Conference Papers
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Brodifacoum isomer formulations with potentially lower risk to non-target wildlife
Anticoagulant rodenticides (ARs) have a long history of successful use in controlling vertebrate pest and invasive species. Despite regulatory efforts to mitigate risk, non-target wildlife may be unintentionally exposed to ARs through various trophic pathways, and depending on dose, exposure can result in adverse effects and mortality. Second-generation ARs (SGARs) are mixtures of cis- and trans-d
Authors
Barnett A. Rattner, Richard A. Erickson, Julia S. Lankton, Etienne Benoit, Virginie Lattard
Automated deep learning-based point cloud classification on USGS 3DEP lidar data using transformer
The goal of the U.S. Geological Survey’s (USGS) 3D Elevation Program (3DEP) is to facilitate the acquisition of nationwide lidar data. Although data meet USGS lidar specifications, some point cloud tiles include noisy and incorrectly classified points. The enhanced accuracy of classified point clouds can improve support for many downstream applications such as hydrologic analysis, urban planning,
Authors
Jung-Kuan (Ernie) Liu, Rongjun Qin, Shuang Song
Airborne gamma-ray spectrometry inversion signatures of Hicks Dome area
No abstract available.
Authors
Jessica Weihermann, Yaoguo Li, Anne E. McCafferty
3-D mapping of the conterminous U.S. within the USGS National Cooperative Geologic Mapping Program: Progress and future prospects
The U.S. Geological Survey (USGS) National Cooperative Mapping Program (NCGMP) is bringing together subsurface and three-dimensional information at multiple scales for the conterminous United States from data produced throughout the USGS and by federal and state partners. Components of this work include data inventory and catalog development, data integration and database development, and construc
Authors
Donald S. Sweetkind
Permafrost history in the sporadic zone as context for recent carbon loss using acryostratigraphy, plant macrofossil, and stable isotope approach
Permafrost and landscape history, in addition to ground ice content, are increasingly identified as important components in predicting permafrost thaw trajectories. Together with cryostratigraphy, plant remains and stable isotopes can provide useful information about past permafrost aggradation and thaw. We applied these methods with radiocarbon dating on peat and permafrost cores in the sporadic
Authors
Miriam C. Jones, Lesleigh Anderson, Eva Anne Stephani, Benjamin M. Jones
Thermo-hydrologic processes governing supra-permafrost talik dynamics in discontinuous permafrost near Umiujaq (Québec, Canada)
Widespread supra-permafrost talik formation is
currently recognized as a critical mechanism that
could accelerate permafrost thaw in the Arctic
(e.g., Connon et al. 2018; Farquharson et al. 2022).
However, the trajectory of permafrost dynamics
following talik formation may prove difficult to predict.
Physically-based cryohydrogeologic models provide
a powerful tool for understanding processes and
Authors
Philippe Fortier, Nathan Young, Michelle A. Walvoord, Jean-Michel Lemieux, Aaron Mohammed
A history of cryohydrogeology modeling and recent advancements through the integration of solute transport
Groundwater flow systems and permafrost are interrelated because permafrost thaw enhances permeability, while groundwater flow can advect heat and accelerate permafrost thaw (McKenzie et al. 2021). Given amplified climate change in cold regions, there is renewed interest in ‘cryohydrogeology’, the study of groundwater in cold regions. Many data-driven studies have shown that permafrost thaw is lea
Authors
Barret L. Kurylyk, Julia Guimond, Aaron Mohammed, Victor F. Bense, Jeffrey M. McKenzie, Michelle A. Walvoord, Rob Jamieson, R. Bailey Strong
Thermal and hydrological limitations on modeling carbon dynamics at wetland sites of discontinuous and continuous permafrost extent
Accurate representation of cryohydrological processes is fundamental for biosphere models, particularly at high-latitudes, given their influence on carbon and permafrost dynamics in carbon-rich peatlands and wetlands. This study analyzes site-level simulations in moist and wet drainage conditions in continuous or discontinuous permafrost regions, using a terrestrial ecosystem model DVM-DOS-TEM. Fu
Authors
Benjamin C. Maglio, Ruth Rutter, Tobey Carman, Colin W. Edgar, Eugénie S. Euskirchen, Hélène Genet, Andrew Mullen, Valeria Briones, Elchin Jafarov, Kristen L. Manies
3-D mapping of the conterminous U.S. within the USGS US GeoFramework Initiative: A status report
No abstract available.
Authors
Donald S. Sweetkind
Using surficial geologic maps, vegetation, and monitoring to address erosion impacts from grazing in Channel Islands National Park, California
Employing a map-unit classification scheme based on geomorphic process and age, the U.S. Geological Survey (USGS) mapped Quaternary surficial deposits of the five islands comprising Channel Islands National Park (CHIS), California, as no such maps previously existed. Mapping was motivated through an agreement with the National Park Service (NPS) to aid natural resource assessments, including post-
Authors
Kevin Schmidt, Scott A. Minor, Kathryn McEachern
Towards entity-aware conditional variational inference for heterogeneous time-series prediction: An application to hydrology
Many environmental systems (e.g., hydrology basins) can be modeled as entity whose response (e.g., streamflow) depends on drivers (e.g., weather) conditioned on their characteristics (e.g., soil properties). We introduce Entity-aware Conditional Variational Inference (EA-CVI), a novel probabilistic inverse modeling approach, to deduce entity characteristics from observed driver-response data. EA-C
Authors
Rahul Ghosh, Wallace (Andy) Mcaliley, Arvind Renganathan, Michael Steinbach, Christopher Duffy, Vipin Kumar
Revisiting geophysical interpretations of the Midcontinent Rift below Lake Superior— Insights from GLIMPCE seismic-reflection line C
The 1.1 Ga Midcontinent Rift System (MRS) has been investigated in the Lake Superior region for more than a century. The most influential geophysical data for modern paradigms has come from seismic-reflection profiles collected by the Great Lakes International Multidisciplinary Program on Crustal Evolution (GLIMPCE) in the late 1980s. We are revisiting seismic-reflection GLIMPCE line C by construc
Authors
V. J. S. Grauch, Samuel J. Heller, Laurel G. Woodruff, Esther K. Stewart