Gas hydrates on Alaskan marine margins
Carolyn D. Ruppel, Patrick E. Hart
2022, Book chapter, World atlas of submarine gas hydrates in continental margins
Gas hydrate distributions on the marine margins of the U.S. state of Alaska are more poorly known than those on other U.S. margins, where bottom simulating reflections have been systematically mapped on marine seismic data to support modern, quantitative assessments of gas-in-place in gas hydrates. The extent of bottom simulating...
Interagency Flood Risk Management (InFRM) watershed hydrology assessment for the Neches River basin. Appendix D: RiverWare analyses
David S. Wallace
2022, Report
RiverWare is a river system modeling tool developed by CADSWES (Center of Advanced Decision Support for Water and Environmental Systems) that allows the user to simulate complex reservoir operations and perform period-of-record analyses for different scenarios. For the InFRM hydrology studies, RiverWare is used to generate a homogeneous regulated POR...
Relative bias in catch among long-term fish monitoring surveys within the San Francisco Estuary
Brock Huntsman, Brian Mahardja, Samuel M. Bashevkin
2022, San Francisco Estuary and Watershed Science (20)
Fish monitoring gears rarely capture all available fish, an inherent bias in monitoring programs referred to as catchability. Catchability is a source of bias that can be affected by numerous aspects of gear deployment (e.g., deployment speed, mesh size, and avoidance behavior). Thus, care must be taken when multiple surveys—especially...
San Francisco Estuary chlorophyll sensor and sample analysis intercomparison
Elizabeth B. Stumpner, Jamie S. Yin, Matthew Heberger, Jing Wu, Adam Wong, John Franco Saraceno
2022, Report
This report presents an assessment of chlorophyll collection methods and anonymous results of field and laboratory comparisons in 2018 - 2019 by agencies in the San Francisco Estuary (SFE). The methods assessment and comparison exercises, with funding provided by the Delta Regional Monitoring Program and Bay Nutrient Management Strategy and...
Workshops report for mesophotic and deep benthic community fish, mobile invertebrates, sessile invertebrates and infauna
Rachel Bassett, Stacey L. Harter, Randy Clark, Ian Zink, Katherine Hornick, Jennifer Hartman, Hanna Bliska, Melissa Carle, Tracey Sutton, Amanda Demopoulos, Andy David, Kristopher Benson, Jill Bourque, Martha S. Nizinski, Nancy G. Prouty, Stephanie M. Sharuga, Alicia Caporaso, Jennifer Le, Jennifer Herting, Cheryl L. Morrison, Matthew Poti
2022, DWH MDBC Summary Report SR-22-01
Two workshops with subject matter experts in the appropriate fields, were held in November and December 2021 to elicit guidance and feedback from the broader mesophotic and deep benthic scientific community. These workshops focused on best practices/approaches and identifying data gaps relative to habitat assessment and evaluation goals of the...
Analysis of ocean dynamics during the impact of Hurricane Matthew using ocean-atmosphere coupling
Liset Vazquez Proveyer, Maibys Sierra Lorenzo, Roberto Carlos Cruz Rodriguez, John C. Warner
2022, Cuban Journal of Meteorology (Revista Cubana de Meteorología) (28)
The main goal of this investigation is to improve the understanding of ocean-atmosphere coupling during hurricanes. The present work involves the integration of the ocean-atmosphere coupled components of the Coupled Ocean-Atmosphere-Wave-Sediment Transport Modeling System in the Very Short Term Prediction System (SisPI). Three experiments are performed: First, using a dynamic...
Extensive droughts in the conterminous United States during multiple centuries
Gregory J. McCabe, David M. Wolock
2022, Earth Interactions (26) 84-93
Extensive and severe droughts have substantial effects on water supplies, agriculture, and aquatic ecosystems. To better understand these droughts, we used tree-ring-based reconstructions of the Palmer drought severity index (PDSI) for the period 1475–2017 to examine droughts that covered at least 33% of the conterminous United States (CONUS). We identified...
Impact of spectral resolution on quantifying cyanobacteria in lakes and reservoirs: A machine-learning assessment
Kiana Zolfaghari, Nima Pahlevan, Caren Binding, Daniela Gurlin, Stefan G.H. Simis, Antonio Ruiz Verdu, Lin Li, Christopher J. Crawford, Andrea VanderWoude, Reagan Errera, Arthur Zastepa, Claude R. Duguay
2022, IEEE Transactions in Geoscience and Remote Sensing (60)
Cyanobacterial harmful algal blooms are an increasing threat to coastal and inland waters. These blooms can be detected using optical radiometers due to the presence of phycocyanin (PC) pigments. The spectral resolution of best-available multispectral sensors limits their ability to diagnostically detect PC in the presence of other photosynthetic pigments....
Demography and site fidelity of a grassland bird, the Henslow’s Sparrow, in powerline right-of-way habitat
Elizabeth Ann Hunter, Abigail Dwire, Todd M. Schneider
2022, Journal of Field Ornithology (93)
Grassland birds are among the fastest declining avian species in North America, primarily due to habitat loss. In the southeastern U.S., much grassland and open savanna habitat has been converted to timber production or agriculture, neither of which typically provides habitat for breeding or wintering grassland birds. Powerline right-of-ways could...
Satellite solar-induced chlorophyll fluorescence and near-infrared reflectance capture complementary aspects of dryland vegetation productivity dynamics
Xian Wang, Joel A. Biederman, John F. Knowles, Russell L. Scott, Alexander J Turner, Matthew P. Dannenberg, Philipp Kohler, Christian Frankenberg, Marcy E Litvak, Gerald N. Flerchinger, Beverly E. Law, Hyojung Kwon, Sasha C. Reed, William J Parton, Greg A. Barron-Gafford, William K. Smith
2022, Remote Sensing of the Environment (270)
Mounting evidence indicates dryland ecosystems play an important role in driving the interannual variability and trend of the terrestrial carbon sink. Nevertheless, our understanding of the seasonal dynamics of dryland ecosystem carbon uptake through photosynthesis [gross primary productivity (GPP)] remains relatively limited due in part to the limited availability of...
Nitrogen reductions have decreased hypoxia in the Chesapeake Bay: Evidence from empirical and numerical modeling
Luke T Frankel, Marjorie A. M. Friedrichs, Pierre St-Laurent, Aaron J. Bever, Romuald N. Lipcius, Gopal Bhatt, Gary W. Shenk
2022, Science of the Total Environment (814)
Seasonal hypoxia is a characteristic feature of the Chesapeake Bay due to anthropogenic nutrient input from agriculture and urbanization throughout the watershed. Although coordinated management efforts since 1985 have reduced nutrient inputs to the Bay, oxygen concentrations at depth in the summer still frequently...
Acute and lagged fitness consequences for a sagebrush obligate in a post mega-wildfire landscape
Christopher R. Anthony, Lee J. Foster, Christian A. Hagen, Katie M. Dugger
2022, Ecology and Evolution (12)
Species responses to disturbance influence their extinction risks. Greater sage- grouse (Centrocercus urophasianus) are bioindicators of sagebrush ecosystem health and the loss of sagebrush (Artemisia spp.) due to wildfire, can cause long-term declines in sage- grouse populations and...
Acquisition of Moon measurements by Earth orbiting sensors for lunar calibration
Thomas C. Stone
2022, IEEE Transactions on Geoscience and Remote Sensing (60)
The reflected light from the Moon can be utilized as a reference for radiometric calibration by employing a model to generate reference values corresponding to the Moon observations made by instruments. Using a calibration target that is outside the atmosphere provides a distinct advantage for...
Representing plant diversity in land models: An evolutionary approach to make ‘Functional Types’ more functional
Leander D.L. Anderegg, Daniel Mark Griffith, Jeannine Cavender-Bares, William J. Riley, Joseph A. Berry, Todd E. Dawson, Christopher J. Still
2022, Global Change Biology (28) 2541-2554
Plants are critical mediators of terrestrial mass and energy fluxes, and their structural and functional traits have profound impacts on local and global climate, biogeochemistry, biodiversity, and hydrology. Yet Earth System Models (ESMs), our most powerful tools for predicting the effects of humans on the coupled...
Relational database for horizontal‐to‐vertical spectral ratios
Pengfei Wang, Paolo Zimmaro, Tristan E Buckreis, Tatiana Gospe, Scott J Brandenberg, Sean Kamran Ahdi, Alan Yong, Jonathan P. Stewart
2022, Seismological Research Letters (93) 1075-1088
Frequency‐dependent horizontal‐to‐vertical spectral ratios (HVSRs) of Fourier amplitudes from three‐component recordings can provide useful information for site response modeling. However, such information is not incorporated into most ground‐motion models, including those from Next‐Generation Attenuation projects, which instead use the time‐averaged shear‐wave velocity (VS"><span...
Modeling the occurrence of M ∼ 5 caldera collapse-related earthquakes in Kīlauea volcano, Hawai'i
Andrea L. Llenos, Andrew J. Michael
2022, Geophysical Research Letters (49)
During the 2018 Kīlauea eruption and caldera collapse, M ∼ 5 caldera collapse earthquakes occurred almost daily from mid-May until the beginning of August. While caldera collapses happen infrequently, the collapse-related seismicity damaged nearby structures, and so these events should be included in a complete seismic hazard assessment. Here,...
A quantitative soil-geomorphic framework for developing and mapping ecological site groups
Travis W. Nauman, Samuel S Burch, Joel T. Humphries, Anna C. Knight, Michael C. Duniway
2022, Rangeland Ecology and Management (81) 9-33
Land management decisions need context about how landscapes will respond to different circumstances or actions. As ecologists’ understanding of nonlinear ecological dynamics has evolved into state-and-transition models (STMs), they have put more emphasis on defining and mapping the soil, geomorphological, and climate...
Demographic response of brown treesnakes to extended population suppression
Melia G. Nafus, Shane R. Siers, Brenna A. Levine, Zachary C. Quiogue, Amy A. Yackel Adams
2022, Journal of Wildlife Management (86)
From a management perspective, reptiles are relatively novel invasive taxa. Few methods for reptile control have been developed and very little is known about their effectiveness for reducing reptile populations, particularly when the goal is eradication. Many reptiles, and especially snakes, are cryptic, secretive, and undergo...
Reconstructing the paleoceanographic and redox conditions responsible for variations in uranium content in North American Devonian black shales
Michelle L. Abshire, Natascha Riedinger, John M. Clymer, Clint Scott, Silke Severmann, Stephen J. Romaniello, James O. Puckette
2022, Palaeogeography, Palaeoclimatology, Palaeoecology (587)
The uranium (U) content, and more recently, the ratio between 238U and 235U in black shales are commonly applied as a proxy to determine redox conditions and infer organic-richness. Uranium contents typically display a linear relationship with total organic carbon (TOC) in shales. This relationship is due to...
Mapped predictions of manganese and arsenic in an alluvial aquifer using boosted regression trees
Katherine J. Knierim, James A. Kingsbury, Kenneth Belitz, Paul E. Stackelberg, Burke J. Minsley, James R. Rigby
2022, Groundwater (60) 362-376
Manganese (Mn) concentrations and the probability of arsenic (As) exceeding the drinking-water standard of 10 μg/L were predicted in the Mississippi River Valley alluvial aquifer (MRVA) using boosted regression trees (BRT). BRT, a type of ensemble-tree machine-learning model, were created using predictor variables that affect Mn and...
Does where they start affect where they finish? A multimethod investigation of the role of stocking location on survival and dispersal of hatchery-reared Lake Sturgeon in Missouri River tributaries
M.J. Moore, Craig P. Paukert, T.W. Bonnot, B. Brooke, T. Moore
2022, River Research and Applications (38) 627-638
Despite ongoing Lake Sturgeon recovery efforts, little is known about the role of stocking location on survival and dispersal to nursery habitats. We stocked age-0 Lake Sturgeon at four sites in two adjacent Missouri River tributaries and used telemetry to examine whether survival and dispersal differed among stocking sites and...
Improving groundwater model calibration with repeat microgravity measurements
Jeffrey R. Kennedy, Libby M. Wildermuth, Jacob E. Knight, Joshua D. Larson
2022, Groundwater (60) 393-403
Groundwater-flow models depend on hydraulic head and flux observations for evaluation and calibration. A different type of observation—change in storage measured using repeat microgravity—can also be used for parameter estimation by simulating the expected change in gravity from a groundwater model and including the observation misfit...
2021 U.S. National Seismic Hazard Model for the State of Hawaii
Mark D. Petersen, Allison Shumway, Peter M. Powers, Morgan P. Moschetti, Andrea L. Llenos, Andrew J. Michael, Charles Mueller, Arthur D. Frankel, Sanaz Rezaeian, Kenneth S. Rukstales, Daniel E. McNamara, P. Okubo, Yuehua Zeng, Kishor S. Jaiswal, Sean Kamran Ahdi, Jason M. Altekruse, Brian Shiro
2022, Earthquake Spectra (38) 865-916
The 2021 U.S. National Seismic Hazard Model (NSHM) for the State of Hawaii updates the two-decades-old former model by incorporating new data and modeling techniques to improve the underlying ground shaking forecasts of tectonic-fault, tectonic-flexure, volcanic, and caldera collapse earthquakes. Two earthquake ground shaking hazard models (public policy and research)...
Automated detection of clipping in broadband earthquake records
James Kael Kleckner, Kyle Withers, Eric M. Thompson, J.M. Rekoske, Emily Wolin, Morgan P. Moschetti
2022, Seismological Research Letters (93) 880-896
Because the amount of available ground‐motion data has increased over the last decades, the need for automated processing algorithms has also increased. One difficulty with automated processing is to screen clipped records. Clipping occurs when the ground‐motion amplitude exceeds the dynamic range of the linear...
Exposure of cultural resources to 21st-century climate change: Towards a risk management plan
Jorie Clark, Jeremy S. Littell, Jay R. Alder, Nathan Teats
2022, Climate Risk Management (35)
Anthropogenic climate change during the 21st century presents a significant challenge to the protection of cultural resources (CRs) on federal lands that encompass ∼ 28% of the U.S. In particular, CRs on this...
