Strong bottom currents and cyclogenesis in Drake Passage
Observations from 38 bottom-moored Current and. Pressure Recording Inverted Echo Sounders (CPIES) deployed in Drake Passage during the 2007-2008 International Polar Year provide unprecedented coverage of near-bottom currents and pressures spanning the entire Antarctic Circumpolar Current. Year-long-...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-2196 2023-12-03T10:13:10+01:00 Strong bottom currents and cyclogenesis in Drake Passage Chereskin, T. K. Donohue, K. A. Watts, D. R. Tracey, K. L. Firing, Y. L. Cutting, A. L. 2009-12-01T08:00:00Z https://digitalcommons.uri.edu/gsofacpubs/1221 https://doi.org/10.1029/2009GL040940 unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/1221 doi:10.1029/2009GL040940 https://doi.org/10.1029/2009GL040940 Graduate School of Oceanography Faculty Publications text 2009 ftunivrhodeislan https://doi.org/10.1029/2009GL040940 2023-11-06T19:09:56Z Observations from 38 bottom-moored Current and. Pressure Recording Inverted Echo Sounders (CPIES) deployed in Drake Passage during the 2007-2008 International Polar Year provide unprecedented coverage of near-bottom currents and pressures spanning the entire Antarctic Circumpolar Current. Year-long-mean currents exceed 10 cm s-1 north of the Polar Front, and mean directions are not, in general, aligned with the surface fronts. Topographic steering is most evident at the continental margins. Deep eddy kinetic energy (EKE) is maximum at about 200 cm2 s-2 between the Subantarctic and Polar Fronts, coinciding with the location but about one quarter of the value of a maximum in surface EKE. Multiple high-speed current events, with peak speeds of 60-70 cm s-1 and lasting 30 to 70 days, are coherent across sites separated by 45 km. The observed spinup of eddies coinciding with meanders in the surface fronts is consistent with deep cyclogenesis. Copyright 2009 by the American Geophysical Union. Text Antarc* Antarctic Drake Passage International Polar Year University of Rhode Island: DigitalCommons@URI Antarctic Drake Passage Geophysical Research Letters 36 23 |
institution |
Open Polar |
collection |
University of Rhode Island: DigitalCommons@URI |
op_collection_id |
ftunivrhodeislan |
language |
unknown |
description |
Observations from 38 bottom-moored Current and. Pressure Recording Inverted Echo Sounders (CPIES) deployed in Drake Passage during the 2007-2008 International Polar Year provide unprecedented coverage of near-bottom currents and pressures spanning the entire Antarctic Circumpolar Current. Year-long-mean currents exceed 10 cm s-1 north of the Polar Front, and mean directions are not, in general, aligned with the surface fronts. Topographic steering is most evident at the continental margins. Deep eddy kinetic energy (EKE) is maximum at about 200 cm2 s-2 between the Subantarctic and Polar Fronts, coinciding with the location but about one quarter of the value of a maximum in surface EKE. Multiple high-speed current events, with peak speeds of 60-70 cm s-1 and lasting 30 to 70 days, are coherent across sites separated by 45 km. The observed spinup of eddies coinciding with meanders in the surface fronts is consistent with deep cyclogenesis. Copyright 2009 by the American Geophysical Union. |
format |
Text |
author |
Chereskin, T. K. Donohue, K. A. Watts, D. R. Tracey, K. L. Firing, Y. L. Cutting, A. L. |
spellingShingle |
Chereskin, T. K. Donohue, K. A. Watts, D. R. Tracey, K. L. Firing, Y. L. Cutting, A. L. Strong bottom currents and cyclogenesis in Drake Passage |
author_facet |
Chereskin, T. K. Donohue, K. A. Watts, D. R. Tracey, K. L. Firing, Y. L. Cutting, A. L. |
author_sort |
Chereskin, T. K. |
title |
Strong bottom currents and cyclogenesis in Drake Passage |
title_short |
Strong bottom currents and cyclogenesis in Drake Passage |
title_full |
Strong bottom currents and cyclogenesis in Drake Passage |
title_fullStr |
Strong bottom currents and cyclogenesis in Drake Passage |
title_full_unstemmed |
Strong bottom currents and cyclogenesis in Drake Passage |
title_sort |
strong bottom currents and cyclogenesis in drake passage |
publisher |
DigitalCommons@URI |
publishDate |
2009 |
url |
https://digitalcommons.uri.edu/gsofacpubs/1221 https://doi.org/10.1029/2009GL040940 |
geographic |
Antarctic Drake Passage |
geographic_facet |
Antarctic Drake Passage |
genre |
Antarc* Antarctic Drake Passage International Polar Year |
genre_facet |
Antarc* Antarctic Drake Passage International Polar Year |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/1221 doi:10.1029/2009GL040940 https://doi.org/10.1029/2009GL040940 |
op_doi |
https://doi.org/10.1029/2009GL040940 |
container_title |
Geophysical Research Letters |
container_volume |
36 |
container_issue |
23 |
_version_ |
1784259866807762944 |