Sea surface height trend and variability at seasonal and interannual time scales in the Southeastern South American continental shelf between 27°S and 40°S

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Recent improvements in satellite altimetry data correction terms are encouraging studies of the remote sensed sea level anomalies (SLA) progressively closer to the coast and over shallow continental shelves. In this paper we describe and discuss the SLA trend and variability at seasonal and interann...

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Autores principales: Saraceno, M., Simionato, C.G., Ruiz-Etcheverry, L.A.
Formato: JOUR
Materias:
Altimetry
Rio de la Plata estuarine
Sea surface height
Seasonal cycle
Trend
continental shelf
oceanic current
satellite altimetry
satellite data
sea surface height
temporal variation
timescale
wind forcing
Rio de la Plata
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02784343_v91_n_p82_Saraceno
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02784343_v91_n_p82_Saraceno
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spelling todo:paper_02784343_v91_n_p82_Saraceno2023-10-03T15:17:02Z Sea surface height trend and variability at seasonal and interannual time scales in the Southeastern South American continental shelf between 27°S and 40°S Saraceno, M. Simionato, C.G. Ruiz-Etcheverry, L.A. Altimetry Rio de la Plata estuarine Sea surface height Seasonal cycle Trend continental shelf oceanic current satellite altimetry satellite data sea surface height temporal variation timescale wind forcing Rio de la Plata Recent improvements in satellite altimetry data correction terms are encouraging studies of the remote sensed sea level anomalies (SLA) progressively closer to the coast and over shallow continental shelves. In this paper we describe and discuss the SLA trend and variability at seasonal and interannual time scales in the southeastern South American continental shelf influenced by the Río de la Plata estuary and the Patos Lagoon fresh waters. The spatio-temporal coverage of the gridded altimetry SLA data allows identify several variability patterns and the associated physical processes. On seasonal time scales, the combination of the solar radiation and wind forcing cycles accounts for up to 98% of the variability. Seasonal variability of the wind is responsible for a difference of up to 16cm between the southern (Argentinean) Río de la Plata estuary coast and the Uruguayan and southern Brazilian coasts. On interannual time scales, positive/negative SLA anomalies are coherent with El Niño/La Niña events. Finally, a significant positive trend of up to 5mmyr-1 is found in all the study area except in the region around the Patos Lagoon (Brazil) and part of the Río de la Plata. Besides the local relevance of the results, this study indicates that satellite altimetry data are accurate enough to unveil SLA spatio-temporal patterns close to the coast and over continental shelves in the mentioned time scales. © 2014 Elsevier Ltd. Fil:Saraceno, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Simionato, C.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02784343_v91_n_p82_Saraceno
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Altimetry
Rio de la Plata estuarine
Sea surface height
Seasonal cycle
Trend
continental shelf
oceanic current
satellite altimetry
satellite data
sea surface height
temporal variation
timescale
wind forcing
Rio de la Plata
spellingShingle Altimetry
Rio de la Plata estuarine
Sea surface height
Seasonal cycle
Trend
continental shelf
oceanic current
satellite altimetry
satellite data
sea surface height
temporal variation
timescale
wind forcing
Rio de la Plata
Saraceno, M.
Simionato, C.G.
Ruiz-Etcheverry, L.A.
Sea surface height trend and variability at seasonal and interannual time scales in the Southeastern South American continental shelf between 27°S and 40°S
topic_facet Altimetry
Rio de la Plata estuarine
Sea surface height
Seasonal cycle
Trend
continental shelf
oceanic current
satellite altimetry
satellite data
sea surface height
temporal variation
timescale
wind forcing
Rio de la Plata
description Recent improvements in satellite altimetry data correction terms are encouraging studies of the remote sensed sea level anomalies (SLA) progressively closer to the coast and over shallow continental shelves. In this paper we describe and discuss the SLA trend and variability at seasonal and interannual time scales in the southeastern South American continental shelf influenced by the Río de la Plata estuary and the Patos Lagoon fresh waters. The spatio-temporal coverage of the gridded altimetry SLA data allows identify several variability patterns and the associated physical processes. On seasonal time scales, the combination of the solar radiation and wind forcing cycles accounts for up to 98% of the variability. Seasonal variability of the wind is responsible for a difference of up to 16cm between the southern (Argentinean) Río de la Plata estuary coast and the Uruguayan and southern Brazilian coasts. On interannual time scales, positive/negative SLA anomalies are coherent with El Niño/La Niña events. Finally, a significant positive trend of up to 5mmyr-1 is found in all the study area except in the region around the Patos Lagoon (Brazil) and part of the Río de la Plata. Besides the local relevance of the results, this study indicates that satellite altimetry data are accurate enough to unveil SLA spatio-temporal patterns close to the coast and over continental shelves in the mentioned time scales. © 2014 Elsevier Ltd.
format JOUR
author Saraceno, M.
Simionato, C.G.
Ruiz-Etcheverry, L.A.
author_facet Saraceno, M.
Simionato, C.G.
Ruiz-Etcheverry, L.A.
author_sort Saraceno, M.
title Sea surface height trend and variability at seasonal and interannual time scales in the Southeastern South American continental shelf between 27°S and 40°S
title_short Sea surface height trend and variability at seasonal and interannual time scales in the Southeastern South American continental shelf between 27°S and 40°S
title_full Sea surface height trend and variability at seasonal and interannual time scales in the Southeastern South American continental shelf between 27°S and 40°S
title_fullStr Sea surface height trend and variability at seasonal and interannual time scales in the Southeastern South American continental shelf between 27°S and 40°S
title_full_unstemmed Sea surface height trend and variability at seasonal and interannual time scales in the Southeastern South American continental shelf between 27°S and 40°S
title_sort sea surface height trend and variability at seasonal and interannual time scales in the southeastern south american continental shelf between 27°s and 40°s
url http://hdl.handle.net/20.500.12110/paper_02784343_v91_n_p82_Saraceno
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AT ruizetcheverryla seasurfaceheighttrendandvariabilityatseasonalandinterannualtimescalesinthesoutheasternsouthamericancontinentalshelfbetween27sand40s
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