Labrador Sea convection and subpolar North Atlantic Deep Water export in the SODA assimilation model
Labrador Sea convection was most intense and reached the greatest depths in the early 1990s, followed by weaker, shallower, and more variable convection after 1995. The Simple Ocean Data Assimilation (SODA) version 2.0.2/2.0.4 assimilation model is used to explore convective activity in the North At...
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ftoceanrep:oai:oceanrep.geomar.de:3244 2023-05-15T17:06:00+02:00 Labrador Sea convection and subpolar North Atlantic Deep Water export in the SODA assimilation model Schott, Friedrich Stramma, Lothar Giese, B. S. Zantopp, Rainer J. 2009-06 text https://oceanrep.geomar.de/id/eprint/3244/ https://oceanrep.geomar.de/id/eprint/3244/1/1-s2.0-S0967063709000193-main.pdf https://doi.org/10.1016/j.dsr.2009.01.001 en eng Elsevier https://oceanrep.geomar.de/id/eprint/3244/1/1-s2.0-S0967063709000193-main.pdf Schott, F., Stramma, L. , Giese, B. S. and Zantopp, R. J. (2009) Labrador Sea convection and subpolar North Atlantic Deep Water export in the SODA assimilation model. Deep Sea Research Part I: Oceanographic Research Papers, 56 (6). pp. 926-938. DOI 10.1016/j.dsr.2009.01.001 <https://doi.org/10.1016/j.dsr.2009.01.001>. doi:10.1016/j.dsr.2009.01.001 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2009 ftoceanrep https://doi.org/10.1016/j.dsr.2009.01.001 2023-04-07T14:47:22Z Labrador Sea convection was most intense and reached the greatest depths in the early 1990s, followed by weaker, shallower, and more variable convection after 1995. The Simple Ocean Data Assimilation (SODA) version 2.0.2/2.0.4 assimilation model is used to explore convective activity in the North Atlantic Ocean for the period from 1992 to 2007. Hydrographic conditions, which are relatively well observed during this period, are used to compare modeled and observed winter mixed-layer depths and water mass anomalies in relation to Deep Western Boundary Current transports and meridional overturning circulation (MOC) changes at the exit of the subpolar basin. The assimilation differs markedly from local observations in the March mixed-layer depth, which represents deep convection and water mass transformation. However, mean MOC rates at the exit of the subpolar gyre, forced by stratification in the mid-latitudes, are similar to estimates based on observations and show no significant decrease during the 1992–2007 period. SODA reproduces the deep Labrador Sea Water formation in the western North Atlantic without any clear indication of significant formation in the Irminger Sea while the lighter upper Labrador Sea Water density range is reached in the Irminger Sea in the 1990s, in agreement with existing assumptions of deep convection in the Irminger Sea and also supported by computed lag correlations with the Labrador Sea. Deep Water transformation mainly takes place in the eastern North Atlantic. The introduction of CFC-11 into the SODA model as a tracer reproduces the mean and multiyear variations of observed distributions. Article in Journal/Newspaper Labrador Sea North Atlantic Deep Water North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Deep Sea Research Part I: Oceanographic Research Papers 56 6 926 938 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Labrador Sea convection was most intense and reached the greatest depths in the early 1990s, followed by weaker, shallower, and more variable convection after 1995. The Simple Ocean Data Assimilation (SODA) version 2.0.2/2.0.4 assimilation model is used to explore convective activity in the North Atlantic Ocean for the period from 1992 to 2007. Hydrographic conditions, which are relatively well observed during this period, are used to compare modeled and observed winter mixed-layer depths and water mass anomalies in relation to Deep Western Boundary Current transports and meridional overturning circulation (MOC) changes at the exit of the subpolar basin. The assimilation differs markedly from local observations in the March mixed-layer depth, which represents deep convection and water mass transformation. However, mean MOC rates at the exit of the subpolar gyre, forced by stratification in the mid-latitudes, are similar to estimates based on observations and show no significant decrease during the 1992–2007 period. SODA reproduces the deep Labrador Sea Water formation in the western North Atlantic without any clear indication of significant formation in the Irminger Sea while the lighter upper Labrador Sea Water density range is reached in the Irminger Sea in the 1990s, in agreement with existing assumptions of deep convection in the Irminger Sea and also supported by computed lag correlations with the Labrador Sea. Deep Water transformation mainly takes place in the eastern North Atlantic. The introduction of CFC-11 into the SODA model as a tracer reproduces the mean and multiyear variations of observed distributions. |
format |
Article in Journal/Newspaper |
author |
Schott, Friedrich Stramma, Lothar Giese, B. S. Zantopp, Rainer J. |
spellingShingle |
Schott, Friedrich Stramma, Lothar Giese, B. S. Zantopp, Rainer J. Labrador Sea convection and subpolar North Atlantic Deep Water export in the SODA assimilation model |
author_facet |
Schott, Friedrich Stramma, Lothar Giese, B. S. Zantopp, Rainer J. |
author_sort |
Schott, Friedrich |
title |
Labrador Sea convection and subpolar North Atlantic Deep Water export in the SODA assimilation model |
title_short |
Labrador Sea convection and subpolar North Atlantic Deep Water export in the SODA assimilation model |
title_full |
Labrador Sea convection and subpolar North Atlantic Deep Water export in the SODA assimilation model |
title_fullStr |
Labrador Sea convection and subpolar North Atlantic Deep Water export in the SODA assimilation model |
title_full_unstemmed |
Labrador Sea convection and subpolar North Atlantic Deep Water export in the SODA assimilation model |
title_sort |
labrador sea convection and subpolar north atlantic deep water export in the soda assimilation model |
publisher |
Elsevier |
publishDate |
2009 |
url |
https://oceanrep.geomar.de/id/eprint/3244/ https://oceanrep.geomar.de/id/eprint/3244/1/1-s2.0-S0967063709000193-main.pdf https://doi.org/10.1016/j.dsr.2009.01.001 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Irminger Sea |
geographic_facet |
Irminger Sea |
genre |
Labrador Sea North Atlantic Deep Water North Atlantic |
genre_facet |
Labrador Sea North Atlantic Deep Water North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/3244/1/1-s2.0-S0967063709000193-main.pdf Schott, F., Stramma, L. , Giese, B. S. and Zantopp, R. J. (2009) Labrador Sea convection and subpolar North Atlantic Deep Water export in the SODA assimilation model. Deep Sea Research Part I: Oceanographic Research Papers, 56 (6). pp. 926-938. DOI 10.1016/j.dsr.2009.01.001 <https://doi.org/10.1016/j.dsr.2009.01.001>. doi:10.1016/j.dsr.2009.01.001 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr.2009.01.001 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
56 |
container_issue |
6 |
container_start_page |
926 |
op_container_end_page |
938 |
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1766060891441201152 |