Multiple thermal fronts near the Patagonian shelf break

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Eighteen year (1985-2002) sea surface temperature (SST) data are used to study the intraseasonal variability of the Patagonian shelf break front (SBF) in the SW South Atlantic Ocean between 39° and 44°S. The cross-shelf break SST gradients reveal distinct, previously undocumented thermal fronts loca...

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Autores principales: Franco, B.C., Piola, A.R., Rivas, A.L., Baldoni, A., Pisoni, J.P.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2008
Materias:
Atmospheric temperature
Climate change
Potential flow
Topography
Vorticity
Intraseasonal variability
Potential vorticity
Sea surface temperature (SST)
Oceanography
oceanic front
sea surface temperature
seasonal variation
shelf break front
temperature gradient
Atlantic Ocean
Atlantic Ocean (South)
Malvinas Current
Patagonian Shelf
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00948276_v35_n2_p_Franco
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paperaa:paper_00948276_v35_n2_p_Franco
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spelling paperaa:paper_00948276_v35_n2_p_Franco2023-06-12T16:46:19Z Multiple thermal fronts near the Patagonian shelf break Geophys. Res. Lett. 2008;35(2) Franco, B.C. Piola, A.R. Rivas, A.L. Baldoni, A. Pisoni, J.P. Atmospheric temperature Climate change Potential flow Topography Vorticity Intraseasonal variability Potential vorticity Sea surface temperature (SST) Oceanography oceanic front sea surface temperature seasonal variation shelf break front temperature gradient Atlantic Ocean Atlantic Ocean (South) Malvinas Current Patagonian Shelf Eighteen year (1985-2002) sea surface temperature (SST) data are used to study the intraseasonal variability of the Patagonian shelf break front (SBF) in the SW South Atlantic Ocean between 39° and 44°S. The cross-shelf break SST gradients reveal distinct, previously undocumented thermal fronts located both, offshore and inshore of the SBF. Throughout the year the main SBF, identified as a band of negative SST gradient maxima (relatively strong offshore temperature decrease), forms a persistent feature located closed to the 200 m isobath, while two distinct negative gradient maxima are located inshore and offshore of this location. Daily SST images reveal the presence of three branches of cold waters whose edges delineate the above mentioned fronts. The two offshore branches closely follow lines of constant potential vorticity (f/h) and appear to be associated with the Malvinas Current, while a third branch, located further onshore, is not steered by the bottom topography. South of 40°S the onshore branch forms a quasi permanent front parallel to the SBF. Copyright 2008 by the American Geophysical Union. Fil:Rivas, A.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pisoni, J.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00948276_v35_n2_p_Franco
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Atmospheric temperature
Climate change
Potential flow
Topography
Vorticity
Intraseasonal variability
Potential vorticity
Sea surface temperature (SST)
Oceanography
oceanic front
sea surface temperature
seasonal variation
shelf break front
temperature gradient
Atlantic Ocean
Atlantic Ocean (South)
Malvinas Current
Patagonian Shelf
spellingShingle Atmospheric temperature
Climate change
Potential flow
Topography
Vorticity
Intraseasonal variability
Potential vorticity
Sea surface temperature (SST)
Oceanography
oceanic front
sea surface temperature
seasonal variation
shelf break front
temperature gradient
Atlantic Ocean
Atlantic Ocean (South)
Malvinas Current
Patagonian Shelf
Franco, B.C.
Piola, A.R.
Rivas, A.L.
Baldoni, A.
Pisoni, J.P.
Multiple thermal fronts near the Patagonian shelf break
topic_facet Atmospheric temperature
Climate change
Potential flow
Topography
Vorticity
Intraseasonal variability
Potential vorticity
Sea surface temperature (SST)
Oceanography
oceanic front
sea surface temperature
seasonal variation
shelf break front
temperature gradient
Atlantic Ocean
Atlantic Ocean (South)
Malvinas Current
Patagonian Shelf
description Eighteen year (1985-2002) sea surface temperature (SST) data are used to study the intraseasonal variability of the Patagonian shelf break front (SBF) in the SW South Atlantic Ocean between 39° and 44°S. The cross-shelf break SST gradients reveal distinct, previously undocumented thermal fronts located both, offshore and inshore of the SBF. Throughout the year the main SBF, identified as a band of negative SST gradient maxima (relatively strong offshore temperature decrease), forms a persistent feature located closed to the 200 m isobath, while two distinct negative gradient maxima are located inshore and offshore of this location. Daily SST images reveal the presence of three branches of cold waters whose edges delineate the above mentioned fronts. The two offshore branches closely follow lines of constant potential vorticity (f/h) and appear to be associated with the Malvinas Current, while a third branch, located further onshore, is not steered by the bottom topography. South of 40°S the onshore branch forms a quasi permanent front parallel to the SBF. Copyright 2008 by the American Geophysical Union.
format Artículo
Artículo
publishedVersion
author Franco, B.C.
Piola, A.R.
Rivas, A.L.
Baldoni, A.
Pisoni, J.P.
author_facet Franco, B.C.
Piola, A.R.
Rivas, A.L.
Baldoni, A.
Pisoni, J.P.
author_sort Franco, B.C.
title Multiple thermal fronts near the Patagonian shelf break
title_short Multiple thermal fronts near the Patagonian shelf break
title_full Multiple thermal fronts near the Patagonian shelf break
title_fullStr Multiple thermal fronts near the Patagonian shelf break
title_full_unstemmed Multiple thermal fronts near the Patagonian shelf break
title_sort multiple thermal fronts near the patagonian shelf break
publishDate 2008
url http://hdl.handle.net/20.500.12110/paper_00948276_v35_n2_p_Franco
work_keys_str_mv AT francobc multiplethermalfrontsnearthepatagonianshelfbreak
AT piolaar multiplethermalfrontsnearthepatagonianshelfbreak
AT rivasal multiplethermalfrontsnearthepatagonianshelfbreak
AT baldonia multiplethermalfrontsnearthepatagonianshelfbreak
AT pisonijp multiplethermalfrontsnearthepatagonianshelfbreak
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