Oceanic fronts in the southern Indian Ocean as inferred from the NOAA SST, TOPEX/Poseidon and ERS-2 altimetry data

Weekly NODS/MCSST (the NASA Ocean Data System/Multi-Channel Sea Surface Temperature) dataset was used to investigate detailed structure and space-time variability of large-scale fronts in the Southern Indian Ocean (30°60°S and 20°150°E) during the period of 1997-1999. The constructed SST gradient ma...

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Autores principales:	Kostianoy,A.G., Ginzburg,A.I., Lebedev,S.A., Frankignoulle,M., Delille,B.
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=S0717-65382004000300003
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spelling	oai:scielo:S0717-653820040003000032005-05-16Oceanic fronts in the southern Indian Ocean as inferred from the NOAA SST, TOPEX/Poseidon and ERS-2 altimetry dataKostianoy,A.G.Ginzburg,A.I.Lebedev,S.A.Frankignoulle,M.Delille,B.Weekly NODS/MCSST (the NASA Ocean Data System/Multi-Channel Sea Surface Temperature) dataset was used to investigate detailed structure and space-time variability of large-scale fronts in the Southern Indian Ocean (30°60°S and 20°150°E) during the period of 1997-1999. The constructed SST gradient maps for 36 mid-month weeks gave simultaneous viewing of five basic fronts in the whole basin: the North and South Subtropical fronts, the Agulhas Front, the Subantarctic Front, and the Polar Front. Mean location, SST and SST gradients with corresponding standard deviations were calculated for every front at each 10°-spaced longitude. SST gradient maps and charts of sea level anomalies (SLA) based on the combined altimetry data from the TOPEX/Poseidon and ERS-2 satellites, as well as corresponding charts of sea surface dynamic heights (constructed by the superposition of SLA distributions over the climatic dynamic topography), were used to study mesoscale variability related to the fronts. The analysis allowed to distinguish zones of enhanced meandering (eddy formation) with amplitudes of 2°-5° in latitude and wavelength of several degrees in longitude, and their relationship with bottom topography peculiarities. Double structure of fronts and close approach of neighboring fronts appear in different areas of the basininfo: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=S0717-65382004000300003en10.4067/S0717-65382004000300003
institution	Scielo Chile
collection	Scielo Chile
language	English
description	Weekly NODS/MCSST (the NASA Ocean Data System/Multi-Channel Sea Surface Temperature) dataset was used to investigate detailed structure and space-time variability of large-scale fronts in the Southern Indian Ocean (30°60°S and 20°150°E) during the period of 1997-1999. The constructed SST gradient maps for 36 mid-month weeks gave simultaneous viewing of five basic fronts in the whole basin: the North and South Subtropical fronts, the Agulhas Front, the Subantarctic Front, and the Polar Front. Mean location, SST and SST gradients with corresponding standard deviations were calculated for every front at each 10°-spaced longitude. SST gradient maps and charts of sea level anomalies (SLA) based on the combined altimetry data from the TOPEX/Poseidon and ERS-2 satellites, as well as corresponding charts of sea surface dynamic heights (constructed by the superposition of SLA distributions over the climatic dynamic topography), were used to study mesoscale variability related to the fronts. The analysis allowed to distinguish zones of enhanced meandering (eddy formation) with amplitudes of 2°-5° in latitude and wavelength of several degrees in longitude, and their relationship with bottom topography peculiarities. Double structure of fronts and close approach of neighboring fronts appear in different areas of the basin
author	Kostianoy,A.G. Ginzburg,A.I. Lebedev,S.A. Frankignoulle,M. Delille,B.
spellingShingle	Kostianoy,A.G. Ginzburg,A.I. Lebedev,S.A. Frankignoulle,M. Delille,B. Oceanic fronts in the southern Indian Ocean as inferred from the NOAA SST, TOPEX/Poseidon and ERS-2 altimetry data
author_facet	Kostianoy,A.G. Ginzburg,A.I. Lebedev,S.A. Frankignoulle,M. Delille,B.
author_sort	Kostianoy,A.G.
title	Oceanic fronts in the southern Indian Ocean as inferred from the NOAA SST, TOPEX/Poseidon and ERS-2 altimetry data
title_short	Oceanic fronts in the southern Indian Ocean as inferred from the NOAA SST, TOPEX/Poseidon and ERS-2 altimetry data
title_full	Oceanic fronts in the southern Indian Ocean as inferred from the NOAA SST, TOPEX/Poseidon and ERS-2 altimetry data
title_fullStr	Oceanic fronts in the southern Indian Ocean as inferred from the NOAA SST, TOPEX/Poseidon and ERS-2 altimetry data
title_full_unstemmed	Oceanic fronts in the southern Indian Ocean as inferred from the NOAA SST, TOPEX/Poseidon and ERS-2 altimetry data
title_sort	oceanic fronts in the southern indian ocean as inferred from the noaa sst, topex/poseidon and ers-2 altimetry data
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300003
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Oceanic fronts in the southern Indian Ocean as inferred from the NOAA SST, TOPEX/Poseidon and ERS-2 altimetry data

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