Precipitation variability in South America from IPCC-AR4 models. Part II: Influence of SH circulation leading patterns

C. VERA; G. SILVESTRI; B. LIEBMANN; P. GONZÁLEZ

Brasil

Congreso; 8th International Conference on Southern Hemisphere Meteorology & Oceanogrphy; 2006

American Meteorological Society

The relationship between monthly mean precipitation anomalies and the three leading patterns of SH circulation variability show that most of the models reproduced the SAM influence onto precipitation variability at the southern Andes. On the other hand, just a few of them were able to reproduce the observed influence of both PSA1 and PSA2 on South American precipitation variability. The last result can be associated with model deficiencies in reproducing the ENSO cycle and its remote influence on the SH circulation variability.