厄尔尼诺事件发生前的某些气象征兆

SOME METEOROLOGICAL FORERUNNERS OF EI Nino EVENTS

选择１９５０～１９８９年期间出现的中等强度以上的厄尔尼诺和反厄尔尼诺事件，对其前期在中一西太平洋近赤道地区的某些气象条件及北半球环流特征作合成对比，分析表明两者存在明显的差异，这种差异有助于对厄尔尼诺事件发生的监测和预报。

Synthetice contrast is carried out of some of the meteorological conditions over themid-west Pacific close equatorial area and the Northern Hemispheric circulation features inthe previous period of the 1958～1985 EI Nino and anti-EI Nino events with higher thanmoderate intensity, Restilts show a sharp difference between the two,which is helpful in themonitoring and predicting of the occurrence of EI Nino.