El Ni�o/La Ni�a relationship with rainfall at Huancayo, in the Peruvian Andes

✍ Scribed by Kane, R.P.

• Book ID: 101226458
• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 197 KB
• Volume: 20
• Category: Article
• ISSN: 0899-8418
• DOI: 10.1002/(sici)1097-0088(200001)20:1<63::aid-joc447>3.0.co;2-j

✦ Synopsis

The major rainy season at Huancayo (central Peruvian Andes) is in the months DJFM (December -March). For years when El Nin ˜os 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 Nin ˜os were active in other months, the non-rainy season rainfall at Huancayo was sometimes far above average. During years of La Nin ˜a (Anti-El Nin ˜os), 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 Nin ˜o. If true, the rainfall patterns at Huancayo are different from those of coastal Peru. In the recent El Nin ˜o 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.