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Earthquake recurrence estimates for northern Caribbean faults from combinatorial optimization

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Woods Hole Coastal and Marine Science Center

2023 Annual Report

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Pragmatically mapping Phragmites with unoccupied aerial systems: A comparison of invasive species land cover classification using RGB and multispectral imagery

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Hydroacoustic observations reveal drivers of mixing and salinization of a karst subterranean estuary during intense precipitation

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Pragmatically mapping Phragmites with unoccupied aerial systems: A comparison of invasive species land cover classification using RGB and multispectral imagery

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Woods Hole Coastal and Marine Science Center—2023 Annual Report.  The 2023 annual report highlights accomplishments, includes a list of publications, and summarizes the work of the center and each of the science groups.

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Filter Total Items: 1737

Earthquake magnitude distributions on northern Caribbean faults from combinatorial optimization models Earthquake magnitude distributions on northern Caribbean faults from combinatorial optimization models

On-fault earthquake magnitude distributions are calculated for northern Caribbean faults using estimates of fault slip and regional seismicity parameters. Integer programming, a combinatorial optimization method, is used to determine the optimal spatial arrangement of earthquakes sampled from a truncated Gutenberg-Richter distribution that minimizes the global misfit in slip rates on a...
Authors
Eric L. Geist, Uri S. ten Brink
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Elevated levels of radiocarbon in methane dissolved in seawater reveal likely local contamination from nuclear powered vessels Elevated levels of radiocarbon in methane dissolved in seawater reveal likely local contamination from nuclear powered vessels

Measurements of the natural radiocarbon content of methane (14C-CH4) dissolved in seawater and freshwater have been used to investigate sources and dynamics of methane. However, during investigations along the Atlantic, Pacific, and Arctic Ocean Margins of the United States, as well as in the North American Great Lakes, some samples revealed highly elevated 14C-CH4 values, as much as 4–5...
Authors
D.J. Joung, Carolyn D. Ruppel, J. Southon, John D. Kessler
By
Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

Woods Hole Coastal and Marine Science Center—2020 annual report Woods Hole Coastal and Marine Science Center—2020 annual report

The 2020 annual report of the U.S. Geological Survey Woods Hole Coastal and Marine Science Center highlights accomplishments of 2020, includes a list of 2020 publications, and summarizes the work of the center, as well as the work of each of its science groups. This product allows readers to gain a general understanding of the focus areas of the center’s scientific research and learn...
Authors
Sara Ernst
By
Woods Hole Coastal and Marine Science Center

Isolating detrital and diagenetic signals in magnetic susceptibility records from methane-bearing marine sediments Isolating detrital and diagenetic signals in magnetic susceptibility records from methane-bearing marine sediments

Volume-dependent magnetic susceptibility (κ) is commonly used for paleoenvironmental reconstructions in both terrestrial and marine sedimentary environments where it reflects a mixed signal between primary deposition and secondary diagenesis. In the marine environment, κ is strongly influenced by the abundance of ferrimagnetic minerals regulated by sediment transport processes. Post...
Authors
Joel P. L. Johnson, Stephen C. Phillips, William Clyde, Liviu Giosan, Marta E. Torres
By
Woods Hole Coastal and Marine Science Center

Labeling poststorm coastal imagery for machine learning: Measurement of interrater agreement Labeling poststorm coastal imagery for machine learning: Measurement of interrater agreement

Classifying images using supervised machine learning (ML) relies on labeled training data—classes or text descriptions, for example, associated with each image. Data-driven models are only as good as the data used for training, and this points to the importance of high-quality labeled data for developing a ML model that has predictive skill. Labeling data is typically a time-consuming...
Authors
Evan B. Goldstein, Daniel D. Buscombe, Eli D. Lazarus, Somya Mohanty, Shah N. Rafique, K A Anarde, Andrew D Ashton, Tomas Beuzen, Katherine A. Castagno, Nicholas Cohn, Matthew P. Conlin, Ashley Ellenson, Megan Gillen, Paige A. Hovenga, Jin-Si R. Over, Rose V. Palermo, Katherine Ratlif, Ian R Reeves, Lily H. Sanborn, Jessamin A. Straub, Luke A. Taylor, Elizabeth J. Wallace, Jonathan A. Warrick, Phillipe Alan Wernette, Hannah E Williams
By
Ecosystems Mission Area, Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Southwest Biological Science Center, Woods Hole Coastal and Marine Science Center, Supplemental Appropriations for Disaster Recovery Activities, Hurricane Florence, Hurricane Isaias, Hurricane Michael, Hurricanes

Hydrate formation on marine seep bubbles and the implications for water column methane dissolution Hydrate formation on marine seep bubbles and the implications for water column methane dissolution

Methane released from seafloor seeps contributes to a number of benthic, water column, and atmospheric processes. At seafloor seeps within the methane hydrate stability zone, crystalline gas hydrate shells can form on methane bubbles while the bubbles are still in contact with the seafloor or as the bubbles begin ascending through the water column. These shells reduce methane dissolution...
Authors
Xiaojing Fu, William F. Waite, Carolyn D. Ruppel
By
Woods Hole Coastal and Marine Science Center

Discrete sample introduction module for quantitative and isotopic analysis of methane and other gases by cavity ring-down spectroscopy Discrete sample introduction module for quantitative and isotopic analysis of methane and other gases by cavity ring-down spectroscopy

Carbon dioxide (CO2) and methane (CH4) are natural and anthropogenic products that play a central role in the global carbon cycle and regulating Earth’s climate. Applications utilizing laser absorption spectroscopy, which continuously measure concentrations and stable isotope ratios of these greenhouse gases, are routinely employed to measure the source and magnitude of atmospheric...
Authors
John Pohlman, Michael Casso, Cedric Magen, Emile M. Bergeron
By
Woods Hole Coastal and Marine Science Center

Modeling morphodynamics of coastal response to extreme events: What shape are we in? Modeling morphodynamics of coastal response to extreme events: What shape are we in?

This review focuses on recent advances in process-based numerical models of the impact of extreme storms on sandy coasts. Driven by larger-scale models of meteorology and hydrodynamics, these models simulate morphodynamics across the Sallenger storm-impact scale, including swash, collision, overwash, and inundation. Models are becoming both wider (as more processes are added) and deeper...
Authors
Christopher R. Sherwood, Ap van Dongeren, James Doyle, Christie Hegermiller, T. J. Hsu, Tarandeep S. Kalra, Maitane Olabarrieta, Allison Penko, Yashar Rafati, Dano Roelvink, Marlies van der Lugt, Jay Veeramony, John C. Warner
By
Woods Hole Coastal and Marine Science Center

Metabolic flexibility of aerobic methanotrophs under anoxic conditions in Arctic lake sediments Metabolic flexibility of aerobic methanotrophs under anoxic conditions in Arctic lake sediments

Methane (CH4) emissions from Arctic lakes are a large and growing source of greenhouse gas to the atmosphere with critical implications for global climate. Because Arctic lakes are ice covered for much of the year, understanding the metabolic flexibility of methanotrophs under anoxic conditions would aid in characterizing the mechanisms responsible for limiting CH4 emissions from high...
Authors
Ruoying He, Jing Wang, John Pohlman, Zhongjun Jia, Yi-Xuan Chu, Matthew Wooller, Mary Beth Leigh
By
Woods Hole Coastal and Marine Science Center

Processing coastal imagery with Agisoft Metashape Professional Edition, version 1.6—Structure from motion workflow documentation Processing coastal imagery with Agisoft Metashape Professional Edition, version 1.6—Structure from motion workflow documentation

Introduction Structure from motion (SFM) has become an integral technique in coastal change assessment; the U.S. Geological Survey (USGS) used Agisoft Metashape Professional Edition photogrammetry software to develop a workflow that processes coastline aerial imagery collected in response to storms since Hurricane Florence in 2018. This report details step-by-step instructions to create...
Authors
Jin-Si R. Over, Andrew C. Ritchie, Christine J. Kranenburg, Jenna A. Brown, Daniel D. Buscombe, Tom Noble, Christopher R. Sherwood, Jonathan A. Warrick, Phillipe A. Wernette
By
Ecosystems Mission Area, Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Maryland-Delaware-D.C. Water Science Center, Pacific Coastal and Marine Science Center, Southwest Biological Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Hurricane Florence, Hurricanes

Recent carbon storage and burial exceed historic rates in the San Juan Bay estuary peri-urban mangrove forests (Puerto Rico, United States) Recent carbon storage and burial exceed historic rates in the San Juan Bay estuary peri-urban mangrove forests (Puerto Rico, United States)

Mangroves sequester significant quantities of organic carbon (C) because of high rates of burial in the soil and storage in biomass. We estimated mangrove forest C storage and accumulation rates in aboveground and belowground components among five sites along an urbanization gradient in the San Juan Bay Estuary, Puerto Rico. Sites included the highly urbanized and clogged Caño Martin...
Authors
Cathleen Wigand, Meagan J. Eagle, Benjamin Branoff, Stephen Balogh, Kenneth Miller, Rose M. Martin, Alana Hanson, Autumn Oczkowski, Evelyn Huertas, Joseph Loffredo, Elizabeth Watson
By
Woods Hole Coastal and Marine Science Center

Oxygen-controlled recirculating seepage meter reveals extent of nitrogen transformation in discharging coastal groundwater at the aquifer–estuary interface Oxygen-controlled recirculating seepage meter reveals extent of nitrogen transformation in discharging coastal groundwater at the aquifer–estuary interface

Nutrient loads delivered to estuaries via submarine groundwater discharge (SGD) play an important role in the nitrogen (N) budget and eutrophication status. However, accurate and reliable quantification of the chemical flux across the final decimeters and centimeters at the sediment–estuary interface remains a challenge, because there is significant potential for biogeochemical...
Authors
Thomas W. Brooks, Kevin D. Kroeger, Holly A. Michael, Joanna K. York
By
Woods Hole Coastal and Marine Science Center
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