Data from: Isopycnal mixing suppression by the Antarctic Circumpolar Current and the Southern Ocean Meridional Overturning Circulation
The Meridional Overturning Circulation (MOC) in the Southern Ocean is investigated using hydrographic observations combined with satellite measurements of sea-surface height. A three-dimensional (spatial and vertical) estimate of the isopycnal eddy-diffusivity in the Southern Ocean is obtained using...
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ftdans:oai:easy.dans.knaw.nl:easy-dataset:98219 2023-07-02T03:30:14+02:00 Data from: Isopycnal mixing suppression by the Antarctic Circumpolar Current and the Southern Ocean Meridional Overturning Circulation Chapman, Christopher Sallée, Jean-Baptiste 2017-07-14T22:01:04.000+02:00 http://nbn-resolving.org/urn:nbn:nl:ui:13-iz-02kr https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:98219 unknown doi:10.5061/dryad.55bp8/1 doi:10.5061/dryad.55bp8/2 doi:10.5061/dryad.55bp8/3 doi:10.5061/dryad.55bp8/4 doi:10.5061/dryad.55bp8/5 doi:10.5061/dryad.55bp8/6 doi:10.5061/dryad.55bp8/7 doi:10.5061/dryad.55bp8/8 doi:10.5061/dryad.55bp8/9 doi:10.5061/dryad.55bp8/11 doi:10.5061/dryad.55bp8/12 doi:10.5061/dryad.55bp8/13 doi:10.5061/dryad.55bp8/14 doi:10.5061/dryad.55bp8/15 doi:10.5061/dryad.55bp8/16 doi:10.5061/dryad.55bp8/17 doi:10.5061/dryad.55bp8/18 doi:10.5061/dryad.55bp8/19 doi:10.5061/dryad.55bp8/21 doi:10.5061/dryad.55bp8/22 doi:10.5061/dryad.55bp8/23 doi:10.5061/dryad.55bp8/24 doi:10.5061/dryad.55bp8/25 doi:10.5061/dryad.55bp8/26 doi:10.5061/dryad.55bp8/27 doi:10.5061/dryad.55bp8/28 doi:10.5061/dryad.55bp8/30 doi:10.5061/dryad.55bp8/31 doi:10.5061/dryad.55bp8/32 doi:10.5061/dryad.55bp8/33 doi:10.5061/dryad.55bp8/34 doi:10.5061/dryad.55bp8/35 doi:10.5061/dryad.55bp8/36 doi:10.5061/dryad.55bp8/37 doi:10.5061/dryad.55bp8/38 doi:10.5061/dryad.55bp8/40 doi:10.1175/JPO-D-16-0263.1 http://nbn-resolving.org/urn:nbn:nl:ui:13-iz-02kr doi:10.5061/dryad.55bp8 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:98219 OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf Life sciences medicine and health care 2017 ftdans https://doi.org/10.5061/dryad.55bp8/110.5061/dryad.55bp8/210.5061/dryad.55bp8/310.5061/dryad.55bp8/410.5061/dryad.55bp8/510.5061/dryad.55bp8/610.5061/dryad.55bp8/710.5061/dryad.55bp8/810.5061/dryad.55bp8/910.5061/dryad.55bp8/1110.5061/dryad.55bp8/1210.506 2023-06-13T12:43:22Z The Meridional Overturning Circulation (MOC) in the Southern Ocean is investigated using hydrographic observations combined with satellite measurements of sea-surface height. A three-dimensional (spatial and vertical) estimate of the isopycnal eddy-diffusivity in the Southern Ocean is obtained using the theory of Ferrari & Nikurashin (2010), that includes the influence of suppression of the diffusivity by the strong, time-mean flows. It is found that the eddy diffusivity is enhanced at depth, reaching a maximum at the “critical layer” near 1000m. The estimate of diffusivity is used with a simple diffusive parameterization to estimate the meridional eddy volume flux. Together with an estimate of the meridional Ekman transport and the eddy volume flux is used to reconstruct the time-mean overturning circulation. By comparing the reconstruction with, and without, suppression of the eddy diffusivity by the mean flow, the influence of the suppression on the overturning is illuminated. It is shown that the suppression of the eddy diffusivity results in a large reduction of interior eddy transports, and a more realistic eddy induced overturning circulation. Finally, a simple conceptual model is used to show that the MOC is influenced not only by the existence of enhanced diffusivity at depth, but also by the details of the vertical structure of the eddy diffusivity, such as the depth of the critical layer. Other/Unknown Material Antarc* Antarctic Southern Ocean Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) Antarctic Southern Ocean The Antarctic |
institution |
Open Polar |
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Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
op_collection_id |
ftdans |
language |
unknown |
topic |
Life sciences medicine and health care |
spellingShingle |
Life sciences medicine and health care Chapman, Christopher Sallée, Jean-Baptiste Data from: Isopycnal mixing suppression by the Antarctic Circumpolar Current and the Southern Ocean Meridional Overturning Circulation |
topic_facet |
Life sciences medicine and health care |
description |
The Meridional Overturning Circulation (MOC) in the Southern Ocean is investigated using hydrographic observations combined with satellite measurements of sea-surface height. A three-dimensional (spatial and vertical) estimate of the isopycnal eddy-diffusivity in the Southern Ocean is obtained using the theory of Ferrari & Nikurashin (2010), that includes the influence of suppression of the diffusivity by the strong, time-mean flows. It is found that the eddy diffusivity is enhanced at depth, reaching a maximum at the “critical layer” near 1000m. The estimate of diffusivity is used with a simple diffusive parameterization to estimate the meridional eddy volume flux. Together with an estimate of the meridional Ekman transport and the eddy volume flux is used to reconstruct the time-mean overturning circulation. By comparing the reconstruction with, and without, suppression of the eddy diffusivity by the mean flow, the influence of the suppression on the overturning is illuminated. It is shown that the suppression of the eddy diffusivity results in a large reduction of interior eddy transports, and a more realistic eddy induced overturning circulation. Finally, a simple conceptual model is used to show that the MOC is influenced not only by the existence of enhanced diffusivity at depth, but also by the details of the vertical structure of the eddy diffusivity, such as the depth of the critical layer. |
author |
Chapman, Christopher Sallée, Jean-Baptiste |
author_facet |
Chapman, Christopher Sallée, Jean-Baptiste |
author_sort |
Chapman, Christopher |
title |
Data from: Isopycnal mixing suppression by the Antarctic Circumpolar Current and the Southern Ocean Meridional Overturning Circulation |
title_short |
Data from: Isopycnal mixing suppression by the Antarctic Circumpolar Current and the Southern Ocean Meridional Overturning Circulation |
title_full |
Data from: Isopycnal mixing suppression by the Antarctic Circumpolar Current and the Southern Ocean Meridional Overturning Circulation |
title_fullStr |
Data from: Isopycnal mixing suppression by the Antarctic Circumpolar Current and the Southern Ocean Meridional Overturning Circulation |
title_full_unstemmed |
Data from: Isopycnal mixing suppression by the Antarctic Circumpolar Current and the Southern Ocean Meridional Overturning Circulation |
title_sort |
data from: isopycnal mixing suppression by the antarctic circumpolar current and the southern ocean meridional overturning circulation |
publishDate |
2017 |
url |
http://nbn-resolving.org/urn:nbn:nl:ui:13-iz-02kr https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:98219 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
doi:10.5061/dryad.55bp8/1 doi:10.5061/dryad.55bp8/2 doi:10.5061/dryad.55bp8/3 doi:10.5061/dryad.55bp8/4 doi:10.5061/dryad.55bp8/5 doi:10.5061/dryad.55bp8/6 doi:10.5061/dryad.55bp8/7 doi:10.5061/dryad.55bp8/8 doi:10.5061/dryad.55bp8/9 doi:10.5061/dryad.55bp8/11 doi:10.5061/dryad.55bp8/12 doi:10.5061/dryad.55bp8/13 doi:10.5061/dryad.55bp8/14 doi:10.5061/dryad.55bp8/15 doi:10.5061/dryad.55bp8/16 doi:10.5061/dryad.55bp8/17 doi:10.5061/dryad.55bp8/18 doi:10.5061/dryad.55bp8/19 doi:10.5061/dryad.55bp8/21 doi:10.5061/dryad.55bp8/22 doi:10.5061/dryad.55bp8/23 doi:10.5061/dryad.55bp8/24 doi:10.5061/dryad.55bp8/25 doi:10.5061/dryad.55bp8/26 doi:10.5061/dryad.55bp8/27 doi:10.5061/dryad.55bp8/28 doi:10.5061/dryad.55bp8/30 doi:10.5061/dryad.55bp8/31 doi:10.5061/dryad.55bp8/32 doi:10.5061/dryad.55bp8/33 doi:10.5061/dryad.55bp8/34 doi:10.5061/dryad.55bp8/35 doi:10.5061/dryad.55bp8/36 doi:10.5061/dryad.55bp8/37 doi:10.5061/dryad.55bp8/38 doi:10.5061/dryad.55bp8/40 doi:10.1175/JPO-D-16-0263.1 http://nbn-resolving.org/urn:nbn:nl:ui:13-iz-02kr doi:10.5061/dryad.55bp8 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:98219 |
op_rights |
OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf |
op_doi |
https://doi.org/10.5061/dryad.55bp8/110.5061/dryad.55bp8/210.5061/dryad.55bp8/310.5061/dryad.55bp8/410.5061/dryad.55bp8/510.5061/dryad.55bp8/610.5061/dryad.55bp8/710.5061/dryad.55bp8/810.5061/dryad.55bp8/910.5061/dryad.55bp8/1110.5061/dryad.55bp8/1210.506 |
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1770274468271226880 |