Southern Ocean Velocity and Geostrophic Transport Fields Estimated by Combining Jason Altimetry and Argo Data
Zonal geostrophic velocity fields above 1975 dbar have been estimated for the Southern Ocean from 2004 into 2011 based on sea surface topography observed by Jason altimetry and temperature/salinity measured by Argo autonomous floats. The velocity at 1000 dbar estimated with the method has been compa...
Published in: | Journal of Geophysical Research: Oceans |
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-2408 2023-07-30T03:59:07+02:00 Southern Ocean Velocity and Geostrophic Transport Fields Estimated by Combining Jason Altimetry and Argo Data Kosempa, Michael Chambers, Don P. 2014-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/1410 https://doi.org/10.1002/2014JC009853 https://digitalcommons.usf.edu/context/msc_facpub/article/2408/viewcontent/2014JC009853.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/1410 doi:10.1002/2014JC009853 https://digitalcommons.usf.edu/context/msc_facpub/article/2408/viewcontent/2014JC009853.pdf Marine Science Faculty Publications Antarctic Circumpolar Current Jason altimetry Argo dynamic ocean topography transport geostrophic Life Sciences article 2014 ftusouthflorida https://doi.org/10.1002/2014JC009853 2023-07-13T21:02:06Z Zonal geostrophic velocity fields above 1975 dbar have been estimated for the Southern Ocean from 2004 into 2011 based on sea surface topography observed by Jason altimetry and temperature/salinity measured by Argo autonomous floats. The velocity at 1000 dbar estimated with the method has been compared to Argo drift trajectory at the same pressure level available from the Asia Pacific Data Research Center (APDRC). The inferred velocities agree with those from the Argo drift within the estimated sampling error of the latter, but have fewer gaps in space and time. The velocity has also been integrated from depth to surface to determine the mean and time-variable zonal geostrophic transport in the Southern Ocean between 29.5°S and 58.5°S, primarily in the South Atlantic and South Indian Ocean basins, due to limitations in coverage of Argo. Analysis shows errors can be reduced by > 70% by averaging gridded results over wide areas. Zonal transport averaged over the entire Indian Ocean basin shows a significant correlation with the Antarctic Oscillation (AAO) at low frequencies: transport is higher than normal during a positive phase of the AAO, and lower during the negative phase. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of South Florida St. Petersburg: Digital USFSP Antarctic Indian Pacific Southern Ocean The Antarctic Journal of Geophysical Research: Oceans 119 8 4761 4776 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Antarctic Circumpolar Current Jason altimetry Argo dynamic ocean topography transport geostrophic Life Sciences |
spellingShingle |
Antarctic Circumpolar Current Jason altimetry Argo dynamic ocean topography transport geostrophic Life Sciences Kosempa, Michael Chambers, Don P. Southern Ocean Velocity and Geostrophic Transport Fields Estimated by Combining Jason Altimetry and Argo Data |
topic_facet |
Antarctic Circumpolar Current Jason altimetry Argo dynamic ocean topography transport geostrophic Life Sciences |
description |
Zonal geostrophic velocity fields above 1975 dbar have been estimated for the Southern Ocean from 2004 into 2011 based on sea surface topography observed by Jason altimetry and temperature/salinity measured by Argo autonomous floats. The velocity at 1000 dbar estimated with the method has been compared to Argo drift trajectory at the same pressure level available from the Asia Pacific Data Research Center (APDRC). The inferred velocities agree with those from the Argo drift within the estimated sampling error of the latter, but have fewer gaps in space and time. The velocity has also been integrated from depth to surface to determine the mean and time-variable zonal geostrophic transport in the Southern Ocean between 29.5°S and 58.5°S, primarily in the South Atlantic and South Indian Ocean basins, due to limitations in coverage of Argo. Analysis shows errors can be reduced by > 70% by averaging gridded results over wide areas. Zonal transport averaged over the entire Indian Ocean basin shows a significant correlation with the Antarctic Oscillation (AAO) at low frequencies: transport is higher than normal during a positive phase of the AAO, and lower during the negative phase. |
format |
Article in Journal/Newspaper |
author |
Kosempa, Michael Chambers, Don P. |
author_facet |
Kosempa, Michael Chambers, Don P. |
author_sort |
Kosempa, Michael |
title |
Southern Ocean Velocity and Geostrophic Transport Fields Estimated by Combining Jason Altimetry and Argo Data |
title_short |
Southern Ocean Velocity and Geostrophic Transport Fields Estimated by Combining Jason Altimetry and Argo Data |
title_full |
Southern Ocean Velocity and Geostrophic Transport Fields Estimated by Combining Jason Altimetry and Argo Data |
title_fullStr |
Southern Ocean Velocity and Geostrophic Transport Fields Estimated by Combining Jason Altimetry and Argo Data |
title_full_unstemmed |
Southern Ocean Velocity and Geostrophic Transport Fields Estimated by Combining Jason Altimetry and Argo Data |
title_sort |
southern ocean velocity and geostrophic transport fields estimated by combining jason altimetry and argo data |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2014 |
url |
https://digitalcommons.usf.edu/msc_facpub/1410 https://doi.org/10.1002/2014JC009853 https://digitalcommons.usf.edu/context/msc_facpub/article/2408/viewcontent/2014JC009853.pdf |
geographic |
Antarctic Indian Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Indian Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/1410 doi:10.1002/2014JC009853 https://digitalcommons.usf.edu/context/msc_facpub/article/2408/viewcontent/2014JC009853.pdf |
op_doi |
https://doi.org/10.1002/2014JC009853 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
8 |
container_start_page |
4761 |
op_container_end_page |
4776 |
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1772809826706915328 |