Christopher Sherwood, PhD
Chris (he/him/his), is a coastal oceanographer with expertise in measuring and modeling sediment transport and coastal morphology changes.
Professional Experience
Research Oceanographer, U.S. Geological Survey, Menlo Park, CA and Woods Hole, MA, 1999 – present.
Affiliate Faculty, Ocean Engineering, University of New Hampshire, Durham, NH, 2009 – present
Guest Investigator, Applied Ocean Physics & Engineering, Woods Hole Oceanographic Institution, Woods Hole, MA, 2011 – present
Senior Research Scientist, Commonwealth Scientific and Industrial Research Organisation, Division of Marine Research, Hobart, Tasmania, Australia, 1996 - 1999
Education and Certifications
Ph.D. Geological Oceanography, University of Washington, Seattle, Washington 1995
M.S. Geological Oceanography, University of Washington, Seattle, Washington 1982
A.B., Economics and Environmental Studies, Bowdoin College, Brunswick, Maine, 1976
Science and Products
Directional bottom roughness associated with waves, currents, and ripples
Sediment transport and deposition on a river-dominated tidal flat: An idealized model study
Effect of roughness formulation on the performance of a coupled wave, hydrodynamic, and sediment transport model
Underwater microscope for measuring spatial and temporal changes in bed-sediment grain size
Underwater Microscope for Measuring Spatial and Temporal Changes in Bed-Sediment Grain Size
Report of the USGS Coastal and Marine Geology Modeling Workshop, Pacific Marine Science Center, Santa Cruz, CA, March 22-23, 2005
EuroSTRATAFORM--Po and Apennine Sediment Transport and Accumulation Experiment (PASTA)
Building a community sediment transport model
Sediment dynamics in the Adriatic Sea investigated with coupled models
Data files from the Grays Harbor Sediment Transport Experiment Spring 2001
Toward a community coastal sediment transport modeling system: the second workshop
Coastal evolution and sediment budget at the mouth of the Columbia River, USA
Science and Products
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Directional bottom roughness associated with waves, currents, and ripples
Roughness lengths are used in wave-current bottom boundary layer models to parameterize drag associated with grain roughness, the effect of saltating grains during sediment transport, and small-scale bottom topography (ripples and biogenic features). We made field measurements of flow parameters and recorded sonar images of ripples at the boundary of a sorted-bedform at ~12-m depth on the inner shAuthorsChristopher R. SherwoodSediment transport and deposition on a river-dominated tidal flat: An idealized model study
A 3-D hydrodynamic model is used to investigate how different size classes of river-derived sediment are transported, exported and trapped on an idealized, river-dominated tidal flat. The model is composed of a river channel flanked by sloping tidal flats, a configuration motivated by the intertidal region of the Skagit River mouth in Washington State, United States. It is forced by mixed tides anAuthorsChristopher R. Sherwood, Shih-Nan Chen, W. Rockwell Geyer, David K. RalstonEffect of roughness formulation on the performance of a coupled wave, hydrodynamic, and sediment transport model
A variety of algorithms are available for parameterizing the hydrodynamic bottom roughness associated with grain size, saltation, bedforms, and wave–current interaction in coastal ocean models. These parameterizations give rise to spatially and temporally variable bottom-drag coefficients that ostensibly provide better representations of physical processes than uniform and constant coefficients. HAuthorsNeil K. Ganju, Christopher R. SherwoodUnderwater microscope for measuring spatial and temporal changes in bed-sediment grain size
For more than a century, studies of sedimentology and sediment transport have measured bed-sediment grain size by collecting samples and transporting them back to the laboratory for grain-size analysis. This process is slow and expensive. Moreover, most sampling systems are not selective enough to sample only the surficial grains that interact with the flow; samples typically include sediment fromAuthorsDavid M. Rubin, Henry Chezar, Jodi N. Harney, David J. Topping, Theodore S. Melis, Christopher R. SherwoodUnderwater Microscope for Measuring Spatial and Temporal Changes in Bed-Sediment Grain Size
For more than a century, studies of sedimentology and sediment transport have measured bed-sediment grain size by collecting samples and transporting them back to the lab for grain-size analysis. This process is slow and expensive. Moreover, most sampling systems are not selective enough to sample only the surficial grains that interact with the flow; samples typically include sediment from at leaAuthorsDavid M. Rubin, Henry Chezar, Jodi N. Harney, David J. Topping, Theodore S. Melis, Christopher R. SherwoodReport of the USGS Coastal and Marine Geology Modeling Workshop, Pacific Marine Science Center, Santa Cruz, CA, March 22-23, 2005
A U.S. Geological Survey (USGS) Coastal and Marine Geology (CMG) Modeling Workshop was held to discuss the general topic of coastal modeling, defined broadly to include circulation, waves, sediment transport, water quality, ecology, sediment diagenesis, morphology change, and coastal evolution, on scales ranging from seconds and a few centimeters (individual ripples) to centuries (coastal evolutioAuthorsChristopher R. SherwoodEuroSTRATAFORM--Po and Apennine Sediment Transport and Accumulation Experiment (PASTA)
No abstract available.AuthorsChristopher R. Sherwood, Richard P. SignellBuilding a community sediment transport model
No abstract available.AuthorsChristopher R. Sherwood, Richard P. Signell, John C. WarnerSediment dynamics in the Adriatic Sea investigated with coupled models
Several large research programs focused on the Adriatic Sea in winter 2002-2003, making it an exciting place for sediment dynamics modelers (Figure 1). Investigations of atmospheric forcing and oceanic response (including wave generation and propagation, water-mass formation, stratification, and circulation), suspended material, bottom boundary layer dynamics, bottom sediment, and small-scale straAuthorsChristopher R. Sherwood, Jeffrey W. Book, Sandro Carniel, Luigi Cavaleri, Jacopo Chiggiato, Himangshu Das, James D. Doyle, Courtney K. Harris, Alan W. Niedoroda, Henry Perkins, Pierre-Marie Poulain, Julie Pullen, Christopher W. Reed, Aniello Russo, Mauro Sclavo, Richard P. Signell, Peter A. Traykovski, John C. WarnerData files from the Grays Harbor Sediment Transport Experiment Spring 2001
This publication consists of two DVD-ROMs, both of which are presented here. This report describes data collected during the Spring 2001 Grays Harbor Sediment Transport Experiment, and provides additional information needed to interpret the data. Two DVDs accompany this report; both contain documentation in html format that assist the user in navigating through the data. DVD-ROM-1 containsAuthorsLaura A. Landerman, Christopher R. Sherwood, Guy Gelfenbaum, Jessica Lacy, Peter Ruggiero, Douglas Wilson, Tom Chisholm, Keith KurrusToward a community coastal sediment transport modeling system: the second workshop
Models for transport and the long-term fate of particles in coastal waters are essential for a variety of applications related to commerce, defense, public health, and the quality of the marine environment. Examples include: analysis of waste disposal and transport and the fate of contaminated materials; evaluation of burial rates for naval mines or archaeological artifacts; prediction of water-coAuthorsChristopher R. Sherwood, Courtney K. Harris, W. Rockwell Geyer, Bradford ButmanCoastal evolution and sediment budget at the mouth of the Columbia River, USA
The coastal morphology of the Mouth of the Columbia River (MCR) has changed dramatically over the past century. Since the construction of jetties in 1914 and 1917, the inlet deepened and stabilized, the outer ebb delta migrated northward and offshore several kilometers, and the adjacent shorelines to the north and south prograded several hundreds of meters. Recently, high rates of erosion along thAuthorsGuy Gelfenbaum, Maarten C. Buijsman, Christopher R. Sherwood, Hans R. Moritz, Ann E. Gibbs - Science
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