CLIMATOLOGY OF 1000 HPA WEATHER TYPE CIRCULATIONS IN SOUTHERN SOUTH AMERICA. ASSOCIATION WITH RAINFALL EPISODES

BETTOLLI ML, PENALBA, OC; VARGAS, WM.

Foz de iguazu

Conferencia; 8th International Conference on Southern Hemisphere Meteorology and Oceanography Society; 2006

Climate variations have significant economic and social consequences, particularly in regions with an important world agricultural production. The aim of this work is to advance towards the objective identification of weather type circulations (WT) in the South American sector and analyze their main characteristics, frequency, distribution and temporal variability during the period when major precipitations in central-eastern Argentina occur (October to May). An objective classification of daily surface circulation fields is proposed by using a long database in order to relate these weather types to rainfall episodes in the argentine Pampas region.