EDDY CHARACTERISTICS AND TRACER TRANSPORTS FROM TP/ERS ALTIMETRY, IN A REGION OFFSHORE CHILE

Based on 9 years (1993-2001) of Sea Level Anomaly measurements from TP/ERS altimeters, we characterize the mesoscale structures of the eastern South Pacific (10-35°S, 70-100°W). Integral zonal, meridional, and temporal scales of the mesoscale activity are described geographically in the study region...

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Autores principales: Chaigneau,Alexis, Pizarro,Oscar
Lenguaje:English
Publicado: Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2004
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200019
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spelling oai:scielo:S0717-653820040002000192005-09-14EDDY CHARACTERISTICS AND TRACER TRANSPORTS FROM TP/ERS ALTIMETRY, IN A REGION OFFSHORE CHILEChaigneau,AlexisPizarro,OscarBased on 9 years (1993-2001) of Sea Level Anomaly measurements from TP/ERS altimeters, we characterize the mesoscale structures of the eastern South Pacific (10-35°S, 70-100°W). Integral zonal, meridional, and temporal scales of the mesoscale activity are described geographically in the study region. The length scales increase toward the north in agreement with the increase of the Rossby radius, whereas timescales show higher values in the south of the domain. Typical values of (Lx, Ly) are around 50 km at 35°S and 80-90 km at 10°S with elongation in the zonal direction revealing the anisotropic nature of the mesoscale structures. Timescales are in the range 15-45 days. We also estimate a space-varying eddy transfer coefficient K which parameterize the effect of the eddies on the lateral tracer transports. K increases in the regions of high levels of eddy kinetic energy and is in the range of 110(7) to 410(7) cm².s-1. Considering mean climatological property gradients, we show that near the coast, the mesoscale eddies can play an important role on the long term heat and salt budgetsinfo:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.68 n.2 suppl.TIProc 20042004-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200019en10.4067/S0717-65382004000200019
institution Scielo Chile
collection Scielo Chile
language English
description Based on 9 years (1993-2001) of Sea Level Anomaly measurements from TP/ERS altimeters, we characterize the mesoscale structures of the eastern South Pacific (10-35°S, 70-100°W). Integral zonal, meridional, and temporal scales of the mesoscale activity are described geographically in the study region. The length scales increase toward the north in agreement with the increase of the Rossby radius, whereas timescales show higher values in the south of the domain. Typical values of (Lx, Ly) are around 50 km at 35°S and 80-90 km at 10°S with elongation in the zonal direction revealing the anisotropic nature of the mesoscale structures. Timescales are in the range 15-45 days. We also estimate a space-varying eddy transfer coefficient K which parameterize the effect of the eddies on the lateral tracer transports. K increases in the regions of high levels of eddy kinetic energy and is in the range of 110(7) to 410(7) cm².s-1. Considering mean climatological property gradients, we show that near the coast, the mesoscale eddies can play an important role on the long term heat and salt budgets
author Chaigneau,Alexis
Pizarro,Oscar
spellingShingle Chaigneau,Alexis
Pizarro,Oscar
EDDY CHARACTERISTICS AND TRACER TRANSPORTS FROM TP/ERS ALTIMETRY, IN A REGION OFFSHORE CHILE
author_facet Chaigneau,Alexis
Pizarro,Oscar
author_sort Chaigneau,Alexis
title EDDY CHARACTERISTICS AND TRACER TRANSPORTS FROM TP/ERS ALTIMETRY, IN A REGION OFFSHORE CHILE
title_short EDDY CHARACTERISTICS AND TRACER TRANSPORTS FROM TP/ERS ALTIMETRY, IN A REGION OFFSHORE CHILE
title_full EDDY CHARACTERISTICS AND TRACER TRANSPORTS FROM TP/ERS ALTIMETRY, IN A REGION OFFSHORE CHILE
title_fullStr EDDY CHARACTERISTICS AND TRACER TRANSPORTS FROM TP/ERS ALTIMETRY, IN A REGION OFFSHORE CHILE
title_full_unstemmed EDDY CHARACTERISTICS AND TRACER TRANSPORTS FROM TP/ERS ALTIMETRY, IN A REGION OFFSHORE CHILE
title_sort eddy characteristics and tracer transports from tp/ers altimetry, in a region offshore chile
publisher Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate 2004
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200019
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AT pizarrooscar eddycharacteristicsandtracertransportsfromtpersaltimetryinaregionoffshorechile
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