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El Niño/La Niña relationship with rainfall at Huancayo, in the Peruvian Andes
Author(s) -
Kane R.P.
Publication year - 2000
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/(sici)1097-0088(200001)20:1<63::aid-joc447>3.0.co;2-j
Subject(s) - wet season , climatology , el niño southern oscillation , environmental science , climate extremes , geography , geology , precipitation , meteorology , cartography
The major rainy season at Huancayo (central Peruvian Andes) is in the months DJFM (December–March). For years when El Niños were active during these months, two types of effects were noticed. Either there were rainfall deficits in the DJF months, or there were excess rains in DJ, followed and preceded by deficit rains for a month or two. When El Niños were active in other months, the non‐rainy season rainfall at Huancayo was sometimes far above average. During years of La Niña (Anti‐El Niños), there were often excess rains, in both the rainy and the non‐rainy seasons. In coastal Peru, heavy rainfall is considered as one of the criteria for identifying an El Niño. If true, the rainfall patterns at Huancayo are different from those of coastal Peru. In the recent El Niño of 1997, southern Peru had droughts while eastern and northern Peru, Ecuador had floods. The ENSO relationships in different parts of Peru are probably different and need detailed investigation. Copyright © 2000 Royal Meteorological Society