Acute sensitivity of global ocean circulation and heat content to eddy energy dissipation time‐scale
The global ocean overturning circulation, critically dependent on the global density stratification, plays a central role in regulating climate evolution. While it is well-known that the global stratification profile exhibits a strong dependence to Southern Ocean dynamics and in particular to wind a...
Published in: | Geophysical Research Letters |
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Online Access: | https://doi.org/10.1029/2021gl097259 https://ora.ox.ac.uk/objects/uuid:3a0a8cbe-02e5-4d04-9e86-c1d0170175b9 |
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ftuloxford:oai:ora.ox.ac.uk:uuid:3a0a8cbe-02e5-4d04-9e86-c1d0170175b9 2023-05-15T14:00:22+02:00 Acute sensitivity of global ocean circulation and heat content to eddy energy dissipation time‐scale Mak, J Marshall, DP Madec, G Maddision, JR 2022-04-13 https://doi.org/10.1029/2021gl097259 https://ora.ox.ac.uk/objects/uuid:3a0a8cbe-02e5-4d04-9e86-c1d0170175b9 eng eng Wiley doi:10.1029/2021gl097259 https://ora.ox.ac.uk/objects/uuid:3a0a8cbe-02e5-4d04-9e86-c1d0170175b9 https://doi.org/10.1029/2021gl097259 info:eu-repo/semantics/openAccess CC Attribution (CC BY) CC-BY Journal article 2022 ftuloxford https://doi.org/10.1029/2021gl097259 2022-06-28T20:29:26Z The global ocean overturning circulation, critically dependent on the global density stratification, plays a central role in regulating climate evolution. While it is well-known that the global stratification profile exhibits a strong dependence to Southern Ocean dynamics and in particular to wind and buoyancy forcing, we demonstrate here that the stratification is also acutely sensitive to the mesoscale eddy energy dissipation time-scale. Within the context of a global ocean circulation model with an energy constrained mesoscale eddy parameterization, it is shown that modest variations in the eddy energy dissipation time-scale lead to significant variations in key metrics relating to ocean circulation, namely the Antarctic Circumpolar Current transport, Atlantic Meridional Overturning Circulation strength, and global ocean heat content, over long time-scales. The results highlight a need to constrain uncertainties associated with eddy energy dissipation for climate model projections over centennial time-scales, but also for paleoclimate simulations over millennial time-scales. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean ORA - Oxford University Research Archive Antarctic Southern Ocean The Antarctic Geophysical Research Letters 49 8 |
institution |
Open Polar |
collection |
ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
English |
description |
The global ocean overturning circulation, critically dependent on the global density stratification, plays a central role in regulating climate evolution. While it is well-known that the global stratification profile exhibits a strong dependence to Southern Ocean dynamics and in particular to wind and buoyancy forcing, we demonstrate here that the stratification is also acutely sensitive to the mesoscale eddy energy dissipation time-scale. Within the context of a global ocean circulation model with an energy constrained mesoscale eddy parameterization, it is shown that modest variations in the eddy energy dissipation time-scale lead to significant variations in key metrics relating to ocean circulation, namely the Antarctic Circumpolar Current transport, Atlantic Meridional Overturning Circulation strength, and global ocean heat content, over long time-scales. The results highlight a need to constrain uncertainties associated with eddy energy dissipation for climate model projections over centennial time-scales, but also for paleoclimate simulations over millennial time-scales. |
format |
Article in Journal/Newspaper |
author |
Mak, J Marshall, DP Madec, G Maddision, JR |
spellingShingle |
Mak, J Marshall, DP Madec, G Maddision, JR Acute sensitivity of global ocean circulation and heat content to eddy energy dissipation time‐scale |
author_facet |
Mak, J Marshall, DP Madec, G Maddision, JR |
author_sort |
Mak, J |
title |
Acute sensitivity of global ocean circulation and heat content to eddy energy dissipation time‐scale |
title_short |
Acute sensitivity of global ocean circulation and heat content to eddy energy dissipation time‐scale |
title_full |
Acute sensitivity of global ocean circulation and heat content to eddy energy dissipation time‐scale |
title_fullStr |
Acute sensitivity of global ocean circulation and heat content to eddy energy dissipation time‐scale |
title_full_unstemmed |
Acute sensitivity of global ocean circulation and heat content to eddy energy dissipation time‐scale |
title_sort |
acute sensitivity of global ocean circulation and heat content to eddy energy dissipation time‐scale |
publisher |
Wiley |
publishDate |
2022 |
url |
https://doi.org/10.1029/2021gl097259 https://ora.ox.ac.uk/objects/uuid:3a0a8cbe-02e5-4d04-9e86-c1d0170175b9 |
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_relation |
doi:10.1029/2021gl097259 https://ora.ox.ac.uk/objects/uuid:3a0a8cbe-02e5-4d04-9e86-c1d0170175b9 https://doi.org/10.1029/2021gl097259 |
op_rights |
info:eu-repo/semantics/openAccess CC Attribution (CC BY) |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2021gl097259 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
8 |
_version_ |
1766269463309582336 |