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Sound Waves Newsletter
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Filter Total Items: 1739
On the use of statistical analysis to understand submarine landslide processes and assess their hazard On the use of statistical analysis to understand submarine landslide processes and assess their hazard
Because of their inaccessibility, submarine landslides are typically studied individually and at great effort and expense to provide knowledge of the specific site conditions where these landslides occur. Statistical analysis of submarine landslide scars can offer generalized perspectives on the processes that initiate submarine landslides and can help toward hazard assessment in areas...
Authors
Uri S. ten Brink, Eric L. Geist
Limited mantle hydration by bending faults at the Middle America Trench Limited mantle hydration by bending faults at the Middle America Trench
Seismic anisotropy measurements show that upper mantle hydration at the Middle America Trench (MAT) is limited to serpentinization and/or water in fault zones, rather than distributed uniformly. Subduction of hydrated oceanic lithosphere recycles water back into the deep mantle, drives arc volcanism, and affects seismicity at subduction zones. Constraining the extent of upper mantle...
Authors
Nathaniel C. Miller, Danile Lizarralde, John A. Collins, Steven Holbrook, Harm van Avendonk
Soil organic carbon development and turnover in natural and disturbed salt marsh environments Soil organic carbon development and turnover in natural and disturbed salt marsh environments
Salt marsh survival with sea‐level rise (SLR) increasingly relies on soil organic carbon (SOC) accumulation and preservation. Using a novel combination of geochemical approaches, we characterized fine SOC (≤1 mm) supporting marsh elevation maintenance. Overlaying thermal reactivity, source (δ13C), and age (F14C) information demonstrates several processes contributing to soil development...
Authors
Sheron Luk, Katherine Todd-Brown, Meagan J. Eagle, Ann McNichol, Jonathan Sanderman, Kelsey Gosselin, Amanda C. Spivak
Ideas and perspectives: A strategic assessment of methane and nitrous oxide measurements in the marine environment Ideas and perspectives: A strategic assessment of methane and nitrous oxide measurements in the marine environment
>In the current era of rapid climate change, accurate characterization of climate-relevant gas dynamics – namely production, consumption, and net emissions – is required for all biomes, especially those ecosystems most susceptible to the impact of change. Marine environments include regions that act as net sources or sinks for numerous climate-active trace gases including methane (CH4)...
Authors
S.T. Wilson, A.N. Al-Haj, A. Bourbonnais, C. Frey, R.W. Fulweiler, John D. Kessler, H.K. Marchant, J Milucka, N.E. Ray, P Suntharalingham, B.F. Thornton, R.C. Upstill-Goddard, T.S. Weber, D.L. Arévalo-Martínez, H.W. Bange, H.M. Benway, D. Bianchi, A.V. Borges, B.X. Chang, P.M. Crill, D.A. del Valle, L. Farias, S.B. Joye, A. Kock, J Labidi, C.C. Manning, John Pohlman, G. Rehder, K.J. Sparrow, P.D. Tortell, T. Truede, D.L. Valentine, B.B. Ward, S. Yang, L.N. Yurganov
Evaluation of a roughness length parametrization accounting for wind–wave alignment in a coupled atmosphere–wave model Evaluation of a roughness length parametrization accounting for wind–wave alignment in a coupled atmosphere–wave model
The importance of wind energy as an alternative energy source has increased over the latest years with more focus on offshore winds. A good estimation of the offshore winds is thus of major importance for this industry. Up to now the effect of the wind–wave (mis)alignment has not yet been taken into account in coupled atmosphere–wave models to study the vertical wind profile and power...
Authors
Sara Porchetta, O. Temel, John C. Warner, J.C. Munoz-Esparza, J Monbaliu, J. van Beeck, N. van Lipzig
Sediment dynamics of a divergent bay–marsh complex Sediment dynamics of a divergent bay–marsh complex
Bay–marsh systems, composed of an embayment surrounded by fringing marsh incised by tidal channels, are widely distributed coastal environments. External sediment availability, marsh-edge erosion, and sea-level rise acting on such bay–marsh complexes may drive diverse sediment-flux regimes. These factors reinforce the ephemeral and dynamic nature of fringing marshes: material released by...
Authors
Daniel J. Nowacki, Neil K. Ganju
Along-margin variations in breakup volcanism at the Eastern North American Margin Along-margin variations in breakup volcanism at the Eastern North American Margin
We model the magnetic signature of rift-related volcanism to understand the distribution and volumeofmagmatic activity that occurred during the breakup of Pangaea and early Atlantic opening at the Eastern North American Margin (ENAM).Along-strike variations in the amplitude and character of the prominent East Coast Magnetic Anomaly (ECMA) suggest that the emplacement of the volcanic...
Authors
John A. Greene, Masako Tominaga, Nathaniel C. Miller
Using tracer variance decay to quantify variability of salinity mixing in the Hudson River Estuary Using tracer variance decay to quantify variability of salinity mixing in the Hudson River Estuary
The salinity structure in an estuary is controlled by time‐dependent mixing processes. However, the locations and temporal variability of where significant mixing occurs is not well‐understood. Here we utilize a tracer variance approach to demonstrate the spatial and temporal structure of salinity mixing in the Hudson River Estuary. We run a 4‐month hydrodynamic simulation of the tides...
Authors
John C. Warner, W Rockwill Geyer, David K. Ralston, Tarandeep S. Kalra
Probabilistic patterns of inundation and biogeomorphic changes due to sea-level rise along the northeastern U.S. Atlantic coast Probabilistic patterns of inundation and biogeomorphic changes due to sea-level rise along the northeastern U.S. Atlantic coast
Context Coastal landscapes evolve in response to sea-level rise (SLR) through a variety of geologic processes and ecological feedbacks. When the SLR rate surpasses the rate at which these processes build elevation and drive lateral migration, inundation is likely.Objectives To examine the role of land cover diversity and composition in landscape response to SLR across the northeastern...
Authors
Erika E. Lentz, Sara L. Zeigler, E. Robert Thieler, Nathaniel G. Plant
Ryder Glacier in northwest Greenland is shielded from warm Atlantic water by a bathymetric sill Ryder Glacier in northwest Greenland is shielded from warm Atlantic water by a bathymetric sill
The processes controlling advance and retreat of outlet glaciers in fjords draining the Greenland Ice Sheet remain poorly known, undermining assessments of their dynamics and associated sea-level rise in a warming climate. Mass loss of the Greenland Ice Sheet has increased six-fold over the last four decades, with discharge and melt from outlet glaciers comprising key components of this...
Authors
Martin Jakobsson, Larry Mayer, Johan Nilsson, Christian Stranne, Brian Calder, Matthew O’Regan, J. Farrell, Thomas M. Cronin, Volker Bruchert, Julek Chawarski, Bjorn Eriksson, Jonas Fredriksson, Laura Gemery, Anna Glueder, Felicity A. Holmes, Kevin Jerram, Nina Kirchner, Alan Mix, Julia Muchowski, Abhay Prakash, Brendan Reilly, Brett Thornton, Adam Ulfsbo, Elizabeteh Weidner, Henning Akesson, Tamara Handl, Emelie Stahl, Lee-Gray Boze, Sam Reed, Gabriel West, June Padman
Development of a submerged aquatic vegetation growth model in the Coupled Ocean–Atmosphere–Wave–Sediment Transport (COAWST v3.4) model Development of a submerged aquatic vegetation growth model in the Coupled Ocean–Atmosphere–Wave–Sediment Transport (COAWST v3.4) model
The coupled biophysical interactions between submerged aquatic vegetation (SAV), hydrodynamics (currents and waves), sediment dynamics, and nutrient cycling have long been of interest in estuarine environments. Recent observational studies have addressed feedbacks between SAV meadows and their role in modifying current velocity, sedimentation, and nutrient cycling. To represent these...
Authors
Tarandeep S. Kalra, Neil K. Ganju, Jeremy M. Testa
Meeting the challenge: U.S. Geological Survey North Atlantic and Appalachian Region fiscal year 2020 in review Meeting the challenge: U.S. Geological Survey North Atlantic and Appalachian Region fiscal year 2020 in review
The utilization, preservation, and conservation of the Nation’s resources requires well-informed management decisions. The North Atlantic and Appalachian Region (NAAR) of the U.S. Geological Survey (USGS) supports science-based decision making for Federal, State, and local policymakers to meet the challenges of today and into the future. The science centers in the NAAR have well-deserved
Authors
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Chesapeake Bay Activities, Florence Bascom Geoscience Center, Geology, Minerals, Energy, and Geophysics Science Center, Maryland-Delaware-D.C. Water Science Center, National Minerals Information Center, New England Water Science Center, New Jersey Water Science Center, New York Water Science Center, Ohio-Kentucky-Indiana Water Science Center, Pennsylvania Water Science Center, Virginia and West Virginia Water Science Center, Woods Hole Coastal and Marine Science Center, Office of Tribal Relations