SPATIAL AND TEMPORAL VARIABILITY OF THERMAL FRONTS OFF CENTRAL CHILE (33-40S)

SPATIAL AND TEMPORAL VARIABILITY OF THERMAL FRONTS OFF CENTRAL CHILE (33-40S)

During the upwelling season along the coast off central Chile (33-40S), cold upwelled water can be easily distinguished from warm oceanic water using satellite infrared images. The boundary between cold and warm surface waters is a relatively narrow region with large horizontal gradients, denominate...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Letelier,J., Pizarro,O., Núñez,S., Arcos,D.
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=S0717-65382004000300008
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:scielo:S0717-65382004000300008
record_format dspace
spelling oai:scielo:S0717-653820040003000082005-05-16SPATIAL AND TEMPORAL VARIABILITY OF THERMAL FRONTS OFF CENTRAL CHILE (33-40S)Letelier,J.Pizarro,O.Núñez,S.Arcos,D.During the upwelling season along the coast off central Chile (33-40S), cold upwelled water can be easily distinguished from warm oceanic water using satellite infrared images. The boundary between cold and warm surface waters is a relatively narrow region with large horizontal gradients, denominated upwelling front, which is also clearly visible in satellite images. Here, using daily NOAA satellite infrared images from the period 1998-2000, we described the spatial distribution of mesoscale features related to upwelling fronts. Together with infrared data, we use SeaWiFS's color images to explore the relationship between Chlorophyll concentration and thermal upwelling fronts. Our results show that thermal fronts have maximum intensities (0.2C/km) in spring and summer and they are typically located between 30 and 300 km off the coast. The offshore extension of the upwelling front was usually larger between 35-37S, related to the presence of a large anticyclonic eddy in this region during the warm season. In general, chlorophyll was well correlated (inversely) to SST showing similar offshore variability scale and covariance in mesoscale features like eddies and filamentsinfo:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.68 n.2 suppl.TIIProc 20042004-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300008en10.4067/S0717-65382004000300008
institution Scielo Chile
collection Scielo Chile
language English
description During the upwelling season along the coast off central Chile (33-40S), cold upwelled water can be easily distinguished from warm oceanic water using satellite infrared images. The boundary between cold and warm surface waters is a relatively narrow region with large horizontal gradients, denominated upwelling front, which is also clearly visible in satellite images. Here, using daily NOAA satellite infrared images from the period 1998-2000, we described the spatial distribution of mesoscale features related to upwelling fronts. Together with infrared data, we use SeaWiFS's color images to explore the relationship between Chlorophyll concentration and thermal upwelling fronts. Our results show that thermal fronts have maximum intensities (0.2C/km) in spring and summer and they are typically located between 30 and 300 km off the coast. The offshore extension of the upwelling front was usually larger between 35-37S, related to the presence of a large anticyclonic eddy in this region during the warm season. In general, chlorophyll was well correlated (inversely) to SST showing similar offshore variability scale and covariance in mesoscale features like eddies and filaments
author Letelier,J.
Pizarro,O.
Núñez,S.
Arcos,D.
spellingShingle Letelier,J.
Pizarro,O.
Núñez,S.
Arcos,D.
SPATIAL AND TEMPORAL VARIABILITY OF THERMAL FRONTS OFF CENTRAL CHILE (33-40S)
author_facet Letelier,J.
Pizarro,O.
Núñez,S.
Arcos,D.
author_sort Letelier,J.
title SPATIAL AND TEMPORAL VARIABILITY OF THERMAL FRONTS OFF CENTRAL CHILE (33-40S)
title_short SPATIAL AND TEMPORAL VARIABILITY OF THERMAL FRONTS OFF CENTRAL CHILE (33-40S)
title_full SPATIAL AND TEMPORAL VARIABILITY OF THERMAL FRONTS OFF CENTRAL CHILE (33-40S)
title_fullStr SPATIAL AND TEMPORAL VARIABILITY OF THERMAL FRONTS OFF CENTRAL CHILE (33-40S)
title_full_unstemmed SPATIAL AND TEMPORAL VARIABILITY OF THERMAL FRONTS OFF CENTRAL CHILE (33-40S)
title_sort spatial and temporal variability of thermal fronts off central chile (33-40s)
publisher Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate 2004
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300008
work_keys_str_mv AT letelierj spatialandtemporalvariabilityofthermalfrontsoffcentralchile3340s
AT pizarroo spatialandtemporalvariabilityofthermalfrontsoffcentralchile3340s
AT nunezs spatialandtemporalvariabilityofthermalfrontsoffcentralchile3340s
AT arcosd spatialandtemporalvariabilityofthermalfrontsoffcentralchile3340s
_version_ 1718442074074775552

Ejemplares similares