ANALYSIS OF SPACE-TIME VARIABILITY OF THE PLATA RIVER PLUME

Satellite ocean colour data from the Sea-Viewing Wide Field-of-View Sensor are analyzed to monitor the space-time variability of the Plata river plume over the continental shelf and slope. SeaWiFS Chlorophyll-a (CSAT) product is used to understand the nature of changes in the colour of waters and ho...

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Autores principales:	Piola,Alberto R., Romero,Silvia I.
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2004
Materias:	ocean color river plumes Plata plume SeaWiFS
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300030
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spelling	oai:scielo:S0717-653820040003000302005-05-16ANALYSIS OF SPACE-TIME VARIABILITY OF THE PLATA RIVER PLUMEPiola,Alberto R.Romero,Silvia I. ocean color river plumes Plata plume SeaWiFS Satellite ocean colour data from the Sea-Viewing Wide Field-of-View Sensor are analyzed to monitor the space-time variability of the Plata river plume over the continental shelf and slope. SeaWiFS Chlorophyll-a (CSAT) product is used to understand the nature of changes in the colour of waters and how this relates to variations in wind direction and river outflow. We use a 5-year data set (1998-2002) of Global Area Coverage monthly mean composites. The analysis of CSAT data reveals strong seasonal variability over the continental shelf with maximum northeastward penetrations in the austral winter (June to August). The plume may reach ~27S, about 1000 km northeast of the Plata estuary. In summer the plume is confined to south of 32°S and the Plata waters are frequently exported to the open ocean through the Brazil/Malvinas Confluence. This seasonal shift is similar to the variation of surface salinity observed in historical hydrographic data and is presumably associated to the variable influence of the along-shore wind stress. Interannually, 2002 showed the maximum northeastward penetration and the strongest anomalies (6mg/m³). From late 1999 to early 2000, a strong negative CSAT anomaly (<6mg/m³) within the estuary could be linked to a period of very low Plata outflow (<12,000m³/seg). Results suggest that CSAT geophysical product is a good indicator of the presence of the Plata diluted waters. Other Case II ocean colour products are being explored (CDOM)info: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=S0717-65382004000300030en10.4067/S0717-65382004000300030
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	ocean color river plumes Plata plume SeaWiFS
spellingShingle	ocean color river plumes Plata plume SeaWiFS Piola,Alberto R. Romero,Silvia I. ANALYSIS OF SPACE-TIME VARIABILITY OF THE PLATA RIVER PLUME
description	Satellite ocean colour data from the Sea-Viewing Wide Field-of-View Sensor are analyzed to monitor the space-time variability of the Plata river plume over the continental shelf and slope. SeaWiFS Chlorophyll-a (CSAT) product is used to understand the nature of changes in the colour of waters and how this relates to variations in wind direction and river outflow. We use a 5-year data set (1998-2002) of Global Area Coverage monthly mean composites. The analysis of CSAT data reveals strong seasonal variability over the continental shelf with maximum northeastward penetrations in the austral winter (June to August). The plume may reach ~27S, about 1000 km northeast of the Plata estuary. In summer the plume is confined to south of 32°S and the Plata waters are frequently exported to the open ocean through the Brazil/Malvinas Confluence. This seasonal shift is similar to the variation of surface salinity observed in historical hydrographic data and is presumably associated to the variable influence of the along-shore wind stress. Interannually, 2002 showed the maximum northeastward penetration and the strongest anomalies (6mg/m³). From late 1999 to early 2000, a strong negative CSAT anomaly (<6mg/m³) within the estuary could be linked to a period of very low Plata outflow (<12,000m³/seg). Results suggest that CSAT geophysical product is a good indicator of the presence of the Plata diluted waters. Other Case II ocean colour products are being explored (CDOM)
author	Piola,Alberto R. Romero,Silvia I.
author_facet	Piola,Alberto R. Romero,Silvia I.
author_sort	Piola,Alberto R.
title	ANALYSIS OF SPACE-TIME VARIABILITY OF THE PLATA RIVER PLUME
title_short	ANALYSIS OF SPACE-TIME VARIABILITY OF THE PLATA RIVER PLUME
title_full	ANALYSIS OF SPACE-TIME VARIABILITY OF THE PLATA RIVER PLUME
title_fullStr	ANALYSIS OF SPACE-TIME VARIABILITY OF THE PLATA RIVER PLUME
title_full_unstemmed	ANALYSIS OF SPACE-TIME VARIABILITY OF THE PLATA RIVER PLUME
title_sort	analysis of space-time variability of the plata river plume
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300030
work_keys_str_mv	AT piolaalbertor analysisofspacetimevariabilityoftheplatariverplume AT romerosilviai analysisofspacetimevariabilityoftheplatariverplume
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ANALYSIS OF SPACE-TIME VARIABILITY OF THE PLATA RIVER PLUME

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