Oceanic forcing of the interhemispheric SST dipole associated with the Atlantic Multidecadal Oscillation
In this study, the interhemispheric sea surface temperature (SST) signature of the Atlantic Multidecadal Oscillation (AMO) is analyzed and compared between observations and slab ocean model (SOM) simulations. Observational analysis suggests a robust interhemispheric SST dipole across the Atlantic as...
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ftdoajarticles:oai:doaj.org/article:be842f0eefc84711a56dc3bb975df1af 2023-09-05T13:21:35+02:00 Oceanic forcing of the interhemispheric SST dipole associated with the Atlantic Multidecadal Oscillation Cheng Sun Jianping Li Xiang Li Jiaqing Xue Ruiqiang Ding Fei Xie Yang Li 2018-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/aacf66 https://doaj.org/article/be842f0eefc84711a56dc3bb975df1af EN eng IOP Publishing https://doi.org/10.1088/1748-9326/aacf66 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/aacf66 1748-9326 https://doaj.org/article/be842f0eefc84711a56dc3bb975df1af Environmental Research Letters, Vol 13, Iss 7, p 074026 (2018) Atlantic Multidecadal Oscillation Atlantic meridional overturning circulation ocean dynamics interhemispheric SST dipole Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2018 ftdoajarticles https://doi.org/10.1088/1748-9326/aacf66 2023-08-13T00:37:37Z In this study, the interhemispheric sea surface temperature (SST) signature of the Atlantic Multidecadal Oscillation (AMO) is analyzed and compared between observations and slab ocean model (SOM) simulations. Observational analysis suggests a robust interhemispheric SST dipole across the Atlantic associated with the AMO, manifested by a strong inverse relationship between the AMO and subpolar South Atlantic decadal SST anomalies. None of the SOMs analyzed could reproduce the observed interhemispheric dipole of the AMO; instead, they consistently simulate an interhemispheric coherent SST pattern. In the SOMs, the North Atlantic decadal SST anomalies synchronize the variations of South Atlantic SST through a cross-hemispheric atmosphere teleconnection and thermodynamic processes. This discrepancy between the SOM simulations and the observation is possibly due to deficiencies in representing ocean dynamical processes. Further analyses of the fully coupled versions of the SOMs suggest that the observed interhemispheric dipole of the AMO can be reproduced only by including ocean dynamics related to the Atlantic meridional overturning circulation. Our findings highlight that the ocean dynamics play a non-negligible role and should be taken into consideration in better understanding the observed feature of the AMO. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Environmental Research Letters 13 7 074026 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Atlantic Multidecadal Oscillation Atlantic meridional overturning circulation ocean dynamics interhemispheric SST dipole Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
Atlantic Multidecadal Oscillation Atlantic meridional overturning circulation ocean dynamics interhemispheric SST dipole Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Cheng Sun Jianping Li Xiang Li Jiaqing Xue Ruiqiang Ding Fei Xie Yang Li Oceanic forcing of the interhemispheric SST dipole associated with the Atlantic Multidecadal Oscillation |
topic_facet |
Atlantic Multidecadal Oscillation Atlantic meridional overturning circulation ocean dynamics interhemispheric SST dipole Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
In this study, the interhemispheric sea surface temperature (SST) signature of the Atlantic Multidecadal Oscillation (AMO) is analyzed and compared between observations and slab ocean model (SOM) simulations. Observational analysis suggests a robust interhemispheric SST dipole across the Atlantic associated with the AMO, manifested by a strong inverse relationship between the AMO and subpolar South Atlantic decadal SST anomalies. None of the SOMs analyzed could reproduce the observed interhemispheric dipole of the AMO; instead, they consistently simulate an interhemispheric coherent SST pattern. In the SOMs, the North Atlantic decadal SST anomalies synchronize the variations of South Atlantic SST through a cross-hemispheric atmosphere teleconnection and thermodynamic processes. This discrepancy between the SOM simulations and the observation is possibly due to deficiencies in representing ocean dynamical processes. Further analyses of the fully coupled versions of the SOMs suggest that the observed interhemispheric dipole of the AMO can be reproduced only by including ocean dynamics related to the Atlantic meridional overturning circulation. Our findings highlight that the ocean dynamics play a non-negligible role and should be taken into consideration in better understanding the observed feature of the AMO. |
format |
Article in Journal/Newspaper |
author |
Cheng Sun Jianping Li Xiang Li Jiaqing Xue Ruiqiang Ding Fei Xie Yang Li |
author_facet |
Cheng Sun Jianping Li Xiang Li Jiaqing Xue Ruiqiang Ding Fei Xie Yang Li |
author_sort |
Cheng Sun |
title |
Oceanic forcing of the interhemispheric SST dipole associated with the Atlantic Multidecadal Oscillation |
title_short |
Oceanic forcing of the interhemispheric SST dipole associated with the Atlantic Multidecadal Oscillation |
title_full |
Oceanic forcing of the interhemispheric SST dipole associated with the Atlantic Multidecadal Oscillation |
title_fullStr |
Oceanic forcing of the interhemispheric SST dipole associated with the Atlantic Multidecadal Oscillation |
title_full_unstemmed |
Oceanic forcing of the interhemispheric SST dipole associated with the Atlantic Multidecadal Oscillation |
title_sort |
oceanic forcing of the interhemispheric sst dipole associated with the atlantic multidecadal oscillation |
publisher |
IOP Publishing |
publishDate |
2018 |
url |
https://doi.org/10.1088/1748-9326/aacf66 https://doaj.org/article/be842f0eefc84711a56dc3bb975df1af |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Environmental Research Letters, Vol 13, Iss 7, p 074026 (2018) |
op_relation |
https://doi.org/10.1088/1748-9326/aacf66 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/aacf66 1748-9326 https://doaj.org/article/be842f0eefc84711a56dc3bb975df1af |
op_doi |
https://doi.org/10.1088/1748-9326/aacf66 |
container_title |
Environmental Research Letters |
container_volume |
13 |
container_issue |
7 |
container_start_page |
074026 |
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1776202176710836224 |