7.10
South Atlantic variabitility and the relationship with other global features in a coupled ocean-atmosphere model
Edmo J.D. Campos, University of Sao Paulo, Sao Paulo, Sao Paulo, Brazil; and R. A. F. de Almeida, R. J. Haarsma, and R. Bleck
An investigation of variability in the South Atlantic is being carried out with the output of a coupled ocean-atmosphere model (MICOM and NCAR/CCM3) run at the Los Alamos National Laboratory (LANL). The main objective is a search for patterns of coupled variability in the South Atlantic and the relationship with other better known features such as the ITCZ, ENSO and NAO. Output of two main experiments are analyzed. One is a fully coupled global ocean-atmosphere system and the other considers exclusively the ocean, forced by climatological data. Results of analyses of SST based on the use Empirical Orthogonal Functions (EOF) and Singular Value Decomposition (SVD) suggest the connection of the South Atlantic structures with larger (Atlantic) scales as already pointed out in the literature. Indication of seasonal teleconnections and possible influence of the overturning current, which might drive some of the observed South Atlantic's patterns are also inferred from the analyses. These results came from an ongoing work and might certainly change directions during the research process. However, insights of the future results are promising and strong enough to possibly contribute to the actual knowledge of the South Atlantic variabilities and their relations with already known oscillations such as NAO or ENSO.
Session 7, The Southern Hemisphere oceans and the cryosphere
Tuesday, 25 March 2003, 1:30 PM-5:15 PM
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