1976／1977年与1982／1983年ElNino事件的大气海洋特征

根据ＮＭＣ客观分析资料进行诊断分析，揭示了１９７６／１９７７年及１９８２／１９８３年两次ＥｌＮｉｎｏ事件发生，发展的显著差异。１９７６／１９７７年事件前期东亚为弱冬季风，而１９８２／１９８３年事件前期东亚为强冬季风。

DIFFERENCE IN SEA AIR FEATURES BETWEEN 1976/1977 AND 1982/1983 El Nio EVENTS

Diagnosis has been performed of the 1976/1977 and 1982/1983 El Nio events on the basis of NMC objective analyses. Evidence shows that in the prior period to the 1976/1977 occurrence, a weak winter monsoon dominated in east Asia in contrast to a strong monsoon for the 1982/1983 event; the intensity was responsible for the distribution and vigor of paired vortices around the equatorial western Pacific and hence of equatorial Pacific westerly anomalies. Moreover, anomalies of SST, OLR and velocity potential differ greatly between the events. In the light of our study, the 1976/1977 (1982/1983) El Nio is categorized as a weak eastern (robust western) event.