Publications
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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Equilibrium line altitudes, accumulation areas, and the vulnerability of glaciers in Alaska Equilibrium line altitudes, accumulation areas, and the vulnerability of glaciers in Alaska
The accumulation area ratio (AAR) of a glacier reflects its current state of equilibrium, or disequilibrium, with climate and its vulnerability to future climate change. Here, we present an inventory of glacier-specific annual accumulation areas and equilibrium line altitudes (ELAs) for over 3000 glaciers in Alaska and northwest Canada (88% of the regional glacier area) from 2018 to 2022...
Authors
Lucas Zeller, Daniel J McGrath, Louis C. Sass, Caitlyn Florentine, Jacob Downs
Estimating indicators of cyanobacterial harmful algal blooms in New York State Estimating indicators of cyanobacterial harmful algal blooms in New York State
Cyanobacteria harmful algal blooms (cyanoHABs) are a global concern for aquatic ecosystem and human health. Limited funding for monitoring programs and inconsistent determination of cyanoHAB occurrence present challenges for identifying commonly effective variables for characterizing cyanoHABs and the development of generalized models. We compiled a combination of water quality...
Authors
Philip Savoy, Rebecca Michelle Gorney, Jennifer L. Graham
Fast or slow: An evaluation of Ti-in-quartz diffusion coefficients through comparisons of quartz and plagioclase diffusion times Fast or slow: An evaluation of Ti-in-quartz diffusion coefficients through comparisons of quartz and plagioclase diffusion times
Diffusion geochronometry using Ti-in-quartz has become a valuable method in understanding the evolution of silicic magmas. However, four different options for Ti diffusivity (DTi) currently exist, spanning three orders of magnitude, resulting in substantially different estimated times and interpretations. We present Ti-in-quartz diffusion times for the Cerro Galán Ignimbrite using the...
Authors
Sophia Wang, Guilherme Gualda, Jordan Edward Lubbers, Adam Kent
Neural network-based temporal ensembling of water depth estimates derived from SuperDove Images Neural network-based temporal ensembling of water depth estimates derived from SuperDove Images
CubeSats provide a wealth of high-frequency observations at a meter-scale spatial resolution. However, most current methods of inferring water depth from satellite data consider only a single image. This approach is sensitive to the radiometric quality of the data acquired at that particular instant in time, which could be degraded by various confounding factors, such as sun glint or...
Authors
Milad Niroumand-Jadidi, Carl J. Legleiter, Francesca Bovolo
Uncertainty quantification of geophysical and hydrologic parameters estimated from borehole nuclear magnetic resonance data Uncertainty quantification of geophysical and hydrologic parameters estimated from borehole nuclear magnetic resonance data
Borehole nuclear magnetic resonance (bNMR) data are typically used to infer in situ hydrologic properties. Partial water content as a function of pore size is estimated by fitting the measured NMR response to a multi-exponential T2 distribution, and the sum of estimated T2 amplitudes equals the total volumetric water content. From these estimated parameters, several empirical...
Authors
Burke J. Minsley, Stephanie N. Phillips, Stephanie R. James
The North American greenhouse gas budget: Emissions, removals, and integration for CO2, CH4, and N2O (2010–2019): Results From the Second REgional Carbon Cycle Assessment and Processes Study (RECCAP2) The North American greenhouse gas budget: Emissions, removals, and integration for CO2, CH4, and N2O (2010–2019): Results From the Second REgional Carbon Cycle Assessment and Processes Study (RECCAP2)
Accurate accounting of greenhouse-gas (GHG) emissions and removals is central to tracking progress toward climate mitigation and for monitoring potential climate-change feedbacks. GHG budgeting and reporting can follow either the Intergovernmental Panel on Climate Change methodologies for National Greenhouse Gas Inventory (NGHGI) reporting or use atmospheric-based “top-down” (TD)...
Authors
Benjamin Poulter, Guillermo Murray-Tortarolo, Daniel J. Hayes, Philippe Ciais, Robbie M. Andrew, Ana Bastos, Brendan Byrne, David Butman, Josep G. Canadell, Abhishek Chatterjee, Grant Domke, Andrew F. Feldman, Kelsey Foster, Neha Hunka, Robert B. Jackson, Werner A. kurz, Ayia Lindquist, Maodian Liu, Ingrid Luijkx, Arnaud Mialon, Anna M. Michalak, John Miller, Wolfgang A. Obermeier, Naiqin Pan, James T. Randerson, Peter A. Raymond, Pierre Regnier, Laure Resplandy, Gerard Rocher-Ros, Nemesio Rodriquez-Fernandez, Judith A. Rosentreter, Julio Cesar Salazar-Neira, Suzanne E. Tank, Hanqin Tan, Rodrigo Vargas, Yohanna Villalobos, Jonathan A. Wang, Xinyuan Wei, Kimberly Wickland, Christopher J. Williams, Lisamarie Windham-Myers, Christopher W. Woodall, Qing Ying, Zhen Zhang
Linking tidal-creek sediment fluxes to vertical sediment accretion in a restored salt marsh Linking tidal-creek sediment fluxes to vertical sediment accretion in a restored salt marsh
Despite growing interest and investment in salt-marsh restoration, relatively few marshes subjected to restoration efforts have been systematically monitored to assess physical restoration trajectory or success. In south San Francisco Bay, CA, USA, where 83% of wetlands were lost via human manipulation, the largest wetland restoration effort on the U.S. west coast is currently underway...
Authors
Daniel J. Nowacki, Jessica R. Lacy, SeanPaul La Selle
Identical sequence types of Yersinia ruckeri associated with lethal disease in wild-caught invasive Blue Catfish and cultured hybrid catfish (Channel Catfish ♀ × Blue Catfish ♂) from disparate aquatic ecosystems Identical sequence types of Yersinia ruckeri associated with lethal disease in wild-caught invasive Blue Catfish and cultured hybrid catfish (Channel Catfish ♀ × Blue Catfish ♂) from disparate aquatic ecosystems
Objective The Blue Catfish Ictalurus furcatus is commonly raised in warmwater aquaculture in the United States to produce Channel Catfish I. punctatus × Blue Catfish hybrids. It is also a prominent aquatic invasive species of concern in the mid-Atlantic region of the United States. Here, Yersina ruckeri was isolated from moribund Blue Catfish and hybrid catfish from disparate regions of...
Authors
Christine L. Densmore, Madeleine Hendrix, Stephen Reichley, Clayton D. Raines, Noah Bressman, Zachary Crum, Lester Khoo, Geoffrey Waldbieser, Matt Griffin, Timothy J Welch, Luke R. Iwanowicz
Nanometer-scale relationships between sedimentary organic matter molecular composition, fluorescence, cathodoluminescence, and reflectance: The importance of oxygen content at low thermal maturities Nanometer-scale relationships between sedimentary organic matter molecular composition, fluorescence, cathodoluminescence, and reflectance: The importance of oxygen content at low thermal maturities
Molecular characterization of sedimentary organic matter (SOM), termed macerals, is a common goal when seeking to understand petroleum generation as well as other geologic processes in deep time. However, unambiguous measurement of discrete macerals is challenging due to the small size of organic particles in sedimentary rocks, the proximity of different organic matter types to one...
Authors
Aaron M. Jubb, Paul C. Hackley, Ryan J. McAleer, Jing Qu
Streamflow response to glacier mass loss varies with basin precipitation across Alaska Streamflow response to glacier mass loss varies with basin precipitation across Alaska
Diminishing glaciers affect streamflow, and given the extent of glaciers in Alaska and adjacent Canada, continued glacier mass loss is likely to have profound effects on ecosystems sensitive to runoff. The effects of glacier mass loss on streamflow are likely to vary across the wide ranges of basin size, glacier cover, and precipitation in this region. In this study, we use U.S...
Authors
Janet H. Curran, Brianna Rick, Jeremy Littell, Louis C. Sass
Optimizing control of a freshwater invader in time and space Optimizing control of a freshwater invader in time and space
The global spread of invasive species in aquatic ecosystems has prompted population control efforts to mitigate negative impacts on native species and ecosystem functions. Removal programs that optimally allocate removal effort across space and time offer promise for improving invader suppression or eradication, especially given the limited resources available to these programs. However...
Authors
Jessica O. Diallo, Sarah J. Converse, Matthew Chmiel, Andy Stites, Julian D. Olden
Origin stories: How does learned migratory behaviour arise in populations? Origin stories: How does learned migratory behaviour arise in populations?
Although decades of research have deepened our understanding of the proximate triggers and ultimate drivers of migrations for a range of taxa, how populations establish migrations remains a mystery. However, recent studies have begun to illuminate the interplay between genetically inherited and learned migrations, opening the door to the evaluation of how migration may be learned...
Authors
Janey Fugate, Cody F. Wallace, Ellen O. Aikens, Brett Jesmer, Matthew Kauffman