Nonlinear Gulf Stream Interaction with the Deep Western Boundary Current System: Observations and a Numerical Simulation
Gulf Stream (GS) separation near its observed Cape Hatteras (CH) separation location, and its ensuing path and dynamics, is a challenging ocean modeling problem. If a model GS separates much farther north than CH, then northward GS meanders, which pinch off warm core eddies (rings), are not possible...
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ftnavalpschool:oai:calhoun.nps.edu:10945/60149 2024-06-09T07:44:17+00:00 Nonlinear Gulf Stream Interaction with the Deep Western Boundary Current System: Observations and a Numerical Simulation Dietrich, David E. Mehra, Avichal Haney, Robert L. Bowman, Malcolm J. Tseng, Yu-Heng Ames Research Center 2003-01 application/pdf https://hdl.handle.net/10945/60149 https://ntrs.nasa.gov/search.jsp?R=20040031476 unknown Center for Turbulence Research Annual Research Briefs 2003; p. 101-114 20040031476 https://hdl.handle.net/10945/60149 https://ntrs.nasa.gov/search.jsp?R=20040031476 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. GULF STREAM UPSTREAM HEAT TRANSFER BOUNDARIES THERMOHALINE CIRCULATION OCEANS DIVERGENCE CONVERGENCE Technical Report 2003 ftnavalpschool 2024-05-15T00:51:48Z Gulf Stream (GS) separation near its observed Cape Hatteras (CH) separation location, and its ensuing path and dynamics, is a challenging ocean modeling problem. If a model GS separates much farther north than CH, then northward GS meanders, which pinch off warm core eddies (rings), are not possible or are strongly constrained by the Grand Banks shelfbreak. Cold core rings pinch off the southward GS meanders. The rings are often re-absorbed by the GS. The important warm core rings enhance heat exchange and, especially, affect the northern GS branch after GS bifurcation near the New England Seamount Chain. This northern branch gains heat by contact with the southern branch water upstream of bifurcation, and warms the Arctic Ocean and northern seas, thus playing a major role in ice dynamics, thermohaline circulation and possible global climate warming. These rings transport heat northward between the separated GS and shelf slope/Deep Western Boundary Current system (DWBC). This region has nearly level time mean isopycnals. The eddy heat transport convergence/divergence enhances the shelfbreak and GS front intensities and thus also increases watermass transformation. The fronts are maintained by warm advection by the Florida Current and cool advection by the DWBC. Thus, the GS interaction with the DWBC through the intermediate eddy field is climatologically important. Approved for public release; distribution is unlimited. NCC2-1371 Report Arctic Arctic Ocean Naval Postgraduate School: Calhoun Arctic Arctic Ocean |
institution |
Open Polar |
collection |
Naval Postgraduate School: Calhoun |
op_collection_id |
ftnavalpschool |
language |
unknown |
topic |
GULF STREAM UPSTREAM HEAT TRANSFER BOUNDARIES THERMOHALINE CIRCULATION OCEANS DIVERGENCE CONVERGENCE |
spellingShingle |
GULF STREAM UPSTREAM HEAT TRANSFER BOUNDARIES THERMOHALINE CIRCULATION OCEANS DIVERGENCE CONVERGENCE Dietrich, David E. Mehra, Avichal Haney, Robert L. Bowman, Malcolm J. Tseng, Yu-Heng Nonlinear Gulf Stream Interaction with the Deep Western Boundary Current System: Observations and a Numerical Simulation |
topic_facet |
GULF STREAM UPSTREAM HEAT TRANSFER BOUNDARIES THERMOHALINE CIRCULATION OCEANS DIVERGENCE CONVERGENCE |
description |
Gulf Stream (GS) separation near its observed Cape Hatteras (CH) separation location, and its ensuing path and dynamics, is a challenging ocean modeling problem. If a model GS separates much farther north than CH, then northward GS meanders, which pinch off warm core eddies (rings), are not possible or are strongly constrained by the Grand Banks shelfbreak. Cold core rings pinch off the southward GS meanders. The rings are often re-absorbed by the GS. The important warm core rings enhance heat exchange and, especially, affect the northern GS branch after GS bifurcation near the New England Seamount Chain. This northern branch gains heat by contact with the southern branch water upstream of bifurcation, and warms the Arctic Ocean and northern seas, thus playing a major role in ice dynamics, thermohaline circulation and possible global climate warming. These rings transport heat northward between the separated GS and shelf slope/Deep Western Boundary Current system (DWBC). This region has nearly level time mean isopycnals. The eddy heat transport convergence/divergence enhances the shelfbreak and GS front intensities and thus also increases watermass transformation. The fronts are maintained by warm advection by the Florida Current and cool advection by the DWBC. Thus, the GS interaction with the DWBC through the intermediate eddy field is climatologically important. Approved for public release; distribution is unlimited. NCC2-1371 |
author2 |
Ames Research Center |
format |
Report |
author |
Dietrich, David E. Mehra, Avichal Haney, Robert L. Bowman, Malcolm J. Tseng, Yu-Heng |
author_facet |
Dietrich, David E. Mehra, Avichal Haney, Robert L. Bowman, Malcolm J. Tseng, Yu-Heng |
author_sort |
Dietrich, David E. |
title |
Nonlinear Gulf Stream Interaction with the Deep Western Boundary Current System: Observations and a Numerical Simulation |
title_short |
Nonlinear Gulf Stream Interaction with the Deep Western Boundary Current System: Observations and a Numerical Simulation |
title_full |
Nonlinear Gulf Stream Interaction with the Deep Western Boundary Current System: Observations and a Numerical Simulation |
title_fullStr |
Nonlinear Gulf Stream Interaction with the Deep Western Boundary Current System: Observations and a Numerical Simulation |
title_full_unstemmed |
Nonlinear Gulf Stream Interaction with the Deep Western Boundary Current System: Observations and a Numerical Simulation |
title_sort |
nonlinear gulf stream interaction with the deep western boundary current system: observations and a numerical simulation |
publishDate |
2003 |
url |
https://hdl.handle.net/10945/60149 https://ntrs.nasa.gov/search.jsp?R=20040031476 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_relation |
Center for Turbulence Research Annual Research Briefs 2003; p. 101-114 20040031476 https://hdl.handle.net/10945/60149 https://ntrs.nasa.gov/search.jsp?R=20040031476 |
op_rights |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. |
_version_ |
1801373052402925568 |