El Niño affected by global warming(d an abrupt change around 1820 in the EN...)

Date:12/20/2007

d an abrupt change, around 1820, in the ENSO system along Pacific seaboard of South America. Since the beginning of the XIXth Century, in other words the final phase of the Little Ice Age, the characteristic feature of El Nio events was abnormal rainfall, both in central Chile during the southern winter and on the northern coast of Peru during the subsequent southern summer.

These results as a whole emphasize the complexity of the interactions at work between the global-scale climate changes, the diverse behaviour of the ENSO system and regional climate changes. It remains to be determined if the extreme intensity of the two events which occurred at the end of the XXth Century, in 1982-1983, then in 1997-1998, is effectively linked to recent intensification of global warming. If that turned out to be the case, the El Nio phenomenon could become more and more intense and destructive, not only on the South American coasts, but also in other regions of the world.

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Contact: Gregory Flechet fichesactu@paris.ird.fr 33-014-803-7607 Institut de Recherche Pour le Dveloppement Source:Eurekalert

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