Open AccessOn the South Atlantic Convergence Zone affecting southern Amazonia in austral summer
Author(s) -
de Oliveira Vieira Samuel,
Satyamurty Prakki,
Andreoli Rita Valeria
Publication year - 2013
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl2.401
Subject(s) - climatology , convergence zone , amazon rainforest , tropical atlantic , period (music) , precipitation , structural basin , amazon basin , geology , geography , oceanography , environmental science , meteorology , sea surface temperature , geomorphology , ecology , physics , acoustics , biology
Time series analysis of the average rainfall over a target area in southern Amazon Basin showed a spectral peak at 11 day period. An objective method for defining the South Atlantic Convergence Zone (SACZ) is used to identify 28 episodes affecting southern Amazon Basin during the 10 summers in the period 1999–2010. The 28‐episode composite precipitation anomalies show significant positive values over the target area. The convergence of moisture over the target area in the SACZ composites is about 35% stronger than the climatological value. Copyright © 2012 Royal Meteorological Society