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The 50-year Landsat collection 2 archive
The Landsat global consolidated data archive now exceeds 50 years. In recognition of the need for consistently processed data across the Landsat satellite series, the U.S. Geological Survey (USGS) initiated collection-based processing of the entire archive that was processed as Collection 1 in 2016. In preparation for the data from the now successfully launched Landsat 9, the USGS reprocessed the
Authors
Christopher J. Crawford, David P. Roy, Saeed Arab, Christopher Barnes, Eric Vermote, Glynn Hulley, Aaron Gerace, Michael Choate, Christopher Engebretson, Esad Micijevic, Gail L. Schmidt, Cody Anderson, Martha Anderson, Michelle Bouchard, Bruce D. Cook, Ray Dittmeier, Danny Howard, Calli Jenkerson, Minsu Kim, Tania Kleyians, Tom Maiersperger, Chase Mueller, Christopher Neigh, Linda Owen, Benjamin Page, Nima Pahelvan, Rajagopalan Rengarajan, Jean-Claude Roger, Kristi Sayler, Pat L Scaramuzza, Sergii Skakun, Lin Yan, Hankui K. Zhang, Zhe Zhu, Stephen G. Zahn
Population dynamics of the threatened Oregon spotted frog before and after drought mitigation
Amphibians are among the most sensitive taxa to climate change, and species inhabiting arid and semiarid landscapes at the extremes of their range are especially vulnerable to drought. The Jack Creek, Oregon, USA, population of Oregon spotted frogs (Rana pretiosa) faces unique challenges because it occupies the highest elevation site in the species' extant range and one that has been transformed b
Authors
Jennifer Rowe, Christopher Pearl, Adam Duarte, Brome McCreary, Michael J. Adams
Crustal thickness and the VP/VS ratio within the Arabia Plate from P-wave receiver functions at 154 broadband seismic stations
As part of a joint Saudi Geological Survey (SGS) and United States Geological Survey project, we analyzed P-wave receiver functions from seismic stations covering most of the Kingdom of Saudi Arabia to map the thickness of the crust across the Arabia Plate. We present an update of crustal thickness estimates and fill in gaps for the western Arabian Shield and the rifted margin at the Red Sea (the
Authors
Alexander R. Blanchette, Simon L. Klemperer, Walter D. Mooney
Salinity trends in a groundwater system supplemented by 50 years of imported Colorado River water
The Indio subbasin of the Coachella Valley is a desert area of southern California where a growing population depends primarily on groundwater for drinking and agricultural uses. The aquifer system has been supplemented with Colorado River water through managed recharge and widespread irrigation since the mid-20th century. We use a combination of geochemical modeling and trend analysis to identify
Authors
Jennifer S. Harkness, Patrick Michael McCarthy, Bryant Jurgens, Zeno Levy
Relating absolute abundance of an estuarine fish to habitat area in an urbanizing environment
Organisms that rely on salt marsh habitat are an important trophic link, helping to maintain estuarine ecosystem productivity. We used GIS to quantify intertidal (assumed salt marsh) area from aerial photographs taken in 1939 and from software-supplied satellite imagery taken in 2021 for tidal creeks in North Carolina (USA) that have experienced minor (<20%), moderate (20-60%), or substantial (>60
Authors
Paul J. Rudershausen, Steven M. Lombardo, George R. Stilson, Matthew J. O'Donnell
Spatial distribution of elevation change monitoring in coastal wetlands across protected lands of the lower 48 United States
IntroductionTidally influenced coastal wetlands, both saline and fresh, appear where terrestrial and marine environments meet and are considered important ecosystems for identifying the impacts of climate change. Coastal wetlands provide valuable benefits to society and the environment in the form of flood protection, water-quality improvements, and shoreline erosion reduction, making them one of
Authors
Justine Annaliese Neville, Glenn R. Guntenspergen
Geology, hydrology, and groundwater contamination in the vicinity of Central Chemical facility, Hagerstown, Maryland
The soil and groundwater at the Central Chemical facility, Hagerstown, Maryland, are contaminated due to the blending and production of pesticides and fertilizers during much of the 20th century. Remedial investigations focus on two operable units (OU) consisting of the surface soils and waste disposal lagoon (OU-1) and the groundwater (OU-2). The contaminants of concern (COC) for groundwater incl
Authors
Trevor P. Needham, Alex R. Fiore, Scott W. Ator, Jeff P. Raffensperger, Madison B. Smith, Nicole M. Bellmyer, Caitlyn M. Dugan, Carol J. Morel
Critical stakeholder engagement: The road to actionable science Is paved with scientists’ sood intentions
To help stakeholders such as planners, resource managers, policymakers, and decision makers address environmental challenges in the Anthropocene, scientists are increasingly creating actionable science—science that is useful, usable, and used. Critical physical geography encourages the engagement of stakeholders in the creation of scientific knowledge to conduct actionable science and produce outp
Authors
Aparna Bamzai-Dodson, Amanda E. Cravens, Renee A. McPherson
Statewide sampling to determine spatial distribution, prevalence, and occurrence of per- and polyfluoroalkyl substances (PFAS) in Illinois community water supplies, 2020–21
Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic chemicals that have been manufactured and used globally since the 1940s. PFAS are used for their oil- and water-repellent properties, ability to reduce friction, and their flame-retardant nature. PFAS are widely used in a variety of products, including clothing, carpet, food packaging, and firefighting foam. The properties that ma
Authors
Amy M. Gahala, Jennifer B. Sharpe, Andrew M. Williams
Responses of juvenile mussels to metals in sediment and water of the Tri-State Mining District
The U.S. Geological Survey and collaborators from EcoAnalysts, Inc., completed field and laboratory studies during 2016–19 to evaluate the toxicity of metals to freshwater mussels in streams draining the Tri-State Mining District. This project consisted of (1) sampling and analysis of metals in water and sediment, (2) surveys of mussel assemblages at sites with suitable mussel habitat, (3) toxicit
Authors
John M. Besser, Chris D. Ivey, James L. Kunz, Nile E. Kemble, Danielle M. Cleveland, Jeffery A. Steevens, Heidi Dunn, Ryan Foley
lawilátɬa—Mount St. Helens—Land in transformation
This poster provides an overview of Mount St. Helens’ eruption history and emphasizes the continuous transformation of the volcanic landscape and its ecosystems. After each eruption, the landscape and ecosystems are not so much restored as they are morphed into new forms and patterns.
Authors
Carolyn L. Driedger, Alysa Adams, Michael A. Clynne, Kristi Cochrane, Abi Groskopf, Emma Johnson, Heather Monti, Elizabeth Westby
Implications of water, sediment, and nutrient budgets for the restoration of a shallow, turbid lake in semiarid southeastern Oregon
Malheur Lake is the largest lake in the endorheic Harney Basin in southeastern Oregon. Since the 1990s, Malheur Lake—which averages depths of about 1 meter—has been in a degraded, turbid state lacking submergent and emergent vegetation. The goals of this study were to identify the major sources of sediment and nutrients to Malheur Lake to determine the importance of managing nutrients for lake res
Authors
Cassandra D. Smith, Tamara M. Wood