Impact of ocean model resolution on understanding the delayed warming of the Southern Ocean
Currently available historical climate change simulations indicate a relatively delayed Southern Ocean warming, particularly poleward of the Antarctic Circumpolar Current (ACC) compared much of the rest of the globe. However, even this simulated delayed warming is inconsistent with observational est...
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Online Access: | https://doi.org/10.1088/1748-9326/abbc3e https://doaj.org/article/a276976ad93849bea5032a32e929fbb9 |
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ftdoajarticles:oai:doaj.org/article:a276976ad93849bea5032a32e929fbb9 2023-09-05T13:15:20+02:00 Impact of ocean model resolution on understanding the delayed warming of the Southern Ocean Simge I Bilgen Ben P Kirtman 2020-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/abbc3e https://doaj.org/article/a276976ad93849bea5032a32e929fbb9 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/abbc3e https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/abbc3e 1748-9326 https://doaj.org/article/a276976ad93849bea5032a32e929fbb9 Environmental Research Letters, Vol 15, Iss 11, p 114012 (2020) delayed warming greenhouse gas forcing eddy resolving and eddy parameterized models Southern Ocean climate Southern Ocean SST trends Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2020 ftdoajarticles https://doi.org/10.1088/1748-9326/abbc3e 2023-08-13T00:37:16Z Currently available historical climate change simulations indicate a relatively delayed Southern Ocean warming, particularly poleward of the Antarctic Circumpolar Current (ACC) compared much of the rest of the globe. However, even this simulated delayed warming is inconsistent with observational estimates which show a cooling trend poleward of the ACC for the period 1979–2014. A fully coupled model run at two resolutions, i.e. ocean eddy parameterized and ocean eddy resolving, driven by historical and fixed CO2 concentration is used to investigate forced trends south of the ACC. We analyze the 1961–2005 Southern Ocean surface and upper ocean temperatures trends simulated by the model and observational estimates to understand the observed trends in the SO. At both resolutions, the models successfully reproduce the observed warming response for the northern flank of the ACC. The eddy resolving simulations, however, are able to reproduce the observed near Antarctic cooling in contrast to the eddy parameterized simulation which shows a warming trend. The cause of this inconsistency between the observations and the ocean eddy parameterized climate models is still a matter of debate, and we show here results that suggest resolved ocean meso-scale processes may be an integral part of capturing the observed trends in the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Environmental Research Letters 15 11 114012 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
delayed warming greenhouse gas forcing eddy resolving and eddy parameterized models Southern Ocean climate Southern Ocean SST trends Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
delayed warming greenhouse gas forcing eddy resolving and eddy parameterized models Southern Ocean climate Southern Ocean SST trends Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Simge I Bilgen Ben P Kirtman Impact of ocean model resolution on understanding the delayed warming of the Southern Ocean |
topic_facet |
delayed warming greenhouse gas forcing eddy resolving and eddy parameterized models Southern Ocean climate Southern Ocean SST trends Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
Currently available historical climate change simulations indicate a relatively delayed Southern Ocean warming, particularly poleward of the Antarctic Circumpolar Current (ACC) compared much of the rest of the globe. However, even this simulated delayed warming is inconsistent with observational estimates which show a cooling trend poleward of the ACC for the period 1979–2014. A fully coupled model run at two resolutions, i.e. ocean eddy parameterized and ocean eddy resolving, driven by historical and fixed CO2 concentration is used to investigate forced trends south of the ACC. We analyze the 1961–2005 Southern Ocean surface and upper ocean temperatures trends simulated by the model and observational estimates to understand the observed trends in the SO. At both resolutions, the models successfully reproduce the observed warming response for the northern flank of the ACC. The eddy resolving simulations, however, are able to reproduce the observed near Antarctic cooling in contrast to the eddy parameterized simulation which shows a warming trend. The cause of this inconsistency between the observations and the ocean eddy parameterized climate models is still a matter of debate, and we show here results that suggest resolved ocean meso-scale processes may be an integral part of capturing the observed trends in the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Simge I Bilgen Ben P Kirtman |
author_facet |
Simge I Bilgen Ben P Kirtman |
author_sort |
Simge I Bilgen |
title |
Impact of ocean model resolution on understanding the delayed warming of the Southern Ocean |
title_short |
Impact of ocean model resolution on understanding the delayed warming of the Southern Ocean |
title_full |
Impact of ocean model resolution on understanding the delayed warming of the Southern Ocean |
title_fullStr |
Impact of ocean model resolution on understanding the delayed warming of the Southern Ocean |
title_full_unstemmed |
Impact of ocean model resolution on understanding the delayed warming of the Southern Ocean |
title_sort |
impact of ocean model resolution on understanding the delayed warming of the southern ocean |
publisher |
IOP Publishing |
publishDate |
2020 |
url |
https://doi.org/10.1088/1748-9326/abbc3e https://doaj.org/article/a276976ad93849bea5032a32e929fbb9 |
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 |
Environmental Research Letters, Vol 15, Iss 11, p 114012 (2020) |
op_relation |
https://doi.org/10.1088/1748-9326/abbc3e https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/abbc3e 1748-9326 https://doaj.org/article/a276976ad93849bea5032a32e929fbb9 |
op_doi |
https://doi.org/10.1088/1748-9326/abbc3e |
container_title |
Environmental Research Letters |
container_volume |
15 |
container_issue |
11 |
container_start_page |
114012 |
_version_ |
1776197138781306880 |