Variabilidad anual de la temperatura superficial del mar en la plataforma continental argentina norte
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...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/182606 |
| Acceso en línea: | http://hdl.handle.net/11336/182606 |
| Access Level: | acceso abierto |
| Palabra clave: | TEMPERATURA SUPERFICIAL DEL MAR CICLO ESTACIONAL PLATAFORMA CONTINENTAL ARGENTINA VARIABILIDAD CLIMÁTICA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
| Sumario: | 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. |
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