Insights into decadal North Atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model
A novel ocean mixed layer heat budget analysis methodology is developed and used to investigate the physicalprocesses which determine Subpolar North Atlantic (SPNA) SST and OHC variability on decadal-multidecadaltimescales using the state-of-the-art coupled climate model HadGEM3-GC2. Contributions t...
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Online Access: | https://dx.doi.org/10.5281/zenodo.3475991 https://zenodo.org/record/3475991 |
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ftdatacite:10.5281/zenodo.3475991 2023-05-15T17:30:24+02:00 Insights into decadal North Atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model Moat, Ben Sinha, Bablu Robson, Jon Ortega, Pablo Sevellec, Florian Holliday, N. Penny McCarthy, Gerard New, Adrian Hirschi, Joel 2019 https://dx.doi.org/10.5281/zenodo.3475991 https://zenodo.org/record/3475991 unknown Zenodo https://zenodo.org/communities/blue-actionh2020 https://dx.doi.org/10.5281/zenodo.3475992 https://zenodo.org/communities/blue-actionh2020 Open Access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 info:eu-repo/semantics/openAccess CC-BY Text Poster article-journal ScholarlyArticle 2019 ftdatacite https://doi.org/10.5281/zenodo.3475991 https://doi.org/10.5281/zenodo.3475992 2021-11-05T12:55:41Z A novel ocean mixed layer heat budget analysis methodology is developed and used to investigate the physicalprocesses which determine Subpolar North Atlantic (SPNA) SST and OHC variability on decadal-multidecadaltimescales using the state-of-the-art coupled climate model HadGEM3-GC2. Contributions to OHC and SSTvariability from three sources are evaluated i) the net ocean-atmosphere heat flux, ii) divergence of the oceanichorizontal temperature transport and iii) entrainment between the ocean surface mixed layer and the layer beneath.Anomalies in OHC and SST tendency propagate anticlockwise around the SPNA on multidecadal timescaleswith a clear relationship to the Phase of the AMOC. AMOC anomalies lead SST tendencies which in turn leadOHC tendencies. This result is common to both eastern and western SPNA, although the primary driver of OHCvariability differs with surface fluxes dominant in the west and advection-diffusion in the east. The reciprocal ofthe mixed layer depth is found to be an important variable which causes SST to respond faster to AMOC changesthan OHC. The implications of these new results for interpretation of lower resolution coupled models, includingmany of those used in the CMIP6 assessment are discussed. Still Image North Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
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description |
A novel ocean mixed layer heat budget analysis methodology is developed and used to investigate the physicalprocesses which determine Subpolar North Atlantic (SPNA) SST and OHC variability on decadal-multidecadaltimescales using the state-of-the-art coupled climate model HadGEM3-GC2. Contributions to OHC and SSTvariability from three sources are evaluated i) the net ocean-atmosphere heat flux, ii) divergence of the oceanichorizontal temperature transport and iii) entrainment between the ocean surface mixed layer and the layer beneath.Anomalies in OHC and SST tendency propagate anticlockwise around the SPNA on multidecadal timescaleswith a clear relationship to the Phase of the AMOC. AMOC anomalies lead SST tendencies which in turn leadOHC tendencies. This result is common to both eastern and western SPNA, although the primary driver of OHCvariability differs with surface fluxes dominant in the west and advection-diffusion in the east. The reciprocal ofthe mixed layer depth is found to be an important variable which causes SST to respond faster to AMOC changesthan OHC. The implications of these new results for interpretation of lower resolution coupled models, includingmany of those used in the CMIP6 assessment are discussed. |
format |
Still Image |
author |
Moat, Ben Sinha, Bablu Robson, Jon Ortega, Pablo Sevellec, Florian Holliday, N. Penny McCarthy, Gerard New, Adrian Hirschi, Joel |
spellingShingle |
Moat, Ben Sinha, Bablu Robson, Jon Ortega, Pablo Sevellec, Florian Holliday, N. Penny McCarthy, Gerard New, Adrian Hirschi, Joel Insights into decadal North Atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model |
author_facet |
Moat, Ben Sinha, Bablu Robson, Jon Ortega, Pablo Sevellec, Florian Holliday, N. Penny McCarthy, Gerard New, Adrian Hirschi, Joel |
author_sort |
Moat, Ben |
title |
Insights into decadal North Atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model |
title_short |
Insights into decadal North Atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model |
title_full |
Insights into decadal North Atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model |
title_fullStr |
Insights into decadal North Atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model |
title_full_unstemmed |
Insights into decadal North Atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model |
title_sort |
insights into decadal north atlantic sea surface temperature and ocean heat content variability from an eddy-permitting coupled climate model |
publisher |
Zenodo |
publishDate |
2019 |
url |
https://dx.doi.org/10.5281/zenodo.3475991 https://zenodo.org/record/3475991 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://zenodo.org/communities/blue-actionh2020 https://dx.doi.org/10.5281/zenodo.3475992 https://zenodo.org/communities/blue-actionh2020 |
op_rights |
Open Access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5281/zenodo.3475991 https://doi.org/10.5281/zenodo.3475992 |
_version_ |
1766126782381031424 |