The impact of Southern Ocean residual upwelling on atmospheric CO[subscript 2] 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 CO[subscript 2] changes in terms of changes in wind forci...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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Springer Berlin Heidelberg
2017
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| Online Access: | http://hdl.handle.net/1721.1/107158 https://orcid.org/0000-0002-2993-7484 |
| _version_ | 1811080941857144832 |
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| author | Williams, Richard G. Munday, David R. Marshall, David P. Lauderdale, Jonathan |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Williams, Richard G. Munday, David R. Marshall, David P. Lauderdale, Jonathan |
| author_sort | Williams, Richard G. |
| collection | MIT |
| 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 CO[subscript 2] 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 CO[subscript 2] 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 CO[subscript 2] 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 CO[subscript 2] at a rate of typically 1–1.5 parts per million/10[superscript 6] m[superscript 3] s[superscript −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 CO[subscript 2], alongside other metrics, such as involving the proportion of preformed nutrients and the extent of sea ice cover. |
| first_indexed | 2024-09-23T11:39:17Z |
| format | Article |
| id | mit-1721.1/107158 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:39:17Z |
| publishDate | 2017 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1071582022-09-27T21:02:49Z The impact of Southern Ocean residual upwelling on atmospheric CO[subscript 2] on centennial and millennial timescales The impact of Southern Ocean residual upwelling on atmospheric CO2 on centennial and millennial timescales Williams, Richard G. Munday, David R. Marshall, David P. Lauderdale, Jonathan Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Lauderdale, Jonathan 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 CO[subscript 2] 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 CO[subscript 2] 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 CO[subscript 2] 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 CO[subscript 2] at a rate of typically 1–1.5 parts per million/10[superscript 6] m[superscript 3] s[superscript −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 CO[subscript 2], alongside other metrics, such as involving the proportion of preformed nutrients and the extent of sea ice cover. National Science Foundation (U.S.) (Chemical Oceanography Grant 1259388) Natural Environment Research Council (Great Britain) (Grants NE/K012789/10 and NE/G018782/1) 2017-02-24T22:41:25Z 2017-02-24T22:41:25Z 2016-05 2016-01 2016-05-23T09:36:16Z Article http://purl.org/eprint/type/JournalArticle 0930-7575 1432-0894 http://hdl.handle.net/1721.1/107158 Lauderdale, Jonathan M., Richard G. Williams, David R. Munday, and David P. Marshall. “The Impact of Southern Ocean Residual Upwelling on Atmospheric CO2 on Centennial and Millennial Timescales.” Climate Dynamics (May 10, https://orcid.org/0000-0002-2993-7484 en http://dx.doi.org/10.1007/s00382-016-3163-y Climate Dynamics Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Williams, Richard G. Munday, David R. Marshall, David P. Lauderdale, Jonathan The impact of Southern Ocean residual upwelling on atmospheric CO[subscript 2] on centennial and millennial timescales |
| title | The impact of Southern Ocean residual upwelling on atmospheric CO[subscript 2] on centennial and millennial timescales |
| title_full | The impact of Southern Ocean residual upwelling on atmospheric CO[subscript 2] on centennial and millennial timescales |
| title_fullStr | The impact of Southern Ocean residual upwelling on atmospheric CO[subscript 2] on centennial and millennial timescales |
| title_full_unstemmed | The impact of Southern Ocean residual upwelling on atmospheric CO[subscript 2] on centennial and millennial timescales |
| title_short | The impact of Southern Ocean residual upwelling on atmospheric CO[subscript 2] on centennial and millennial timescales |
| title_sort | impact of southern ocean residual upwelling on atmospheric co subscript 2 on centennial and millennial timescales |
| url | http://hdl.handle.net/1721.1/107158 https://orcid.org/0000-0002-2993-7484 |
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