The impact of Southern Ocean residual upwelling on atmospheric CO2 on centennial and millennial timescales
The Southern Ocean plays a pivotal role in climate change by exchanging heat and carbon, and provides the primary window for the global deep ocean to communicate with the atmosphere. There has been a widespread focus on explaining atmospheric CO2 changes in terms of changes in wind forcing in the So...
Published in: | Climate Dynamics |
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Springer Verlag
2016
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Online Access: | https://doi.org/10.1007/s00382-016-3163-y https://ora.ox.ac.uk/objects/uuid:c1e7c7f1-546b-4a9d-bc0d-1ca6bad9e58c |
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ftuloxford:oai:ora.ox.ac.uk:uuid:c1e7c7f1-546b-4a9d-bc0d-1ca6bad9e58c 2023-05-15T18:18:33+02:00 The impact of Southern Ocean residual upwelling on atmospheric CO2 on centennial and millennial timescales Lauderdale, J Williams, R Munday, D Marshall, D 2016-07-29 https://doi.org/10.1007/s00382-016-3163-y https://ora.ox.ac.uk/objects/uuid:c1e7c7f1-546b-4a9d-bc0d-1ca6bad9e58c unknown Springer Verlag doi:10.1007/s00382-016-3163-y https://ora.ox.ac.uk/objects/uuid:c1e7c7f1-546b-4a9d-bc0d-1ca6bad9e58c https://doi.org/10.1007/s00382-016-3163-y info:eu-repo/semantics/openAccess CC Attribution (CC BY) CC-BY Journal article 2016 ftuloxford https://doi.org/10.1007/s00382-016-3163-y 2022-06-28T20:23:05Z The Southern Ocean plays a pivotal role in climate change by exchanging heat and carbon, and provides the primary window for the global deep ocean to communicate with the atmosphere. There has been a widespread focus on explaining atmospheric CO2 changes in terms of changes in wind forcing in the Southern Ocean. Here, we develop a dynamically-motivated metric, the residual upwelling, that measures the primary effect of Southern Ocean dynamics on atmospheric CO2 on centennial to millennial timescales by determining the communication with the deep ocean. The metric encapsulates the combined, net effect of winds and air–sea buoyancy forcing on both the upper and lower overturning cells, which have been invoked as explaining atmospheric CO2 changes for the present day and glacial-interglacial changes. The skill of the metric is assessed by employing suites of idealized ocean model experiments, including parameterized and explicitly simulated eddies, with online biogeochemistry and integrated for 10,000 years to equilibrium. Increased residual upwelling drives elevated atmospheric CO2 at a rate of typically 1–1.5 parts per million/106 m3 s−1 by enhancing the communication between the atmosphere and deep ocean. This metric can be used to interpret the long-term effect of Southern Ocean dynamics on the natural carbon cycle and atmospheric CO2, alongside other metrics, such as involving the proportion of preformed nutrients and the extent of sea ice cover. Article in Journal/Newspaper Sea ice Southern Ocean ORA - Oxford University Research Archive Southern Ocean Climate Dynamics 48 5-6 1611 1631 |
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Open Polar |
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ORA - Oxford University Research Archive |
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ftuloxford |
language |
unknown |
description |
The Southern Ocean plays a pivotal role in climate change by exchanging heat and carbon, and provides the primary window for the global deep ocean to communicate with the atmosphere. There has been a widespread focus on explaining atmospheric CO2 changes in terms of changes in wind forcing in the Southern Ocean. Here, we develop a dynamically-motivated metric, the residual upwelling, that measures the primary effect of Southern Ocean dynamics on atmospheric CO2 on centennial to millennial timescales by determining the communication with the deep ocean. The metric encapsulates the combined, net effect of winds and air–sea buoyancy forcing on both the upper and lower overturning cells, which have been invoked as explaining atmospheric CO2 changes for the present day and glacial-interglacial changes. The skill of the metric is assessed by employing suites of idealized ocean model experiments, including parameterized and explicitly simulated eddies, with online biogeochemistry and integrated for 10,000 years to equilibrium. Increased residual upwelling drives elevated atmospheric CO2 at a rate of typically 1–1.5 parts per million/106 m3 s−1 by enhancing the communication between the atmosphere and deep ocean. This metric can be used to interpret the long-term effect of Southern Ocean dynamics on the natural carbon cycle and atmospheric CO2, alongside other metrics, such as involving the proportion of preformed nutrients and the extent of sea ice cover. |
format |
Article in Journal/Newspaper |
author |
Lauderdale, J Williams, R Munday, D Marshall, D |
spellingShingle |
Lauderdale, J Williams, R Munday, D Marshall, D The impact of Southern Ocean residual upwelling on atmospheric CO2 on centennial and millennial timescales |
author_facet |
Lauderdale, J Williams, R Munday, D Marshall, D |
author_sort |
Lauderdale, J |
title |
The impact of Southern Ocean residual upwelling on atmospheric CO2 on centennial and millennial timescales |
title_short |
The impact of Southern Ocean residual upwelling on atmospheric CO2 on centennial and millennial timescales |
title_full |
The impact of Southern Ocean residual upwelling on atmospheric CO2 on centennial and millennial timescales |
title_fullStr |
The impact of Southern Ocean residual upwelling on atmospheric CO2 on centennial and millennial timescales |
title_full_unstemmed |
The impact of Southern Ocean residual upwelling on atmospheric CO2 on centennial and millennial timescales |
title_sort |
impact of southern ocean residual upwelling on atmospheric co2 on centennial and millennial timescales |
publisher |
Springer Verlag |
publishDate |
2016 |
url |
https://doi.org/10.1007/s00382-016-3163-y https://ora.ox.ac.uk/objects/uuid:c1e7c7f1-546b-4a9d-bc0d-1ca6bad9e58c |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_relation |
doi:10.1007/s00382-016-3163-y https://ora.ox.ac.uk/objects/uuid:c1e7c7f1-546b-4a9d-bc0d-1ca6bad9e58c https://doi.org/10.1007/s00382-016-3163-y |
op_rights |
info:eu-repo/semantics/openAccess CC Attribution (CC BY) |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00382-016-3163-y |
container_title |
Climate Dynamics |
container_volume |
48 |
container_issue |
5-6 |
container_start_page |
1611 |
op_container_end_page |
1631 |
_version_ |
1766195167872679936 |