Submesoscale contribution to subduction: Tracer and momentum fluxes
Abstract An important component of the carbon‐cycle is subduction, for example of dissolved carbon, from the surface layers to depths of ( 102– 103)m. Recently, attention has been focused on the contribution by small‐scale, mesoscale M, and submesoscale SM eddies. In the Southern Ocean, the M contri...
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ftdoajarticles:oai:doaj.org/article:20c061fb1b394ec09416b157e3c1c85c 2023-10-01T03:59:37+02:00 Submesoscale contribution to subduction: Tracer and momentum fluxes V. M. Canuto 2017-03-01T00:00:00Z https://doi.org/10.1002/2016MS000768 https://doaj.org/article/20c061fb1b394ec09416b157e3c1c85c EN eng American Geophysical Union (AGU) https://doi.org/10.1002/2016MS000768 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1002/2016MS000768 https://doaj.org/article/20c061fb1b394ec09416b157e3c1c85c Journal of Advances in Modeling Earth Systems, Vol 9, Iss 1, Pp 609-615 (2017) sub‐mesoscales subduction Physical geography GB3-5030 Oceanography GC1-1581 article 2017 ftdoajarticles https://doi.org/10.1002/2016MS000768 2023-09-03T00:54:18Z Abstract An important component of the carbon‐cycle is subduction, for example of dissolved carbon, from the surface layers to depths of ( 102– 103)m. Recently, attention has been focused on the contribution by small‐scale, mesoscale M, and submesoscale SM eddies. In the Southern Ocean, the M contribution to subduction was found to be negative and of an order of magnitude smaller than the positive one by vertical diffusion. Since there is now observational evidence that SM export organic carbon but they have not yet been included in subduction studies, the goal of this work is to derive the following results needed to carry out such studies: (a) OGCMs used in C‐cycle studies solve the equations for the mean temperature, mean salinity, and mean concentration. We derive the forms of the 3‐D arbitrary tracer fluxes in terms of resolved fields. (b) The same OGCMs also solve the mean momentum equation. We derive the form of the SM momentum fluxes (Reynolds Stresses) also in terms of resolved fields. (c) It is shown that whether there is subduction or obduction depends on the ratio h/H, where h is depth of the SM regime and H is the mixed‐layer depth. We show that in the ACC the ratio depends on the specific location and that both subduction and obduction occur but with a topology different than that of mesoscales. Article in Journal/Newspaper Southern Ocean Directory of Open Access Journals: DOAJ Articles Southern Ocean Journal of Advances in Modeling Earth Systems 9 1 609 615 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
sub‐mesoscales subduction Physical geography GB3-5030 Oceanography GC1-1581 |
spellingShingle |
sub‐mesoscales subduction Physical geography GB3-5030 Oceanography GC1-1581 V. M. Canuto Submesoscale contribution to subduction: Tracer and momentum fluxes |
topic_facet |
sub‐mesoscales subduction Physical geography GB3-5030 Oceanography GC1-1581 |
description |
Abstract An important component of the carbon‐cycle is subduction, for example of dissolved carbon, from the surface layers to depths of ( 102– 103)m. Recently, attention has been focused on the contribution by small‐scale, mesoscale M, and submesoscale SM eddies. In the Southern Ocean, the M contribution to subduction was found to be negative and of an order of magnitude smaller than the positive one by vertical diffusion. Since there is now observational evidence that SM export organic carbon but they have not yet been included in subduction studies, the goal of this work is to derive the following results needed to carry out such studies: (a) OGCMs used in C‐cycle studies solve the equations for the mean temperature, mean salinity, and mean concentration. We derive the forms of the 3‐D arbitrary tracer fluxes in terms of resolved fields. (b) The same OGCMs also solve the mean momentum equation. We derive the form of the SM momentum fluxes (Reynolds Stresses) also in terms of resolved fields. (c) It is shown that whether there is subduction or obduction depends on the ratio h/H, where h is depth of the SM regime and H is the mixed‐layer depth. We show that in the ACC the ratio depends on the specific location and that both subduction and obduction occur but with a topology different than that of mesoscales. |
format |
Article in Journal/Newspaper |
author |
V. M. Canuto |
author_facet |
V. M. Canuto |
author_sort |
V. M. Canuto |
title |
Submesoscale contribution to subduction: Tracer and momentum fluxes |
title_short |
Submesoscale contribution to subduction: Tracer and momentum fluxes |
title_full |
Submesoscale contribution to subduction: Tracer and momentum fluxes |
title_fullStr |
Submesoscale contribution to subduction: Tracer and momentum fluxes |
title_full_unstemmed |
Submesoscale contribution to subduction: Tracer and momentum fluxes |
title_sort |
submesoscale contribution to subduction: tracer and momentum fluxes |
publisher |
American Geophysical Union (AGU) |
publishDate |
2017 |
url |
https://doi.org/10.1002/2016MS000768 https://doaj.org/article/20c061fb1b394ec09416b157e3c1c85c |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Journal of Advances in Modeling Earth Systems, Vol 9, Iss 1, Pp 609-615 (2017) |
op_relation |
https://doi.org/10.1002/2016MS000768 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1002/2016MS000768 https://doaj.org/article/20c061fb1b394ec09416b157e3c1c85c |
op_doi |
https://doi.org/10.1002/2016MS000768 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
9 |
container_issue |
1 |
container_start_page |
609 |
op_container_end_page |
615 |
_version_ |
1778533861737627648 |