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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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We are focused on some of the most significant issues society faces, and our science is making a substantial contribution to the well-being of the Nation and the world. Learn more about the major topics our research covers and the programs focused on those topics.

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Filter Total Items: 175538

Modeling the mid-Piacenzian warm climate using the water isotope-enabled Community Earth System Model (iCESM1.2-ITPCAS) Modeling the mid-Piacenzian warm climate using the water isotope-enabled Community Earth System Model (iCESM1.2-ITPCAS)

The mid-Piacenzian Warm Period (MPWP, ~ 3.264–3.025 Ma) is the most recent example of a persistently warmer climate in equilibrium with atmospheric CO2 concentrations similar to today. Towards studying patterns and dynamics of a warming climate the MPWP is often compared to today. Following the Pliocene Model Intercomparison Project, Phase 2 (PlioMIP2) protocol we prepare a water isotope...
Authors
Yong Sun, Baohuang Su, Harry J. Dowsett, Haibin Wu, Jun Hu, Christian Stepanek, Zhongyu Xiong, Xiayu Yuan, Gilles Ramstein
By
Ecosystems Land Change Science Program, Florence Bascom Geoscience Center

Viability modeling for decision support with limited data: A lizard case study Viability modeling for decision support with limited data: A lizard case study

Plateau spot-tailed earless lizards, Holbrookia lacerata, are a species of ground lizard in central Texas that are under review for listing as endangered under the US Endangered Species Act, but heretofore no predictive models of population dynamics or viability have been developed. We used limited available data and published demographic rates in a PVA model to predict future status of...
Authors
Ashley B.C. Goode, Nathan Allan, Conor P. McGowan
By
Cooperative Research Units

Alaskan glacial dust is an important iron source to surface waters of the Gulf of Alaska Alaskan glacial dust is an important iron source to surface waters of the Gulf of Alaska

This work evaluates glacial dust as a source of sediment, and associated iron (Fe), to the Fe-limited Gulf of Alaska (GoA). A reanalysis of GoA sediment data, using rare earth elements and thorium as provenance tracers, suggests a flux to the ocean surface of Copper River (AK) glacial dust, and associated Fe, that is comparable to the flux of dust from Asia, at least 1,000 km from the...
Authors
John Crusius, Carsten Lao, Thomas M. Holmes, J. W. Murray
By
Alaska Science Center

Thermo-hydrologic processes governing supra-permafrost talik dynamics in discontinuous permafrost near Umiujaq (Québec, Canada) 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...
Authors
Philippe Fortier, Nathan Young, Michelle A. Walvoord, Jean-Michel Lemieux, Aaron Mohammed
By
Water Resources Mission Area

A history of cryohydrogeology modeling and recent advancements through the integration of solute transport 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...
Authors
Barret L. Kurylyk, Julia Guimond, Aaron Mohammed, Victor F. Bense, Jeffrey M. McKenzie, Michelle A. Walvoord, Rob Jamieson, R. Bailey Strong
By
Water Resources Mission Area

Thermal and hydrological limitations on modeling carbon dynamics at wetland sites of discontinuous and continuous permafrost extent 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...
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
By
Ecosystems Land Change Science Program, Geology, Minerals, Energy, and Geophysics Science Center
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