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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ftdoajarticles:oai:doaj.org/article:616881a5aa2d45a3856f9424bf2288a3 2023-05-15T13:33:51+02:00 Using kinetic energy measurements from altimetry to detect shifts in the positions of fronts in the Southern Ocean D. P. Chambers 2018-02-01T00:00:00Z https://doi.org/10.5194/os-14-105-2018 https://doaj.org/article/616881a5aa2d45a3856f9424bf2288a3 EN eng Copernicus Publications https://www.ocean-sci.net/14/105/2018/os-14-105-2018.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 doi:10.5194/os-14-105-2018 1812-0784 1812-0792 https://doaj.org/article/616881a5aa2d45a3856f9424bf2288a3 Ocean Science, Vol 14, Pp 105-116 (2018) Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2018 ftdoajarticles https://doi.org/10.5194/os-14-105-2018 2022-12-30T21:18:41Z 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 Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Ocean Science 14 1 105 116 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 D. P. Chambers Using kinetic energy measurements from altimetry to detect shifts in the positions of fronts in the Southern Ocean |
topic_facet |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
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 |
D. P. Chambers |
author_facet |
D. P. Chambers |
author_sort |
D. P. Chambers |
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 |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/os-14-105-2018 https://doaj.org/article/616881a5aa2d45a3856f9424bf2288a3 |
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 |
Ocean Science, Vol 14, Pp 105-116 (2018) |
op_relation |
https://www.ocean-sci.net/14/105/2018/os-14-105-2018.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 doi:10.5194/os-14-105-2018 1812-0784 1812-0792 https://doaj.org/article/616881a5aa2d45a3856f9424bf2288a3 |
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_ |
1766046551373774848 |