Annual variability of sea surface temperature in the Northern Argentinean Continental Shelf

Twelve years of daily satellite data (0.1° spatial resolution) were used to study the seasonal variability of the sea surface temperature (SST) over the Northern Argentinean Continental Shelf (NACS; between 33°- 45° S and 52°- 66° W). The seasonal cycle, which includes the annual and semi-annual sig...

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Autores principales: Clara, Moira Luz, Simionato, Claudia G., Jaureguizar, Andrés J.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Geofísica
SST seasonal cycle
EOF analysis
water regime areas
Southwestern Atlantic Ocean
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/142850
https://revistas.unlp.edu.ar/geoacta/article/view/13325
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-142850
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geofísica
SST seasonal cycle
EOF analysis
water regime areas
Southwestern Atlantic Ocean
spellingShingle Geofísica
SST seasonal cycle
EOF analysis
water regime areas
Southwestern Atlantic Ocean
Clara, Moira Luz
Simionato, Claudia G.
Jaureguizar, Andrés J.
Annual variability of sea surface temperature in the Northern Argentinean Continental Shelf
topic_facet Geofísica
SST seasonal cycle
EOF analysis
water regime areas
Southwestern Atlantic Ocean
description Twelve years of daily satellite data (0.1° spatial resolution) were used to study the seasonal variability of the sea surface temperature (SST) over the Northern Argentinean Continental Shelf (NACS; between 33°- 45° S and 52°- 66° W). The seasonal cycle, which includes the annual and semi-annual signals, was assessed using harmonic analysis. The annual cycle explained more than 90% of the total variance in the NACS, with SST amplitudes varying from 3.4 to 7.6° C. Largest variances values for this timescale were observed along the Argentinean coast and the inner shelf; particularly in the El Rincón region (exceeding 96%). Empirical Orthogonal Function Analysis (EOF) in S-Mode was applied to daily SST anomalies in the annual timescale, indicating that nearly 94% of its variance was explained by the first two modes, which accounted for 70 and 24% of the variance, respectively. Mode 1 prevailed most of the year with its positive phase occurring in autumn/winter and the negative in spring/summer. This mode revealed the seasonal radiative warming/cooling, related to the heating/cooling in summer/winter in most of the NACS; the shallow waters of the Río de la Plata and El Rincón were heated and cooled more and faster than deeper waters. The weakest seasonal heating/cooling occurred around Península Valdés, where vertical mixing maximizes due to tidal action. Mode 2 corresponded to early spring and early fall in their positive and negative phases, respectively. This mode was related to a transition during the early intermediate seasons when the cooling/heating of an extended coastal region connecting Península Valdés and the Río de la Plata occur.
format Articulo
Articulo
author Clara, Moira Luz
Simionato, Claudia G.
Jaureguizar, Andrés J.
author_facet Clara, Moira Luz
Simionato, Claudia G.
Jaureguizar, Andrés J.
author_sort Clara, Moira Luz
title Annual variability of sea surface temperature in the Northern Argentinean Continental Shelf
title_short Annual variability of sea surface temperature in the Northern Argentinean Continental Shelf
title_full Annual variability of sea surface temperature in the Northern Argentinean Continental Shelf
title_fullStr Annual variability of sea surface temperature in the Northern Argentinean Continental Shelf
title_full_unstemmed Annual variability of sea surface temperature in the Northern Argentinean Continental Shelf
title_sort annual variability of sea surface temperature in the northern argentinean continental shelf
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/142850
https://revistas.unlp.edu.ar/geoacta/article/view/13325
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