Water masses as a unifying framework for understanding the Southern Ocean Carbon Cycle
The scientific motivation for this study is to understand the processes in the ocean interior controlling carbon transfer across 30S. To address this, we have developed a unified framework for understanding the interplay between physical drivers such as buoyancy fluxes and ocean mixing, and carbon-s...
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ftunivnapoliiris:oai:www.iris.unina.it:11588/377639 2024-04-21T07:52:07+00:00 Water masses as a unifying framework for understanding the Southern Ocean Carbon Cycle D. Iudicone I. Stendardo O. Aumont K. B. Rodgers G. Madec L. Bopp M. Ribera D'Alcalà MANGONI, OLGA D., Iudicone I., Stendardo O., Aumont K. B., Rodger G., Madec L., Bopp Mangoni, Olga M., Ribera D'Alcalà 2011 STAMPA http://hdl.handle.net/11588/377639 https://doi.org/10.5194/bg-8-1031-2011 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000291003200001 volume:8 firstpage:1031 lastpage:1052 numberofpages:21 journal:BIOGEOSCIENCES http://hdl.handle.net/11588/377639 doi:10.5194/bg-8-1031-2011 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79955786720 info:eu-repo/semantics/closedAccess info:eu-repo/semantics/article 2011 ftunivnapoliiris https://doi.org/10.5194/bg-8-1031-2011 2024-03-28T02:01:35Z The scientific motivation for this study is to understand the processes in the ocean interior controlling carbon transfer across 30S. To address this, we have developed a unified framework for understanding the interplay between physical drivers such as buoyancy fluxes and ocean mixing, and carbon-specific processes such as biology, gas exchange and carbon mixing. Given the importance of density in determining the ocean interior structure and circulation, the framework is one that is organized by density and water masses, and it makes combined use of Eulerian and Lagrangian diagnostics. This is achieved through application to a global ice-ocean circulation model and an ocean biogeochemistry model, with both components being part of the widely-used IPSL coupled ocean/atmosphere/carbon cycle model. Our main new result is the dominance of the overturning circulation (identified by water masses) in setting the vertical distribution of carbon transport from the Southern Ocean towards the global ocean. A net contrast emerges between the role of Subantarctic Mode Water (SAMW), associated with large northward transport and ingassing, and Antarctic IntermediateWater (AAIW), associated with a much smaller export and outgassing. The differences in their export rate reflects differences in their water mass formation processes. For SAMW, two-thirds of the surface waters are provided as a result of the densification of thermocline water (TW), and upon densification this water carries with it a substantial diapycnal flux of dissolved inorganic carbon (DIC). For AAIW, principal formatin processes include buoyancy forcing and mixing, with these serving to lighten CDW. An additional important formation pathway of AAIW is through the effect of interior processing (mixing, including cabelling) that serve to densify SAMW. A quantitative evaluation of the contribution of mixing, biology and gas exchange to the DIC evolution per water mass reveals that mixing and, secondarily, gas exchange, effectively nearly balance biology on annual ... Article in Journal/Newspaper Antarc* Antarctic Southern Ocean IRIS Università degli Studi di Napoli Federico II Biogeosciences 8 5 1031 1052 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Napoli Federico II |
op_collection_id |
ftunivnapoliiris |
language |
English |
description |
The scientific motivation for this study is to understand the processes in the ocean interior controlling carbon transfer across 30S. To address this, we have developed a unified framework for understanding the interplay between physical drivers such as buoyancy fluxes and ocean mixing, and carbon-specific processes such as biology, gas exchange and carbon mixing. Given the importance of density in determining the ocean interior structure and circulation, the framework is one that is organized by density and water masses, and it makes combined use of Eulerian and Lagrangian diagnostics. This is achieved through application to a global ice-ocean circulation model and an ocean biogeochemistry model, with both components being part of the widely-used IPSL coupled ocean/atmosphere/carbon cycle model. Our main new result is the dominance of the overturning circulation (identified by water masses) in setting the vertical distribution of carbon transport from the Southern Ocean towards the global ocean. A net contrast emerges between the role of Subantarctic Mode Water (SAMW), associated with large northward transport and ingassing, and Antarctic IntermediateWater (AAIW), associated with a much smaller export and outgassing. The differences in their export rate reflects differences in their water mass formation processes. For SAMW, two-thirds of the surface waters are provided as a result of the densification of thermocline water (TW), and upon densification this water carries with it a substantial diapycnal flux of dissolved inorganic carbon (DIC). For AAIW, principal formatin processes include buoyancy forcing and mixing, with these serving to lighten CDW. An additional important formation pathway of AAIW is through the effect of interior processing (mixing, including cabelling) that serve to densify SAMW. A quantitative evaluation of the contribution of mixing, biology and gas exchange to the DIC evolution per water mass reveals that mixing and, secondarily, gas exchange, effectively nearly balance biology on annual ... |
author2 |
D., Iudicone I., Stendardo O., Aumont K. B., Rodger G., Madec L., Bopp Mangoni, Olga M., Ribera D'Alcalà |
format |
Article in Journal/Newspaper |
author |
D. Iudicone I. Stendardo O. Aumont K. B. Rodgers G. Madec L. Bopp M. Ribera D'Alcalà MANGONI, OLGA |
spellingShingle |
D. Iudicone I. Stendardo O. Aumont K. B. Rodgers G. Madec L. Bopp M. Ribera D'Alcalà MANGONI, OLGA Water masses as a unifying framework for understanding the Southern Ocean Carbon Cycle |
author_facet |
D. Iudicone I. Stendardo O. Aumont K. B. Rodgers G. Madec L. Bopp M. Ribera D'Alcalà MANGONI, OLGA |
author_sort |
D. Iudicone |
title |
Water masses as a unifying framework for understanding the Southern Ocean Carbon Cycle |
title_short |
Water masses as a unifying framework for understanding the Southern Ocean Carbon Cycle |
title_full |
Water masses as a unifying framework for understanding the Southern Ocean Carbon Cycle |
title_fullStr |
Water masses as a unifying framework for understanding the Southern Ocean Carbon Cycle |
title_full_unstemmed |
Water masses as a unifying framework for understanding the Southern Ocean Carbon Cycle |
title_sort |
water masses as a unifying framework for understanding the southern ocean carbon cycle |
publishDate |
2011 |
url |
http://hdl.handle.net/11588/377639 https://doi.org/10.5194/bg-8-1031-2011 |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000291003200001 volume:8 firstpage:1031 lastpage:1052 numberofpages:21 journal:BIOGEOSCIENCES http://hdl.handle.net/11588/377639 doi:10.5194/bg-8-1031-2011 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79955786720 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.5194/bg-8-1031-2011 |
container_title |
Biogeosciences |
container_volume |
8 |
container_issue |
5 |
container_start_page |
1031 |
op_container_end_page |
1052 |
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1796935377601167360 |