Wednesday, 29 August 2007 - 11:50 AM
3.A.B-6
Sea ice concentration temporal variability over the Weddell Sea and its relationship with Tropical Sea Surface Temperature
Sandra Barreira, Argentine Navy Meteorological Service, Comodoro Py 2055 - piso 15, Ciudad Autónoma de Buenos Aires, 1104, Argentina and Rosa Compagnuccci, Ciencias de la Atmósfera y los Océanos, Universidad de Buenos Aires - Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón II - piso 2, Ciudad Autónoma de Buenos Aires, Argentina.
Principal Components Analysis in S-Mode was performed on monthly sea ice concentration anomalies (SICA) series. Five temporal patterns represent the SICA temporal variability in the Weddell between 1979 and 2000. The 1st temporal pattern series has its homogeneous area located at the north of Weddell Sea . The 2nd region is centered in 30°W, southeast of the Weddell. The 3rd is localized east of 30°W and north of 60°S. The 4th PC series has its homogenous region at the west of the Weddell Sea . The 5th area is centered at 0° W and south of 60°S. Correlation charts between the five Principal Components (PC) series and SST were performed. Positive correlations over the Tropical Pacific Ocean were found for the five PCs when SST series preceded SICA PC series. This correlation sign relates the occurrence of ENSO warm (cold) event with posterior positive (negative) anomalies of SICA over the Weddell Sea .