Synoptic sections of the Denmark Strait Overflow
We report on a rapid high-resolution survey of the Denmark Strait overflow (DSO) as it crosses the sill, the first such program to incorporate full-water-column velocity profiles in addition to conventional hydrographic measurements. Seven transects with expendable profilers over the course of one w...
Published in: | Geophysical Research Letters |
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Language: | English |
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AGU (American Geophysical Union)
2001
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Online Access: | https://oceanrep.geomar.de/id/eprint/1949/ https://oceanrep.geomar.de/id/eprint/1949/1/Girton01_grl.pdf https://doi.org/10.1029/2000GL011970 |
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ftoceanrep:oai:oceanrep.geomar.de:1949 2023-05-15T15:04:31+02:00 Synoptic sections of the Denmark Strait Overflow Girton, J. B. Sanford, T. B. Käse, Rolf H. 2001 text https://oceanrep.geomar.de/id/eprint/1949/ https://oceanrep.geomar.de/id/eprint/1949/1/Girton01_grl.pdf https://doi.org/10.1029/2000GL011970 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/1949/1/Girton01_grl.pdf Girton, J. B., Sanford, T. B. and Käse, R. H. (2001) Synoptic sections of the Denmark Strait Overflow. Open Access Geophysical Research Letters, 28 (8). pp. 1619-1622. DOI 10.1029/2000GL011970 <https://doi.org/10.1029/2000GL011970>. doi:10.1029/2000GL011970 info:eu-repo/semantics/openAccess Article PeerReviewed 2001 ftoceanrep https://doi.org/10.1029/2000GL011970 2023-04-07T14:44:51Z We report on a rapid high-resolution survey of the Denmark Strait overflow (DSO) as it crosses the sill, the first such program to incorporate full-water-column velocity profiles in addition to conventional hydrographic measurements. Seven transects with expendable profilers over the course of one week are used to estimate volume transport as a function of density. Our observations reveal the presence of a strongly barotropic flow associated with the nearly-vertical front dividing the Arctic and Atlantic waters. The seven-section mean transport of water denser than σθ=27.8 is 2.7±0.6Sv, while the mean transport of water colder than 2.0°C is 3.8±0.8 Sv. Although this is larger than the 2.9 Sv of θ < 2°C water measured by a 1973 current meter array, we find that a sampling of our sections equivalent to the extent of that array also measures 2.9Sv of cold water. Both the structure and magnitude of the measured flow are reproduced well by a high-resolution numerical model of buoyancy-driven exchange with realistic topography. Article in Journal/Newspaper Arctic Denmark Strait OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Geophysical Research Letters 28 8 1619 1622 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
We report on a rapid high-resolution survey of the Denmark Strait overflow (DSO) as it crosses the sill, the first such program to incorporate full-water-column velocity profiles in addition to conventional hydrographic measurements. Seven transects with expendable profilers over the course of one week are used to estimate volume transport as a function of density. Our observations reveal the presence of a strongly barotropic flow associated with the nearly-vertical front dividing the Arctic and Atlantic waters. The seven-section mean transport of water denser than σθ=27.8 is 2.7±0.6Sv, while the mean transport of water colder than 2.0°C is 3.8±0.8 Sv. Although this is larger than the 2.9 Sv of θ < 2°C water measured by a 1973 current meter array, we find that a sampling of our sections equivalent to the extent of that array also measures 2.9Sv of cold water. Both the structure and magnitude of the measured flow are reproduced well by a high-resolution numerical model of buoyancy-driven exchange with realistic topography. |
format |
Article in Journal/Newspaper |
author |
Girton, J. B. Sanford, T. B. Käse, Rolf H. |
spellingShingle |
Girton, J. B. Sanford, T. B. Käse, Rolf H. Synoptic sections of the Denmark Strait Overflow |
author_facet |
Girton, J. B. Sanford, T. B. Käse, Rolf H. |
author_sort |
Girton, J. B. |
title |
Synoptic sections of the Denmark Strait Overflow |
title_short |
Synoptic sections of the Denmark Strait Overflow |
title_full |
Synoptic sections of the Denmark Strait Overflow |
title_fullStr |
Synoptic sections of the Denmark Strait Overflow |
title_full_unstemmed |
Synoptic sections of the Denmark Strait Overflow |
title_sort |
synoptic sections of the denmark strait overflow |
publisher |
AGU (American Geophysical Union) |
publishDate |
2001 |
url |
https://oceanrep.geomar.de/id/eprint/1949/ https://oceanrep.geomar.de/id/eprint/1949/1/Girton01_grl.pdf https://doi.org/10.1029/2000GL011970 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Denmark Strait |
genre_facet |
Arctic Denmark Strait |
op_relation |
https://oceanrep.geomar.de/id/eprint/1949/1/Girton01_grl.pdf Girton, J. B., Sanford, T. B. and Käse, R. H. (2001) Synoptic sections of the Denmark Strait Overflow. Open Access Geophysical Research Letters, 28 (8). pp. 1619-1622. DOI 10.1029/2000GL011970 <https://doi.org/10.1029/2000GL011970>. doi:10.1029/2000GL011970 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2000GL011970 |
container_title |
Geophysical Research Letters |
container_volume |
28 |
container_issue |
8 |
container_start_page |
1619 |
op_container_end_page |
1622 |
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1766336279894556672 |