Richard P Signell, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 90
Processes influencing the transport and fate of contaminated sediments in the coastal ocean– Boston Harbor and Massachusetts Bay Processes influencing the transport and fate of contaminated sediments in the coastal ocean– Boston Harbor and Massachusetts Bay
Most of the major urban centers of the United States including Boston, New York, Washington, Chicago, New Orleans, Miami, Los Angeles, San Francisco, and Seattle—are on a coast (fig. 1.1). All of these cities discharge treated sewage effluent into adjacent waters. In 2000, 74 percent of the U.S. population lived within 200 kilometers (km) of the coast. Between 1980 and 2002, the...
Authors
P. Soupy Alexander, Sandra M. Baldwin, Dann Blackwood, Jonathan Borden, Michael Casso, John Crusius, Joanne Goudreau, Linda Kalnejais, Paul Lamothe, William Martin, Marinna Martini, Richard Rendigs, Frederick Sayles, Richard Signell, Page Valentine, John C. Warner
Surficial geology in central Narragansett Bay, Rhode Island: interpretations of sidescan sonar and multibeam bathymetry Surficial geology in central Narragansett Bay, Rhode Island: interpretations of sidescan sonar and multibeam bathymetry
The United States Geological Survey (USGS) is working cooperatively with the National Oceanic and Atmospheric Association (NOAA) to interpret the surficial geology in estuaries along the coast of the northeastern United States. The purpose of our present study is to determine the distributions of surficial sediments and sedimentary environments in two areas of Narragansett Bay, Rhode...
Authors
Katherine McMullen, Larry Poppe, Richard Signell, Jane Denny, Jim Crocker, Andrew Beaver, P. Tod Schattgen
Role of sediment resuspension in the remobilization of particulate-phase metals from coastal sediments Role of sediment resuspension in the remobilization of particulate-phase metals from coastal sediments
The release of particulate-phase trace metals due to sediment resuspension has been investigated by combining erosion chamber experiments that apply a range of shear stresses typically encountered in coastal environments with a shear stress record simulated by a hydrodynamic model. Two sites with contrasting sediment chemistry were investigated. Sediment particles enriched in silver...
Authors
Linda Kalnejais, William Martin, Richard Signell, Michael H. Bothner
Bora event variability and the role of air-sea feedback Bora event variability and the role of air-sea feedback
A two-way interacting high resolution numerical simulation of the Adriatic Sea using the Navy Coastal Ocean Model (NCOM) and Coupled Ocean/ Atmosphere Mesoscale Prediction System (COAMPS??) was conducted to improve forecast momentum and heat flux fields, and to evaluate surface flux field differences for two consecutive bora events during February 2003. (COAMPS?? is a registered...
Authors
J. Pullen, J.D. Doyle, T. Haack, C. Dorman, R. Signell, C.M. Lee
February 2003 marine atmospheric conditions and the bora over the northern Adriatic February 2003 marine atmospheric conditions and the bora over the northern Adriatic
A winter oceanographic field experiment provided an opportunity to examine the atmospheric marine conditions over the northern Adriatic. Mean February winds are from a northeasterly direction over most of the Adriatic and a more northerly direction along the western coast. Wind speeds are fastest in jets over the NE coast during bora events and weakest in the mid-northwestern Adriatic...
Authors
C.E. Dorman, S. Carniel, L. Cavaleri, M. Sclavo, J. Chiggiato, J. Doyle, T. Haack, J. Pullen, B. Grbec, I. Vilibic, I. Janekovic, C. Lee, V. Malacic, M. Orlic, E. Paschini, A. Russo, R. Signell
Surface drifter derived circulation in the northern and middle Adriatic Sea: Response to wind regime and season Surface drifter derived circulation in the northern and middle Adriatic Sea: Response to wind regime and season
More than 120 satellite-tracked drifters were deployed in the northern and middle Adriatic (NMA) Sea between September 2002 and November 2003, with the purpose of studying the surface circulation at mesoscale to seasonal scale in relation to wind forcing, river runoff, and bottom topography. Pseudo-Eulerian and Lagrangian statistics were calculated from the low-pass-filtered drifter...
Authors
L. Ursella, P.-M. Poulain, R. Signell
Measurements of storm and nonstorm circulation in the northern Adriatic: October 2002 Through April 2003 Measurements of storm and nonstorm circulation in the northern Adriatic: October 2002 Through April 2003
Fifteen bottom-mounted Acoustic Doppler Current Profilers were deployed from October 2002 through April 2003 in the northern Adriatic Sea. Average transport from the portion of the Western Adriatic Current (WAC) along the Italian slope was 0.1470 ?? 0.0043 Sv, punctuated by bursts of more than twice that amount during storm events. Monthly means were calculated with times of strong wind...
Authors
J.W. Book, R. Signell, H. Perkins
Blooms of the toxic dinoflagellate Alexandrium fundyense in the western Gulf of Maine in 1993 and 1994: A comparative modeling study Blooms of the toxic dinoflagellate Alexandrium fundyense in the western Gulf of Maine in 1993 and 1994: A comparative modeling study
Blooms of the toxic dinoflagellate Alexandrium fundyense commonly occur in the western Gulf of Maine but the amount of toxin observed in coastal shellfish is highly variable. In this study, a coupled physical-biological model is used to investigate the dynamics underlying the observed A. fundyense abundance and shellfish toxicity in 1993 (a high toxicity year) and 1994 (low toxicity year...
Authors
C.A. Stock, D.J. McGillicuddy, D.M. Anderson, A.R. Solow, R. Signell
Processes influencing the transport and fate of contaminated sediments in the coastal ocean — Boston Harbor and Massachusetts Bay Processes influencing the transport and fate of contaminated sediments in the coastal ocean — Boston Harbor and Massachusetts Bay
No abstract available.
Authors
P. Soupy Alexander, Dann Blackwood, Jonathan Borden, Michael Casso, John Crusius, Joanne Goudreau, Linda Kalnejais, Paul Lamothe, William Martin, Marinna Martini, Sandra Milbert, Richard Rendigs, Frederick Sayles, Richard Signell, Page Valentine, John C. Warner
Building a community sediment transport model Building a community sediment transport model
No abstract available.
Authors
Christopher Sherwood, Richard Signell, John C. Warner
EuroSTRATAFORM--Po and Apennine Sediment Transport and Accumulation Experiment (PASTA) EuroSTRATAFORM--Po and Apennine Sediment Transport and Accumulation Experiment (PASTA)
No abstract available.
Authors
Christopher Sherwood, Richard Signell
Performance of four turbulence closure models implemented using a generic length scale method Performance of four turbulence closure models implemented using a generic length scale method
A two-equation turbulence model (one equation for turbulence kinetic energy and a second for a generic turbulence length-scale quantity) proposed by Umlauf and Burchard [J. Marine Research 61 (2003) 235] is implemented in a three-dimensional oceanographic model (Regional Oceanographic Modeling System; ROMS v2.0). These two equations, along with several stability functions, can represent...
Authors
J.C. Warner, C. Sherwood, H.G. Arango, R. Signell
Science and Products
Filter Total Items: 90
Processes influencing the transport and fate of contaminated sediments in the coastal ocean– Boston Harbor and Massachusetts Bay Processes influencing the transport and fate of contaminated sediments in the coastal ocean– Boston Harbor and Massachusetts Bay
Most of the major urban centers of the United States including Boston, New York, Washington, Chicago, New Orleans, Miami, Los Angeles, San Francisco, and Seattle—are on a coast (fig. 1.1). All of these cities discharge treated sewage effluent into adjacent waters. In 2000, 74 percent of the U.S. population lived within 200 kilometers (km) of the coast. Between 1980 and 2002, the...
Authors
P. Soupy Alexander, Sandra M. Baldwin, Dann Blackwood, Jonathan Borden, Michael Casso, John Crusius, Joanne Goudreau, Linda Kalnejais, Paul Lamothe, William Martin, Marinna Martini, Richard Rendigs, Frederick Sayles, Richard Signell, Page Valentine, John C. Warner
Surficial geology in central Narragansett Bay, Rhode Island: interpretations of sidescan sonar and multibeam bathymetry Surficial geology in central Narragansett Bay, Rhode Island: interpretations of sidescan sonar and multibeam bathymetry
The United States Geological Survey (USGS) is working cooperatively with the National Oceanic and Atmospheric Association (NOAA) to interpret the surficial geology in estuaries along the coast of the northeastern United States. The purpose of our present study is to determine the distributions of surficial sediments and sedimentary environments in two areas of Narragansett Bay, Rhode...
Authors
Katherine McMullen, Larry Poppe, Richard Signell, Jane Denny, Jim Crocker, Andrew Beaver, P. Tod Schattgen
Role of sediment resuspension in the remobilization of particulate-phase metals from coastal sediments Role of sediment resuspension in the remobilization of particulate-phase metals from coastal sediments
The release of particulate-phase trace metals due to sediment resuspension has been investigated by combining erosion chamber experiments that apply a range of shear stresses typically encountered in coastal environments with a shear stress record simulated by a hydrodynamic model. Two sites with contrasting sediment chemistry were investigated. Sediment particles enriched in silver...
Authors
Linda Kalnejais, William Martin, Richard Signell, Michael H. Bothner
Bora event variability and the role of air-sea feedback Bora event variability and the role of air-sea feedback
A two-way interacting high resolution numerical simulation of the Adriatic Sea using the Navy Coastal Ocean Model (NCOM) and Coupled Ocean/ Atmosphere Mesoscale Prediction System (COAMPS??) was conducted to improve forecast momentum and heat flux fields, and to evaluate surface flux field differences for two consecutive bora events during February 2003. (COAMPS?? is a registered...
Authors
J. Pullen, J.D. Doyle, T. Haack, C. Dorman, R. Signell, C.M. Lee
February 2003 marine atmospheric conditions and the bora over the northern Adriatic February 2003 marine atmospheric conditions and the bora over the northern Adriatic
A winter oceanographic field experiment provided an opportunity to examine the atmospheric marine conditions over the northern Adriatic. Mean February winds are from a northeasterly direction over most of the Adriatic and a more northerly direction along the western coast. Wind speeds are fastest in jets over the NE coast during bora events and weakest in the mid-northwestern Adriatic...
Authors
C.E. Dorman, S. Carniel, L. Cavaleri, M. Sclavo, J. Chiggiato, J. Doyle, T. Haack, J. Pullen, B. Grbec, I. Vilibic, I. Janekovic, C. Lee, V. Malacic, M. Orlic, E. Paschini, A. Russo, R. Signell
Surface drifter derived circulation in the northern and middle Adriatic Sea: Response to wind regime and season Surface drifter derived circulation in the northern and middle Adriatic Sea: Response to wind regime and season
More than 120 satellite-tracked drifters were deployed in the northern and middle Adriatic (NMA) Sea between September 2002 and November 2003, with the purpose of studying the surface circulation at mesoscale to seasonal scale in relation to wind forcing, river runoff, and bottom topography. Pseudo-Eulerian and Lagrangian statistics were calculated from the low-pass-filtered drifter...
Authors
L. Ursella, P.-M. Poulain, R. Signell
Measurements of storm and nonstorm circulation in the northern Adriatic: October 2002 Through April 2003 Measurements of storm and nonstorm circulation in the northern Adriatic: October 2002 Through April 2003
Fifteen bottom-mounted Acoustic Doppler Current Profilers were deployed from October 2002 through April 2003 in the northern Adriatic Sea. Average transport from the portion of the Western Adriatic Current (WAC) along the Italian slope was 0.1470 ?? 0.0043 Sv, punctuated by bursts of more than twice that amount during storm events. Monthly means were calculated with times of strong wind...
Authors
J.W. Book, R. Signell, H. Perkins
Blooms of the toxic dinoflagellate Alexandrium fundyense in the western Gulf of Maine in 1993 and 1994: A comparative modeling study Blooms of the toxic dinoflagellate Alexandrium fundyense in the western Gulf of Maine in 1993 and 1994: A comparative modeling study
Blooms of the toxic dinoflagellate Alexandrium fundyense commonly occur in the western Gulf of Maine but the amount of toxin observed in coastal shellfish is highly variable. In this study, a coupled physical-biological model is used to investigate the dynamics underlying the observed A. fundyense abundance and shellfish toxicity in 1993 (a high toxicity year) and 1994 (low toxicity year...
Authors
C.A. Stock, D.J. McGillicuddy, D.M. Anderson, A.R. Solow, R. Signell
Processes influencing the transport and fate of contaminated sediments in the coastal ocean — Boston Harbor and Massachusetts Bay Processes influencing the transport and fate of contaminated sediments in the coastal ocean — Boston Harbor and Massachusetts Bay
No abstract available.
Authors
P. Soupy Alexander, Dann Blackwood, Jonathan Borden, Michael Casso, John Crusius, Joanne Goudreau, Linda Kalnejais, Paul Lamothe, William Martin, Marinna Martini, Sandra Milbert, Richard Rendigs, Frederick Sayles, Richard Signell, Page Valentine, John C. Warner
Building a community sediment transport model Building a community sediment transport model
No abstract available.
Authors
Christopher Sherwood, Richard Signell, John C. Warner
EuroSTRATAFORM--Po and Apennine Sediment Transport and Accumulation Experiment (PASTA) EuroSTRATAFORM--Po and Apennine Sediment Transport and Accumulation Experiment (PASTA)
No abstract available.
Authors
Christopher Sherwood, Richard Signell
Performance of four turbulence closure models implemented using a generic length scale method Performance of four turbulence closure models implemented using a generic length scale method
A two-equation turbulence model (one equation for turbulence kinetic energy and a second for a generic turbulence length-scale quantity) proposed by Umlauf and Burchard [J. Marine Research 61 (2003) 235] is implemented in a three-dimensional oceanographic model (Regional Oceanographic Modeling System; ROMS v2.0). These two equations, along with several stability functions, can represent...
Authors
J.C. Warner, C. Sherwood, H.G. Arango, R. Signell