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January 27, 2026

ECCOE Landsat Quarterly Calibration and Validation Report—Quarter 2, 2025 ECCOE Landsat Quarterly Calibration and Validation Report—Quarter 2, 2025

Executive Summary The U.S. Geological Survey Earth Resources Observation and Science Calibration and Validation (Cal/Val) Center of Excellence (ECCOE) focuses on improving the accuracy, precision, calibration, and product quality of remote- sensing data, leveraging years of multiscale optical system geometric and radiometric calibration and characterization experience. The ECCOE Landsat...

Authors

Md Obaidul Haque, Nahid Hasan, Ashish Shrestha, Rajagopalan Rengarajan, Mark Lubke, Daniel Steinwand, Paul Bresnahan, Jerad L. Shaw, Kathryn Ruslander, Esad Micijevic, Michael J. Choate, Cody Anderson, Jeff Clauson, Kurt Thome, Amit Angal, Raviv Levy, Jeff Miller, Leibo Ding, Cibele Teixeira Pinto

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January 23, 2026

Assessing the influence of conservation implementation on water quality during surface runoff events at edge-of-field monitoring sites located in the Laurentian Great Lakes basin Assessing the influence of conservation implementation on water quality during surface runoff events at edge-of-field monitoring sites located in the Laurentian Great Lakes basin

The Laurentian Great Lakes are a vital freshwater resource in the United States, and nonpoint source (NPS) nutrient pollution, specifically phosphorus (P) and nitrogen (N), from agricultural land use continues to negatively impact water quality throughout the Great Lakes basin. One focus of the Great Lakes Restoration Initiative (GLRI), a mechanism to coordinate conservation efforts in...

Authors

Brittany Rose Hanrahan, Matthew W. Diebel, Rebecca B. Carvin, Edward G. Dobrowolski, Matthew John Hardebeck, Andrew Jason Kowalczk, Chad A. Toussant, Matthew J. Komiskey

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January 22, 2026

Miocene evolution of the Humboldt Current Miocene evolution of the Humboldt Current

Diatom records from the East Pisco Basin (EPB) of southern Peru and offshore Ocean Drilling Program (ODP) Hole 682 A reveal stepwise increases in the primary productivity of the Humboldt Current during the middle and late Miocene. Although diatoms are present back through the late middle Eocene, successively enhanced diatom production occurs during the Miocene in four steps. The first...

Authors

John A. Barron, Thomas J. DeVries, Jason J. Coenen

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January 22, 2026

Compilation of a nationwide river image dataset for identifying river channels and river rapids via deep learning Compilation of a nationwide river image dataset for identifying river channels and river rapids via deep learning

Remote sensing enables large-scale, image-based assessments of river dynamics, offering new opportunities for hydrological monitoring. We present a publicly available dataset consisting of 281,024 satellite and aerial images of U.S. rivers, constructed using an Application Programming Interface (API) and the U.S. Geological Survey’s National Hydrography Dataset. The dataset includes...

Authors

Nicholas Brimhall, Kelvyn K. Bladen, Tom Kerby, Carl J. Legleiter, Cameron Swapp, Hannah Fluckiger, Julie E Bahr, Makenna Roberts, Kaden Hart, Christina L. Stegman, Brennan Bean, Kevin Moon

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January 21, 2026

An energetic tradeoff best explains parturition timing in grizzly bears An energetic tradeoff best explains parturition timing in grizzly bears

Timing of grizzly bear (Ursus arctos) parturition during hibernation has been explained by ancestral traits (delayed implantation, altricial young, obligate maternal denning), but the ultimate driver underlying precise timing has not been fully explored. Capitalizing on an observed latitudinal increase in denning duration among four populations in interior North America, we tested two...

Authors

C. M. Costello, L. L. Roberts, D. D. Bjornlie, M. D. Cameron, J. G. Clapp, Mark Haroldson, G. V. Hilderbrand, K. Joly, W. Kasworm, J. M. Nicholson, T. Radandt, M. S. Sorum, J. E. Teisberg, Frank T. van Manen, M. A. Vinks

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January 21, 2026

Distribution, abundance, breeding activities, and habitat use of the Least Bell’s Vireo at Marine Corps Base Camp Pendleton, California—2020–24 summary report Distribution, abundance, breeding activities, and habitat use of the Least Bell’s Vireo at Marine Corps Base Camp Pendleton, California—2020–24 summary report

Executive Summary The purpose of this report is to provide the Marine Corps with a summary of abundance, breeding activity, demography, and habitat use of endangered Least Bell’s Vireos (Vireo bellii pusillus) at Marine Corps Base Camp Pendleton, California (MCBCP or Base). The report presents results of vireo surveys and monitoring in 2024 and summarizes a subset of data collected from...

Authors

Suellen Lynn, Alexandra Houston, Barbara E. Kus, Shannon M. Mendia

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