Effects of variability in the Agulhas Leakage on the western boundary systems of the South and tropical Atlantic Ocean

2016 Ocean Sciences Meeting, 21-26 February 2016, New Orleans The Agulhas System is a complex dynamical structure characterized by the intrusion of Indian Ocean waters into the South Atlantic Ocean by means of filaments and rings shed at the Agulhas Current retroflection. This influx of warmer and s...

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Main Authors: Castellanos, Paola, Campos, Edmo, Piera, Jaume, Sato, O.T., Silva Dias, M.A.F.
Format: Still Image
Language:unknown
Published: American Geophysical Union 2016
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Online Access:http://hdl.handle.net/10261/162011
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spelling ftcsic:oai:digital.csic.es:10261/162011 2024-02-11T10:08:36+01:00 Effects of variability in the Agulhas Leakage on the western boundary systems of the South and tropical Atlantic Ocean Castellanos, Paola Campos, Edmo Piera, Jaume Sato, O.T. Silva Dias, M.A.F. 2016-02 http://hdl.handle.net/10261/162011 unknown American Geophysical Union https://osm.agu.org/2016/scientific-program/ Sí 2016 Ocean Sciences Meeting http://hdl.handle.net/10261/162011 none póster de congreso http://purl.org/coar/resource_type/c_6670 2016 ftcsic 2024-01-16T10:28:59Z 2016 Ocean Sciences Meeting, 21-26 February 2016, New Orleans The Agulhas System is a complex dynamical structure characterized by the intrusion of Indian Ocean waters into the South Atlantic Ocean by means of filaments and rings shed at the Agulhas Current retroflection. This influx of warmer and saltier Indian Ocean waters into the Atlantic - the Agulhas leakage - is now recognized to play an important role in the global thermohaline circulation and climate. Studies have shown that the variability of the Agulhas leakage can be associated with the onset and terminations of glacial periods. This work is an investigation of the implications of changes in the Agulhas leakage on the South Atlantic Ocean. To this end, outputs of a numerical experiment with the Hybrid Coordinate Ocean Model (HYCOM), with 1/12-degree resolution and 22-isopycnal layers, are analyzed for the period 1970-2010. Results show an increase in the leakage and in integrated transports across the South and tropical Atlantic. Significant linear trends are found in the transport at 20ºS, 15ºS, and 5ºS. These trends correlate well with decadal fluctuations of the Agulhas leakage. It is also found that it takes 6 to 8 years for anomalies in the Agulhas volume transport to arrive at the tropical Atlantic region. This seems to be related to an increase in the latent heat flux observed along the NE Brazil coastline since 2003, with impacts on near-coastal processes Peer Reviewed Still Image South Atlantic Ocean Digital.CSIC (Spanish National Research Council) Indian Orleans ENVELOPE(-60.667,-60.667,-63.950,-63.950)
institution Open Polar
collection Digital.CSIC (Spanish National Research Council)
op_collection_id ftcsic
language unknown
description 2016 Ocean Sciences Meeting, 21-26 February 2016, New Orleans The Agulhas System is a complex dynamical structure characterized by the intrusion of Indian Ocean waters into the South Atlantic Ocean by means of filaments and rings shed at the Agulhas Current retroflection. This influx of warmer and saltier Indian Ocean waters into the Atlantic - the Agulhas leakage - is now recognized to play an important role in the global thermohaline circulation and climate. Studies have shown that the variability of the Agulhas leakage can be associated with the onset and terminations of glacial periods. This work is an investigation of the implications of changes in the Agulhas leakage on the South Atlantic Ocean. To this end, outputs of a numerical experiment with the Hybrid Coordinate Ocean Model (HYCOM), with 1/12-degree resolution and 22-isopycnal layers, are analyzed for the period 1970-2010. Results show an increase in the leakage and in integrated transports across the South and tropical Atlantic. Significant linear trends are found in the transport at 20ºS, 15ºS, and 5ºS. These trends correlate well with decadal fluctuations of the Agulhas leakage. It is also found that it takes 6 to 8 years for anomalies in the Agulhas volume transport to arrive at the tropical Atlantic region. This seems to be related to an increase in the latent heat flux observed along the NE Brazil coastline since 2003, with impacts on near-coastal processes Peer Reviewed
format Still Image
author Castellanos, Paola
Campos, Edmo
Piera, Jaume
Sato, O.T.
Silva Dias, M.A.F.
spellingShingle Castellanos, Paola
Campos, Edmo
Piera, Jaume
Sato, O.T.
Silva Dias, M.A.F.
Effects of variability in the Agulhas Leakage on the western boundary systems of the South and tropical Atlantic Ocean
author_facet Castellanos, Paola
Campos, Edmo
Piera, Jaume
Sato, O.T.
Silva Dias, M.A.F.
author_sort Castellanos, Paola
title Effects of variability in the Agulhas Leakage on the western boundary systems of the South and tropical Atlantic Ocean
title_short Effects of variability in the Agulhas Leakage on the western boundary systems of the South and tropical Atlantic Ocean
title_full Effects of variability in the Agulhas Leakage on the western boundary systems of the South and tropical Atlantic Ocean
title_fullStr Effects of variability in the Agulhas Leakage on the western boundary systems of the South and tropical Atlantic Ocean
title_full_unstemmed Effects of variability in the Agulhas Leakage on the western boundary systems of the South and tropical Atlantic Ocean
title_sort effects of variability in the agulhas leakage on the western boundary systems of the south and tropical atlantic ocean
publisher American Geophysical Union
publishDate 2016
url http://hdl.handle.net/10261/162011
long_lat ENVELOPE(-60.667,-60.667,-63.950,-63.950)
geographic Indian
Orleans
geographic_facet Indian
Orleans
genre South Atlantic Ocean
genre_facet South Atlantic Ocean
op_relation https://osm.agu.org/2016/scientific-program/

2016 Ocean Sciences Meeting
http://hdl.handle.net/10261/162011
op_rights none
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