Coupled variability and air-sea interaction in the South Atlantic Ocean
52 years of data (1949-2000) from the NCEP-NCAR reanalysis are used to investigate mechanisms involved in forcing and damping of Sea Surface Temperature (SST) variability in the South Atlantic Ocean. Organized patterns of coupled ocean-atmosphere variability are identified using EOF and SVD analyses...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.161.4586 2023-05-15T18:20:39+02:00 Coupled variability and air-sea interaction in the South Atlantic Ocean Andreas Sterl Wilco Hazeleger The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.161.4586 http://www.knmi.nl/publications/fulltexts/satl3_full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.161.4586 http://www.knmi.nl/publications/fulltexts/satl3_full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.knmi.nl/publications/fulltexts/satl3_full.pdf text 2003 ftciteseerx 2016-01-07T15:44:25Z 52 years of data (1949-2000) from the NCEP-NCAR reanalysis are used to investigate mechanisms involved in forcing and damping of Sea Surface Temperature (SST) variability in the South Atlantic Ocean. Organized patterns of coupled ocean-atmosphere variability are identified using EOF and SVD analyses. The leading mode of coupled variability consists of an SST pattern with a strong northeast-southwest gradient and an SLP monopole centered at 15 ◦ W, 45 ◦ S. The anomalous winds associated with this monopole generate the SST pattern through anomalous latent heat flux and mixed layer deepening. Other heat flux components and anomalous Ekman transport play only a secondary role. Once established, the SST pattern is attenuated through latent heat flux. The higher SST modes are also induced by anomalous winds and destroyed by latent heat flux. It thus appears that the coupled variability in the South Atlantic Ocean consists of atmospheric circulation anomalies that induce SST anomalies through anomalous latent heat fluxes and wind-induced mixed layer deepening. These SST anomalies are destroyed by latent heat flux with no detectable systematic feedback onto the atmospheric circulation. Atmospheric variability in the South Atlantic is found to be largely independent of that elsewhere, although there is a weak relation with ENSO (El Niño-Southern Oscillation). 1 Text South Atlantic Ocean Unknown |
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English |
description |
52 years of data (1949-2000) from the NCEP-NCAR reanalysis are used to investigate mechanisms involved in forcing and damping of Sea Surface Temperature (SST) variability in the South Atlantic Ocean. Organized patterns of coupled ocean-atmosphere variability are identified using EOF and SVD analyses. The leading mode of coupled variability consists of an SST pattern with a strong northeast-southwest gradient and an SLP monopole centered at 15 ◦ W, 45 ◦ S. The anomalous winds associated with this monopole generate the SST pattern through anomalous latent heat flux and mixed layer deepening. Other heat flux components and anomalous Ekman transport play only a secondary role. Once established, the SST pattern is attenuated through latent heat flux. The higher SST modes are also induced by anomalous winds and destroyed by latent heat flux. It thus appears that the coupled variability in the South Atlantic Ocean consists of atmospheric circulation anomalies that induce SST anomalies through anomalous latent heat fluxes and wind-induced mixed layer deepening. These SST anomalies are destroyed by latent heat flux with no detectable systematic feedback onto the atmospheric circulation. Atmospheric variability in the South Atlantic is found to be largely independent of that elsewhere, although there is a weak relation with ENSO (El Niño-Southern Oscillation). 1 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Andreas Sterl Wilco Hazeleger |
spellingShingle |
Andreas Sterl Wilco Hazeleger Coupled variability and air-sea interaction in the South Atlantic Ocean |
author_facet |
Andreas Sterl Wilco Hazeleger |
author_sort |
Andreas Sterl |
title |
Coupled variability and air-sea interaction in the South Atlantic Ocean |
title_short |
Coupled variability and air-sea interaction in the South Atlantic Ocean |
title_full |
Coupled variability and air-sea interaction in the South Atlantic Ocean |
title_fullStr |
Coupled variability and air-sea interaction in the South Atlantic Ocean |
title_full_unstemmed |
Coupled variability and air-sea interaction in the South Atlantic Ocean |
title_sort |
coupled variability and air-sea interaction in the south atlantic ocean |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.161.4586 http://www.knmi.nl/publications/fulltexts/satl3_full.pdf |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
http://www.knmi.nl/publications/fulltexts/satl3_full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.161.4586 http://www.knmi.nl/publications/fulltexts/satl3_full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766198241008812032 |