Using Kinetic Energy Measurements from Altimetry to Detect Shifts in the Positions of Fronts in the Southern Ocean
A novel analysis is performed utilizing cross-track kinetic energy (CKE) computed from along-track sea surface height anomalies. The midpoint of enhanced kinetic energy averaged over 3-year periods from 1993 to 2016 is determined across the Southern Ocean and examined to detect shifts in frontal pos...
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Digital Commons @ University of South Florida
2018
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-2421 2023-07-30T03:58:42+02:00 Using Kinetic Energy Measurements from Altimetry to Detect Shifts in the Positions of Fronts in the Southern Ocean Chambers, Don P. 2018-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/1397 https://doi.org/10.5194/os-14-105-2018 https://digitalcommons.usf.edu/context/msc_facpub/article/2421/viewcontent/os_14_105_2018.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/1397 doi:10.5194/os-14-105-2018 https://digitalcommons.usf.edu/context/msc_facpub/article/2421/viewcontent/os_14_105_2018.pdf http://creativecommons.org/licenses/by/4.0/ Marine Science Faculty Publications Life Sciences article 2018 ftusouthflorida https://doi.org/10.5194/os-14-105-2018 2023-07-13T21:02:15Z A novel analysis is performed utilizing cross-track kinetic energy (CKE) computed from along-track sea surface height anomalies. The midpoint of enhanced kinetic energy averaged over 3-year periods from 1993 to 2016 is determined across the Southern Ocean and examined to detect shifts in frontal positions, based on previous observations that kinetic energy is high around fronts in the Antarctic Circumpolar Current system due to jet instabilities. It is demonstrated that although the CKE does not represent the full eddy kinetic energy (computed from crossovers), the shape of the enhanced regions along ground tracks is the same, and CKE has a much finer spatial sampling of 6.9 km. Results indicate no significant shift in the front positions across the Southern Ocean, on average, although there are some localized, large movements. This is consistent with other studies utilizing sea surface temperature gradients, the latitude of mean transport, and the probability of jet occurrence, but is inconsistent with studies utilizing the movement of contours of dynamic topography. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of South Florida St. Petersburg: Digital USFSP Antarctic Southern Ocean The Antarctic Ocean Science 14 1 105 116 |
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Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Life Sciences |
spellingShingle |
Life Sciences Chambers, Don P. Using Kinetic Energy Measurements from Altimetry to Detect Shifts in the Positions of Fronts in the Southern Ocean |
topic_facet |
Life Sciences |
description |
A novel analysis is performed utilizing cross-track kinetic energy (CKE) computed from along-track sea surface height anomalies. The midpoint of enhanced kinetic energy averaged over 3-year periods from 1993 to 2016 is determined across the Southern Ocean and examined to detect shifts in frontal positions, based on previous observations that kinetic energy is high around fronts in the Antarctic Circumpolar Current system due to jet instabilities. It is demonstrated that although the CKE does not represent the full eddy kinetic energy (computed from crossovers), the shape of the enhanced regions along ground tracks is the same, and CKE has a much finer spatial sampling of 6.9 km. Results indicate no significant shift in the front positions across the Southern Ocean, on average, although there are some localized, large movements. This is consistent with other studies utilizing sea surface temperature gradients, the latitude of mean transport, and the probability of jet occurrence, but is inconsistent with studies utilizing the movement of contours of dynamic topography. |
format |
Article in Journal/Newspaper |
author |
Chambers, Don P. |
author_facet |
Chambers, Don P. |
author_sort |
Chambers, Don P. |
title |
Using Kinetic Energy Measurements from Altimetry to Detect Shifts in the Positions of Fronts in the Southern Ocean |
title_short |
Using Kinetic Energy Measurements from Altimetry to Detect Shifts in the Positions of Fronts in the Southern Ocean |
title_full |
Using Kinetic Energy Measurements from Altimetry to Detect Shifts in the Positions of Fronts in the Southern Ocean |
title_fullStr |
Using Kinetic Energy Measurements from Altimetry to Detect Shifts in the Positions of Fronts in the Southern Ocean |
title_full_unstemmed |
Using Kinetic Energy Measurements from Altimetry to Detect Shifts in the Positions of Fronts in the Southern Ocean |
title_sort |
using kinetic energy measurements from altimetry to detect shifts in the positions of fronts in the southern ocean |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2018 |
url |
https://digitalcommons.usf.edu/msc_facpub/1397 https://doi.org/10.5194/os-14-105-2018 https://digitalcommons.usf.edu/context/msc_facpub/article/2421/viewcontent/os_14_105_2018.pdf |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic 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/1397 doi:10.5194/os-14-105-2018 https://digitalcommons.usf.edu/context/msc_facpub/article/2421/viewcontent/os_14_105_2018.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5194/os-14-105-2018 |
container_title |
Ocean Science |
container_volume |
14 |
container_issue |
1 |
container_start_page |
105 |
op_container_end_page |
116 |
_version_ |
1772821437751492608 |