Sensitivity of the Atlantic meridional overturning circulation to model resolution in CMIP6 HighResMIP simulations and implications for future changes
A multimodel, multiresolution ensemble using Coupled Model Intercomparison Project Phase 6 (CMIP6) High Resolution Model Intercomparison Project (HighResMIP) coupled experiments is used to assess the performance of key aspects of the North Atlantic circulation. The Atlantic Meridional Overturning Ci...
Published in: | Journal of Advances in Modeling Earth Systems |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/529003/ https://nora.nerc.ac.uk/id/eprint/529003/1/2019MS002014.pdf https://doi.org/10.1029/2019MS002014 |
id |
ftnerc:oai:nora.nerc.ac.uk:529003 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:529003 2023-05-15T17:34:04+02:00 Sensitivity of the Atlantic meridional overturning circulation to model resolution in CMIP6 HighResMIP simulations and implications for future changes Roberts, Malcolm J. Jackson, Laura C. Roberts, Christopher D. Meccia, Virna Docquier, David Koenigk, Torben Ortega, Pablo Moreno‐Chamarro, Eduardo Bellucci, Alessio Coward, Andrew Drijfhout, Sybren Exarchou, Eleftheria Gutjahr, Oliver Hewitt, Helene Iovino, Doroteaciro Lohmann, Katja Putrasahan, Dian Schiemann, Reinhard Seddon, Jon Terray, Laurent Xu, Xiaobiao Zhang, Qiuying Chang, Ping Yeager, Stephen G. Castruccio, Frederic S. Zhang, Shaoqing Wu, Lixin 2020-08-08 text http://nora.nerc.ac.uk/id/eprint/529003/ https://nora.nerc.ac.uk/id/eprint/529003/1/2019MS002014.pdf https://doi.org/10.1029/2019MS002014 en eng https://nora.nerc.ac.uk/id/eprint/529003/1/2019MS002014.pdf Roberts, Malcolm J.; Jackson, Laura C.; Roberts, Christopher D.; Meccia, Virna; Docquier, David; Koenigk, Torben; Ortega, Pablo; Moreno‐Chamarro, Eduardo; Bellucci, Alessio; Coward, Andrew orcid:0000-0002-9111-7700 Drijfhout, Sybren; Exarchou, Eleftheria; Gutjahr, Oliver; Hewitt, Helene; Iovino, Doroteaciro; Lohmann, Katja; Putrasahan, Dian; Schiemann, Reinhard; Seddon, Jon; Terray, Laurent; Xu, Xiaobiao; Zhang, Qiuying; Chang, Ping; Yeager, Stephen G.; Castruccio, Frederic S.; Zhang, Shaoqing; Wu, Lixin. 2020 Sensitivity of the Atlantic meridional overturning circulation to model resolution in CMIP6 HighResMIP simulations and implications for future changes. Journal of Advances in Modeling Earth Systems, 12 (8), e2019MS002014. https://doi.org/10.1029/2019MS002014 <https://doi.org/10.1029/2019MS002014> cc_by_4 CC-BY Publication - Article PeerReviewed 2020 ftnerc https://doi.org/10.1029/2019MS002014 2023-02-04T19:51:22Z A multimodel, multiresolution ensemble using Coupled Model Intercomparison Project Phase 6 (CMIP6) High Resolution Model Intercomparison Project (HighResMIP) coupled experiments is used to assess the performance of key aspects of the North Atlantic circulation. The Atlantic Meridional Overturning Circulation (AMOC), and related heat transport, tends to become stronger as ocean model resolution is enhanced, better agreeing with observations at 26.5°N. However, for most models the circulation remains too shallow compared to observations and has a smaller temperature contrast between the northward and southward limbs of the AMOC. These biases cause the northward heat transport to be systematically too low for a given overturning strength. The higher‐resolution models also tend to have too much deep mixing in the subpolar gyre. In the period 2015–2050 the overturning circulation tends to decline more rapidly in the higher‐resolution models, which is related to both the mean state and to the subpolar gyre contribution to deep water formation. The main part of the decline comes from the Florida Current component of the circulation. Such large declines in AMOC are not seen in the models with resolutions more typically used for climate studies, suggesting an enhanced risk for Northern Hemisphere climate change. However, only a small number of different ocean models are included in the study. Article in Journal/Newspaper North Atlantic Natural Environment Research Council: NERC Open Research Archive Journal of Advances in Modeling Earth Systems 12 8 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
A multimodel, multiresolution ensemble using Coupled Model Intercomparison Project Phase 6 (CMIP6) High Resolution Model Intercomparison Project (HighResMIP) coupled experiments is used to assess the performance of key aspects of the North Atlantic circulation. The Atlantic Meridional Overturning Circulation (AMOC), and related heat transport, tends to become stronger as ocean model resolution is enhanced, better agreeing with observations at 26.5°N. However, for most models the circulation remains too shallow compared to observations and has a smaller temperature contrast between the northward and southward limbs of the AMOC. These biases cause the northward heat transport to be systematically too low for a given overturning strength. The higher‐resolution models also tend to have too much deep mixing in the subpolar gyre. In the period 2015–2050 the overturning circulation tends to decline more rapidly in the higher‐resolution models, which is related to both the mean state and to the subpolar gyre contribution to deep water formation. The main part of the decline comes from the Florida Current component of the circulation. Such large declines in AMOC are not seen in the models with resolutions more typically used for climate studies, suggesting an enhanced risk for Northern Hemisphere climate change. However, only a small number of different ocean models are included in the study. |
format |
Article in Journal/Newspaper |
author |
Roberts, Malcolm J. Jackson, Laura C. Roberts, Christopher D. Meccia, Virna Docquier, David Koenigk, Torben Ortega, Pablo Moreno‐Chamarro, Eduardo Bellucci, Alessio Coward, Andrew Drijfhout, Sybren Exarchou, Eleftheria Gutjahr, Oliver Hewitt, Helene Iovino, Doroteaciro Lohmann, Katja Putrasahan, Dian Schiemann, Reinhard Seddon, Jon Terray, Laurent Xu, Xiaobiao Zhang, Qiuying Chang, Ping Yeager, Stephen G. Castruccio, Frederic S. Zhang, Shaoqing Wu, Lixin |
spellingShingle |
Roberts, Malcolm J. Jackson, Laura C. Roberts, Christopher D. Meccia, Virna Docquier, David Koenigk, Torben Ortega, Pablo Moreno‐Chamarro, Eduardo Bellucci, Alessio Coward, Andrew Drijfhout, Sybren Exarchou, Eleftheria Gutjahr, Oliver Hewitt, Helene Iovino, Doroteaciro Lohmann, Katja Putrasahan, Dian Schiemann, Reinhard Seddon, Jon Terray, Laurent Xu, Xiaobiao Zhang, Qiuying Chang, Ping Yeager, Stephen G. Castruccio, Frederic S. Zhang, Shaoqing Wu, Lixin Sensitivity of the Atlantic meridional overturning circulation to model resolution in CMIP6 HighResMIP simulations and implications for future changes |
author_facet |
Roberts, Malcolm J. Jackson, Laura C. Roberts, Christopher D. Meccia, Virna Docquier, David Koenigk, Torben Ortega, Pablo Moreno‐Chamarro, Eduardo Bellucci, Alessio Coward, Andrew Drijfhout, Sybren Exarchou, Eleftheria Gutjahr, Oliver Hewitt, Helene Iovino, Doroteaciro Lohmann, Katja Putrasahan, Dian Schiemann, Reinhard Seddon, Jon Terray, Laurent Xu, Xiaobiao Zhang, Qiuying Chang, Ping Yeager, Stephen G. Castruccio, Frederic S. Zhang, Shaoqing Wu, Lixin |
author_sort |
Roberts, Malcolm J. |
title |
Sensitivity of the Atlantic meridional overturning circulation to model resolution in CMIP6 HighResMIP simulations and implications for future changes |
title_short |
Sensitivity of the Atlantic meridional overturning circulation to model resolution in CMIP6 HighResMIP simulations and implications for future changes |
title_full |
Sensitivity of the Atlantic meridional overturning circulation to model resolution in CMIP6 HighResMIP simulations and implications for future changes |
title_fullStr |
Sensitivity of the Atlantic meridional overturning circulation to model resolution in CMIP6 HighResMIP simulations and implications for future changes |
title_full_unstemmed |
Sensitivity of the Atlantic meridional overturning circulation to model resolution in CMIP6 HighResMIP simulations and implications for future changes |
title_sort |
sensitivity of the atlantic meridional overturning circulation to model resolution in cmip6 highresmip simulations and implications for future changes |
publishDate |
2020 |
url |
http://nora.nerc.ac.uk/id/eprint/529003/ https://nora.nerc.ac.uk/id/eprint/529003/1/2019MS002014.pdf https://doi.org/10.1029/2019MS002014 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/529003/1/2019MS002014.pdf Roberts, Malcolm J.; Jackson, Laura C.; Roberts, Christopher D.; Meccia, Virna; Docquier, David; Koenigk, Torben; Ortega, Pablo; Moreno‐Chamarro, Eduardo; Bellucci, Alessio; Coward, Andrew orcid:0000-0002-9111-7700 Drijfhout, Sybren; Exarchou, Eleftheria; Gutjahr, Oliver; Hewitt, Helene; Iovino, Doroteaciro; Lohmann, Katja; Putrasahan, Dian; Schiemann, Reinhard; Seddon, Jon; Terray, Laurent; Xu, Xiaobiao; Zhang, Qiuying; Chang, Ping; Yeager, Stephen G.; Castruccio, Frederic S.; Zhang, Shaoqing; Wu, Lixin. 2020 Sensitivity of the Atlantic meridional overturning circulation to model resolution in CMIP6 HighResMIP simulations and implications for future changes. Journal of Advances in Modeling Earth Systems, 12 (8), e2019MS002014. https://doi.org/10.1029/2019MS002014 <https://doi.org/10.1029/2019MS002014> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2019MS002014 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
12 |
container_issue |
8 |
_version_ |
1766132767913934848 |