Premium
Impact of ENSO episodes on the autumn rainfall patterns near S˜o Paulo, Brazil
Author(s) -
de M. B. S. Xavier Teresinha,
Dias Maria A. F. Silva,
Xavier Airton F. S.
Publication year - 1995
Publication title -
international journal of climatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.58
H-Index - 166
eISSN - 1097-0088
pISSN - 0899-8418
DOI - 10.1002/joc.3370150508
Subject(s) - climatology , precipitation , el niño southern oscillation , rain gauge , geography , environmental science , period (music) , meteorology , geology , physics , acoustics
The relative rainfall intensity for autumn near the city of São Paulo, Brazil, is analysed using 89 rain‐gauge stations. Identifying monthly accumulated precipitation extremes in May for the 1935–1991 period is the main aim of this work. The results show a marked influence of strong El Niño events on the spatial organization of rainfall in the neighbourhood of São Paulo. The pattern of relative rainfall intensity shows decreasing values from the north‐west and north of the area to the south‐east and south, respectively, in strong El Niño years (mainly in May) in contrast to other patterns in other years. This result may be due to low‐level wind‐regime anomalies interacting with the topography of the region.