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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 more than 65,000 articles authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Projecting climate dependent coastal flood risk with a hybrid statistical dynamical model Projecting climate dependent coastal flood risk with a hybrid statistical dynamical model
Numerical models for tides, storm surge, and wave runup have demonstrated ability to accurately define spatially varying flood surfaces. However these models are typically too computationally expensive to dynamically simulate the full parameter space of future oceanographic, atmospheric, and hydrologic conditions that will constructively compound in the nearshore to cause both extreme...
Authors
D. L. Anderson, P. Ruggiero, F. J. Mendez, Patrick L. Barnard, Li H. Erikson, Andrea C. O'Neill, M. Merrifield, A. Rueda, L. Cagigal, J. M. Marra
Classifying crop types using two generations of hyperspectral sensors (Hyperion and DESIS) with machine learning on the cloud Classifying crop types using two generations of hyperspectral sensors (Hyperion and DESIS) with machine learning on the cloud
Advances in spaceborne hyperspectral (HS) remote sensing, cloud-computing, and machine learning can help measure, model, map and monitor agricultural crops to address global food and water security issues, such as by providing accurate estimates of crop area and yield to model agricultural productivity. Leveraging these advances, we used the Earth Observing-1 (EO-1) Hyperion historical...
Authors
Itiya P. Aneece, Prasad Thenkabail
The triple argon isotope composition of groundwater on ten-thousand-year timescales The triple argon isotope composition of groundwater on ten-thousand-year timescales
Understanding the age and movement of groundwater is important for predicting the vulnerability of wells to contamination, constraining flow models that inform sustainable groundwater management, and interpreting geochemical signals that reflect past climate. Due to both the ubiquity of groundwater with order ten-thousand-year residence times and its importance for climate reconstruction...
Authors
Alan Seltzer, John A. Krantz, Jessica Ng, Wesley R. Danskin, David Bekaert, Peter H. Barry, David L. Kimbrough, Justin T. Kulongoski, Jeffrey P. Severinghaus
A graphical causal model for resolving species identity effects and biodiversity–ecosystem function correlations: Reply A graphical causal model for resolving species identity effects and biodiversity–ecosystem function correlations: Reply
No abstract available.
Authors
Donald Schoolmaster, Chad R Zirbel, James P. Cronin
Correspondence analysis for mineral commodity research: An example workflow for mineralized calderas, southwest United States Correspondence analysis for mineral commodity research: An example workflow for mineralized calderas, southwest United States
Historical mine and mineral deposit datasets are routinely used to inform quantitative mineral assessment models, but they also can contain a wealth of supplementary qualitative information that is generally underutilized. We present a workflow that uses correspondence analysis, an exploratory tool commonly applied to multivariate abundance data, to better utilize qualitative data in...
Authors
Joshua Mark Rosera, Drew S Coleman
Clutch may predict growth of hatchling Burmese pythons better than food availability or sex Clutch may predict growth of hatchling Burmese pythons better than food availability or sex
Identifying which environmental and genetic factors affect growth pattern phenotypes can help biologists predict how organisms distribute finite energy resources in response to varying environmental conditions and physiological states. This information may be useful for monitoring and managing populations of cryptic, endangered, and invasive species. Consequently, we assessed the effects...
Authors
Jillian Maureen Josimovich, Bryan G. Falk, Alejandro Grajal-Puche, Emma B. Hanslowe, Ian A. Bartoszek, Robert Reed, Andrea Faye Currylow
Identifying factors that affect mountain lake sensitivity to atmospheric nitrogen deposition across multiple scales Identifying factors that affect mountain lake sensitivity to atmospheric nitrogen deposition across multiple scales
Increased nitrogen (N) deposition rates over the past century have affected both North American and European mountain lake ecosystems. Ecological sensitivity of mountain lakes to N deposition varies, however, because chemical and biological responses are modulated by local watershed and lake properties. We evaluated predictors of mountain lake sensitivity to atmospheric N deposition...
Authors
Benjamin Burpee, Jasmine Saros, Leora Nanus, Jill S. Baron, Janice Brahney, Kyle Christianson, Taylor Gantz, Andi Heard, Beth Hundey, Karin Koinig, Jiri Kopacek, Katrina Moser, Koren Nydick, Isabella A. Oleksy, Steven Sadro, Ruben Sommaruga, Rolf Vinebrooke, Jason Williams
Downhill from Austin and Ely to Las Vegas: U-Pb detrital zircon suites from the Eocene–Oligocene Titus Canyon Formation and associated strata, Death Valley, California Downhill from Austin and Ely to Las Vegas: U-Pb detrital zircon suites from the Eocene–Oligocene Titus Canyon Formation and associated strata, Death Valley, California
In a reconnaissance investigation aimed at interrogating the changing topography and paleogeography of the western United States prior to Basin and Range faulting, a preliminary study made use of U-Pb ages of detrital zircon suites from 16 samples from the Eocene–Oligocene Titus Canyon Formation, its overlying units, and correlatives near Death Valley. The Titus Canyon Formation...
Authors
Elizabeth L. Miller, Mark Raftrey, Jens-Erik Lundstern
Predicting coastal impacts by wave farms: A comparison of wave-averaged and wave-resolving models Predicting coastal impacts by wave farms: A comparison of wave-averaged and wave-resolving models
Wave energy converters (WECs) will have to be arranged into arrays of many devices to extract commercially viable amounts of energy. To understand the potential coastal impacts of WEC arrays, most research to date has relied on wave-averaged models given their computational efficiency. However, it is unknown how accurate wave-averaged model predictions are given a lack of validation data...
Authors
Daniel R. David, Dirk P. Rijnsdorp, Jeff E. Hansen, Ryan J. Lowe, Mark L. Buckley
Tallgrass prairie wildlife exposure to spray drift from commonly used soybean insecticides in Midwestern USA Tallgrass prairie wildlife exposure to spray drift from commonly used soybean insecticides in Midwestern USA
Insecticides are widely used in the Midwestern USA to combat soybean aphids (Aphis glycines), a globally important crop pest. Broad-spectrum foliar insecticides such as chlorpyrifos, lambda-cyhalothrin, and bifenthrin (hereafter, “target insecticides”) are toxic to wildlife in laboratory settings; however, little information exists regarding drift and deposition of these insecticides in...
Authors
Katelin M. Goebel, Nicole M. Davros, David E. Andersen, Pamela J. Rice
Combining fixed-location count data and movement data to estimate abundance of a lake sturgeon spawning run Combining fixed-location count data and movement data to estimate abundance of a lake sturgeon spawning run
Estimating abundance of migrating fishes is challenging. While sonars can be deployed continuously, improper assumptions about unidirectional migration and complete spatial coverage can lead to inaccurate estimates. To address these challenges, we present a framework for combining fixed-location count data from a dual-frequency identification sonar (DIDSON) with movement data from...
Authors
Lisa K. Izzo, Gayle Barbin Zydlewski, Donna L. Parrish
The U.S. Inland Creel and Angler Survey Catalog (CreelCat): Development, applications, and opportunities The U.S. Inland Creel and Angler Survey Catalog (CreelCat): Development, applications, and opportunities
Inland recreational fishing, defined as primarily leisure-driven fishing in freshwaters, is a popular pastime in the USA. State natural resource agencies endeavor to provide high-quality and sustainable fishing opportunities for anglers. Managers often use creel and other angler survey data to inform state- and waterbody-level management efforts. Despite the broad implementation of...
Authors
Abigail J. Lynch, Nick Sievert, Holly Susan Embke, Ashley Robertson, Bonnie Jean Evaline Myers, M. S. Allen, Zach S. Feiner, Fritz Hoogakker, Scott Knoche, Rebecca Krogman, Stephen R. Midway, Chelsey L. Nieman, Craig Paukert, Kevin L. Pope, Mark W. Rogers, L. S. Wszola, Beard