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作者之一首先在1988年指出E1 Nino事件的前期征兆在赤道西太平洋,其后的进一步研究更明确指出,东亚冬季风异常与El Nino有相互作用.通过资料分析和GCM的数值模拟,我们最近又指出热带大气季节内振荡与El Nino也存在明显的相互作用.1 观测资料分析结果就时间尺度而论,我们可以将热带大气运动大致分为三类系统,即天气尺度(3～10d)系统,主要是大范围积云对流的活动;低频系统,主要是季节内(30～60d)振荡;准定常(>90d)系统,包括ENSO循环.1982～1983年及1986～1987年分别发生了El Nino事件,用ECMWF
One of the authors first pointed out in 1988 that the early signs of the E1 Nino event were in the western equatorial Pacific and further studies later made it more clear that the East Asian winter monsoon anomaly interacts with El Nino.We recently analyzed the data and GCM numerical simulations, It is also pointed out that the intraseasonal oscillations of the tropical atmosphere also have obvious interactions with El Nino.1 Results of Observation Data Analysis On the time scale, we can roughly classify the tropical atmospheric movement into three types of systems: the weather scale (3 ~ 10d) , Mainly cumulus cloud convection activities; low-frequency system, mainly in the season (30 ~ 60d) oscillation; quasi-regular (> 90d) system, including the ENSO cycle .1982 ~ 1983 and 1986 ~ 1987 were the occurrence of El Nino event, with ECMWF