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Geoacta

On-line version ISSN 1852-7744

Abstract

BERMAN, Ana Laura; COMPAGNUCCI, Rosa  and  SILVESTRI, Gabriel. Co-variabilidad de la temperatura superficial del mar entre cuencas del Hemisferio Sur. Geoacta [online]. 2011, vol.36, n.2, pp. 97-111. ISSN 1852-7744.

Relations among different regions of the Southern Hemisphere oceans in the whole time-frequency space during the last fifty years are studied applying the methodology of Wavelet Coherence Analysis to annual means of monthly anomalies of sea surface temperature. Among the most relevant results, it must be mentioned that the western and central regions of the tropical Pacific have a close relation in oscillations shorter than 8 years and in oscillations around 12 years but important disconnections are detected in the rest of the space of frequencies. Moreover, the relation among the western and eastern regions of the tropical Pacific is significant only in oscillations shorter than 8 years with a clear interruption during the 1980s. Important connections in interdecadal oscillations are detected among the western and central regions of the subtropical Pacific. Significant relations in a wide range of frequencies among the western and, specially, among the tropical regions of the Atlantic Ocean are found. In the Indian Ocean, the relations among subtropical areas in decadal and interdecadal scales are the only ones important. The analysis also reveals strong connections among the three oceanic basins in different bands of frequencies.

Keywords : Wavelet Coherence analysis; Southern Hemisphere teleconnections; Climatic variability.

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