Contrasting trends in short-lived and long-lived mesoscale eddies in the Southern Ocean since the 1990s
Mesoscale eddies play an important role in the transport of heat, carbon, and nutrients in the Southern Ocean. Previous studies have documented an increasing intensity of the Southern Ocean eddy field during recent decades; however, it remains unclear whether the mesoscale eddies with different life...
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ftdoajarticles:oai:doaj.org/article:886e641d11914382ba595f78a9790466 2023-09-05T13:23:26+02:00 Contrasting trends in short-lived and long-lived mesoscale eddies in the Southern Ocean since the 1990s Fei Shi Yiyong Luo Renhao Wu Qinghua Yang Ruiyi Chen Chuanyin Wang Yichen Lin Dake Chen 2023-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/acbf6b https://doaj.org/article/886e641d11914382ba595f78a9790466 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/acbf6b https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/acbf6b 1748-9326 https://doaj.org/article/886e641d11914382ba595f78a9790466 Environmental Research Letters, Vol 18, Iss 3, p 034042 (2023) Southern Ocean mesoscale eddies climate change trends Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2023 ftdoajarticles https://doi.org/10.1088/1748-9326/acbf6b 2023-08-13T00:36:58Z Mesoscale eddies play an important role in the transport of heat, carbon, and nutrients in the Southern Ocean. Previous studies have documented an increasing intensity of the Southern Ocean eddy field during recent decades; however, it remains unclear whether the mesoscale eddies with different lifetimes have different temporal variations. Using satellite altimeter observations from 1993 to 2020, we found that the increasing trend in the intensity of eddies is dominated by long-lived eddies (with lifetimes ⩾ 90 d), whose amplitude has increased at a rate of ∼2.8% per decade; the increase is concentrated downstream of topography. In contrast, short-lived eddies (with lifetimes < 90 d) do not appear to have a significant trend in their amplitudes since the early 1990s. An energy conversion analysis indicates that the increased baroclinic instabilities of the mean flows associated with topography are responsible for the amplitude increase of the long-lived eddies. This study highlights the need for a better understanding of the changes in mesoscale eddies owing to their importance in the transport of heat, carbon, and nutrients. Article in Journal/Newspaper Southern Ocean Directory of Open Access Journals: DOAJ Articles Southern Ocean Environmental Research Letters 18 3 034042 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Southern Ocean mesoscale eddies climate change trends Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
Southern Ocean mesoscale eddies climate change trends Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Fei Shi Yiyong Luo Renhao Wu Qinghua Yang Ruiyi Chen Chuanyin Wang Yichen Lin Dake Chen Contrasting trends in short-lived and long-lived mesoscale eddies in the Southern Ocean since the 1990s |
topic_facet |
Southern Ocean mesoscale eddies climate change trends Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
Mesoscale eddies play an important role in the transport of heat, carbon, and nutrients in the Southern Ocean. Previous studies have documented an increasing intensity of the Southern Ocean eddy field during recent decades; however, it remains unclear whether the mesoscale eddies with different lifetimes have different temporal variations. Using satellite altimeter observations from 1993 to 2020, we found that the increasing trend in the intensity of eddies is dominated by long-lived eddies (with lifetimes ⩾ 90 d), whose amplitude has increased at a rate of ∼2.8% per decade; the increase is concentrated downstream of topography. In contrast, short-lived eddies (with lifetimes < 90 d) do not appear to have a significant trend in their amplitudes since the early 1990s. An energy conversion analysis indicates that the increased baroclinic instabilities of the mean flows associated with topography are responsible for the amplitude increase of the long-lived eddies. This study highlights the need for a better understanding of the changes in mesoscale eddies owing to their importance in the transport of heat, carbon, and nutrients. |
format |
Article in Journal/Newspaper |
author |
Fei Shi Yiyong Luo Renhao Wu Qinghua Yang Ruiyi Chen Chuanyin Wang Yichen Lin Dake Chen |
author_facet |
Fei Shi Yiyong Luo Renhao Wu Qinghua Yang Ruiyi Chen Chuanyin Wang Yichen Lin Dake Chen |
author_sort |
Fei Shi |
title |
Contrasting trends in short-lived and long-lived mesoscale eddies in the Southern Ocean since the 1990s |
title_short |
Contrasting trends in short-lived and long-lived mesoscale eddies in the Southern Ocean since the 1990s |
title_full |
Contrasting trends in short-lived and long-lived mesoscale eddies in the Southern Ocean since the 1990s |
title_fullStr |
Contrasting trends in short-lived and long-lived mesoscale eddies in the Southern Ocean since the 1990s |
title_full_unstemmed |
Contrasting trends in short-lived and long-lived mesoscale eddies in the Southern Ocean since the 1990s |
title_sort |
contrasting trends in short-lived and long-lived mesoscale eddies in the southern ocean since the 1990s |
publisher |
IOP Publishing |
publishDate |
2023 |
url |
https://doi.org/10.1088/1748-9326/acbf6b https://doaj.org/article/886e641d11914382ba595f78a9790466 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Environmental Research Letters, Vol 18, Iss 3, p 034042 (2023) |
op_relation |
https://doi.org/10.1088/1748-9326/acbf6b https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/acbf6b 1748-9326 https://doaj.org/article/886e641d11914382ba595f78a9790466 |
op_doi |
https://doi.org/10.1088/1748-9326/acbf6b |
container_title |
Environmental Research Letters |
container_volume |
18 |
container_issue |
3 |
container_start_page |
034042 |
_version_ |
1776204020864516096 |