Stationary Rossby waves dominate subduction of anthropogenic carbon in the Southern Ocean
The Southern Ocean has taken up more than 40% of the total anthropogenic carbon (Cant) stored in the oceans since the preindustrial era, mainly in subantarctic mode and intermediate waters (SAMW-AAIW). However, the physical mechanisms responsible for the transfer of Cant into the ocean interior rema...
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ftunivtasmania:oai:eprints.utas.edu.au:26778 2023-05-15T13:31:53+02:00 Stationary Rossby waves dominate subduction of anthropogenic carbon in the Southern Ocean Langlais, CE Lenton, AA Matear, R Monselesan, D Legresy, B Cougnon, E Rintoul, S 2017 application/pdf https://eprints.utas.edu.au/26778/ https://eprints.utas.edu.au/26778/1/Langlais_etal_2017_SREPsubduction_final.pdf https://doi.org/10.1038/s41598-017-17292-3 en eng Nature Publishing Group https://eprints.utas.edu.au/26778/1/Langlais_etal_2017_SREPsubduction_final.pdf Langlais, CE, Lenton, AA, Matear, R, Monselesan, D, Legresy, B orcid:0000-0002-1909-1630 , Cougnon, E orcid:0000-0002-8691-5935 and Rintoul, S orcid:0000-0002-7055-9876 2017 , 'Stationary Rossby waves dominate subduction of anthropogenic carbon in the Southern Ocean' , Scientific Reports, vol. 7 , pp. 1-10 , doi:10.1038/s41598-017-17292-3 <http://dx.doi.org/10.1038/s41598-017-17292-3>. biological physics carbon cycle marine chemistry physical oceanography Article PeerReviewed 2017 ftunivtasmania https://doi.org/10.1038/s41598-017-17292-3 2021-09-13T22:17:41Z The Southern Ocean has taken up more than 40% of the total anthropogenic carbon (Cant) stored in the oceans since the preindustrial era, mainly in subantarctic mode and intermediate waters (SAMW-AAIW). However, the physical mechanisms responsible for the transfer of Cant into the ocean interior remain poorly understood. Here, we use high resolution (1/10°) ocean simulations to investigate these mechanisms at the SAMW-AAIW subduction hotspots. Mesoscale Stationary Rossby Waves (SRWs), generated where the Antarctic Circumpolar Current interacts with topography, make the dominant contribution to the Cant transfer in SAMW-AAIW in the Indian and Pacific sectors (66% and 95% respectively). Eddy-resolving simulations reproduce the observed Cant sequestration in these layers, while lower spatial resolution models, that do not reproduce SRWs, underestimate the inventory of Cant in these layers by 40% and overestimate the storage in denser layers. A key implication is that climate model simulations, that lack sufficient resolution to represent sequestration by SRWs, are therefore likely to overestimate the residence time of Cant in the ocean, with implications for simulated rates of climate change. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean The Antarctic Pacific Indian Scientific Reports 7 1 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
biological physics carbon cycle marine chemistry physical oceanography |
spellingShingle |
biological physics carbon cycle marine chemistry physical oceanography Langlais, CE Lenton, AA Matear, R Monselesan, D Legresy, B Cougnon, E Rintoul, S Stationary Rossby waves dominate subduction of anthropogenic carbon in the Southern Ocean |
topic_facet |
biological physics carbon cycle marine chemistry physical oceanography |
description |
The Southern Ocean has taken up more than 40% of the total anthropogenic carbon (Cant) stored in the oceans since the preindustrial era, mainly in subantarctic mode and intermediate waters (SAMW-AAIW). However, the physical mechanisms responsible for the transfer of Cant into the ocean interior remain poorly understood. Here, we use high resolution (1/10°) ocean simulations to investigate these mechanisms at the SAMW-AAIW subduction hotspots. Mesoscale Stationary Rossby Waves (SRWs), generated where the Antarctic Circumpolar Current interacts with topography, make the dominant contribution to the Cant transfer in SAMW-AAIW in the Indian and Pacific sectors (66% and 95% respectively). Eddy-resolving simulations reproduce the observed Cant sequestration in these layers, while lower spatial resolution models, that do not reproduce SRWs, underestimate the inventory of Cant in these layers by 40% and overestimate the storage in denser layers. A key implication is that climate model simulations, that lack sufficient resolution to represent sequestration by SRWs, are therefore likely to overestimate the residence time of Cant in the ocean, with implications for simulated rates of climate change. |
format |
Article in Journal/Newspaper |
author |
Langlais, CE Lenton, AA Matear, R Monselesan, D Legresy, B Cougnon, E Rintoul, S |
author_facet |
Langlais, CE Lenton, AA Matear, R Monselesan, D Legresy, B Cougnon, E Rintoul, S |
author_sort |
Langlais, CE |
title |
Stationary Rossby waves dominate subduction of anthropogenic carbon in the Southern Ocean |
title_short |
Stationary Rossby waves dominate subduction of anthropogenic carbon in the Southern Ocean |
title_full |
Stationary Rossby waves dominate subduction of anthropogenic carbon in the Southern Ocean |
title_fullStr |
Stationary Rossby waves dominate subduction of anthropogenic carbon in the Southern Ocean |
title_full_unstemmed |
Stationary Rossby waves dominate subduction of anthropogenic carbon in the Southern Ocean |
title_sort |
stationary rossby waves dominate subduction of anthropogenic carbon in the southern ocean |
publisher |
Nature Publishing Group |
publishDate |
2017 |
url |
https://eprints.utas.edu.au/26778/ https://eprints.utas.edu.au/26778/1/Langlais_etal_2017_SREPsubduction_final.pdf https://doi.org/10.1038/s41598-017-17292-3 |
geographic |
Antarctic Southern Ocean The Antarctic Pacific Indian |
geographic_facet |
Antarctic Southern Ocean The Antarctic Pacific Indian |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://eprints.utas.edu.au/26778/1/Langlais_etal_2017_SREPsubduction_final.pdf Langlais, CE, Lenton, AA, Matear, R, Monselesan, D, Legresy, B orcid:0000-0002-1909-1630 , Cougnon, E orcid:0000-0002-8691-5935 and Rintoul, S orcid:0000-0002-7055-9876 2017 , 'Stationary Rossby waves dominate subduction of anthropogenic carbon in the Southern Ocean' , Scientific Reports, vol. 7 , pp. 1-10 , doi:10.1038/s41598-017-17292-3 <http://dx.doi.org/10.1038/s41598-017-17292-3>. |
op_doi |
https://doi.org/10.1038/s41598-017-17292-3 |
container_title |
Scientific Reports |
container_volume |
7 |
container_issue |
1 |
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1766021804278677504 |