, Jacob DeAngelo
2022, Geothermal Resources Council Transactions (46) 700-720
The northern Granite Springs Valley in northwestern Nevada is the focus of recent studies for its potential for hosting undiscovered geothermal resources. Although the area lacks definitive surface manifestations of an active hydrothermal system, previous studies identify this region as having potential for hosting a blind geothermal resource, based on...
Simulation experiments comparing nonstationary design-flood adjustments based on observed annual peak flows in the conterminous United States
Jory Seth Hecht, Nancy A. Barth, Karen R. Ryberg, Angela Gregory
2022, Journal of Hydrology X (17)
While nonstationary flood frequency analysis (NSFFA) methods have proliferated, few studies have rigorously compared them for modeling changes in both the central tendency and variability of annual peak-flow series, also known as the annual maximum series (AMS), in hydrologically diverse areas. Through Monte Carlo experiments, we appraise five methods...
Formation of orogenic gold deposits by progressive movement of a fault-fracture mesh through the upper crustal brittle-ductile transition zone
Miguel Tavares Nassif, Thomas Monecke, T. James Reynolds, Yvette D. Kuiper, Richard J. Goldfarb, Sandra Piazolo, Heather A. Lowers
2022, Scientific Reports (12)
Orogenic gold deposits are comprised of complex quartz vein arrays that form as a result of fluid flow along transcrustal fault zones in active orogenic belts. Mineral precipitation in these deposits occurs under variable pressure conditions, but a mechanism explaining how the pressure regimes evolve through...
Hydrologic recovery after wildfire: A framework of approaches, metrics, criteria, trajectories, and timescales
Brian A. Ebel, Joseph W. Wagenbrenner, Alicia M. Kinoshita, Kevin D. Bladon
2022, Journal of Hydrology and Hydromechanics (70) 388-400
Deviations in hydrologic processes due to wildfire can alter streamflows across the hydrograph, spanning peak flows to low flows. Fire-enhanced changes in hydrologic processes, including infiltration, interception, and evapotranspiration, and the resulting streamflow responses can affect water supplies, through effects on the quantity, quality, and timing of water availability. Post-fire...
Mechanisms and magnitude of dissolved silica release from a New England salt marsh
Olivia Williams, Andrew C. Kurtz, Meagan J. Eagle, Kevin D. Kroeger, Joseph Tamborski, Joanna C. Carey
2022, Biogeochemistry (161) 251-271
Salt marshes are sites of silica (SiO2) cycling and export to adjacent coastal systems, where silica availability can exert an important control over coastal marine primary productivity. Mineral weathering and biologic fixation concentrate silica in these systems; however, the relative contributions of geologic versus biogenic silica...
Melanism in a Common Murre Uria aalge in Kachemak Bay, Alaska
Sarah K. Schoen, Mayumi L. Arimitsu, Caitlin Elizabeth Marsteller, Brielle M. Heflin
2022, Marine Ornithology: Journal of Seabird Research and Conservation (50) 225-227
In accord with melanism being uncommon in birds, we could find only six published records of completely melanistic Common Murres Uria aalge, one of the most widely and intensively studied of all seabirds. We added to the record by observing a Common Murre in completely dark, melanistic alternate plumage every summer...
Sources and characteristics of dissolved organic carbon in the McKenzie River, Oregon, related to the formation of disinfection by-products in treated drinking water
Kurt D. Carpenter, Tamara E. C. Kraus, Angela M. Hansen, Bryan D. Downing, Jami H. Goldman, Jonathan Haynes, David Donahue, Karl Morgenstern
2022, Scientific Investigations Report 2022-5010
Executive SummaryThis study characterized the concentration and quality of dissolved organic carbon (DOC) in the McKenzie River, a relatively undeveloped watershed in western Oregon, and its link to forming disinfection by-products (DBPs) in treated drinking water. The study aimed to identify the primary source(s) of DOC in source water...
Taxonomic boundaries in Lesser Treeshrews (Scandentia, Tupaiidae: Tupaia minor)
M. M. Juman, Neal Woodman, A. Miller-Murthy, Link E. Olson, E. J. Sargis
2022, Journal of Mammalogy (103) 1431-1440
The Lesser Treeshrew, Tupaia minor Günther, 1876, is a small mammal from Southeast Asia with four currently recognized subspecies: T. m. minor from Borneo; T. m. malaccana from the Malay Peninsula; T. m. humeralis from Sumatra; and T. m. sincepis from Singkep Island and Lingga Island. A fifth subspecies, T. m. caedis, was...
Peer review by and for non-native English speakers: Interacting across international limnology societies
Mary R. Gradoville, Bridget R. Deemer, Renee M. van Dorst
2022, Bulletin Limnology and Oceanography (31) 127-128
Scholarly peer review is critical to the scientific process, yet there are limited resources available for students, postdocs, and other early career researchers (ECRs) to learn how to perform effective and time-efficient review. The ASLO Raelyn Cole Editorial Fellows have developed several peer review training resources, including a webinar (<a...
Inversions of landslide strength as a proxy for subsurface weathering
Stefano Alberti, Ben Leshchinksy, Joshua J. Roering, Jonathan P. Perkins, Michael Olsen
2022, Nature Communications (13)
Distributions of landslide size are hypothesized to reflect hillslope strength, and consequently weathering patterns. However, the association of weathering and critical zone architecture with mechanical strength properties of parent rock and soil are poorly-constrained. Here we use three-dimensional stability to analyze 7330 landslides in western Oregon to infer combinations of...
