Abstract:A high pressure system between 20 • S and 35 • S, moving from east to west, passed over the Andes mountains on 27 and 28 February 1997. Some days earlier, on 20 February, another centre of anticyclonic vorticity had moved westward without crossing the Andes. These events developed during a South American Seesaw System (SASS) event that had been displaced southward from its climatological position.This southward displacement of the local circulation pattern was accompanied by intense convective activity during … Show more
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