通过对 ENSO循环的两个不同位相中印度洋地区海表温度变化特征的分析 ,指出印度洋地区的海温变化与赤道东太平洋地区的海温变化有较好的相关关系 ,是ENSO循环的重要组成部分。对应于赤道东太平洋暖位相期 ,印度洋地区的海温分布为东冷西暖 ;与此相反 ,在赤道东太平洋冷位相期 ,印度洋地区的海温分布为东暖西冷。进一步的分析还发现 ,印度洋东、西部地区海温变化纬向差异最明显的区域位于印度洋赤道以南 0～ 2 5°S附近 ,且这种差异具有明显的年季变化特征 ,在整个夏季风期间差异较大 ,而冬季风期间较小 ,其中冷位相期间的纬向差异比暖位相期间的纬向差异大。代表印度洋纬向差异的 IDM(偶极指数 )变化与赤道东太平洋地区的海温变化有很好的正相关关系。 By analyzing the characteristics of sea surface temperature changes in the Indian Ocean in two different phases of the ENSO cycle, it is pointed out that the variation of SST in the Indian Ocean region has a good correlation with the SST in the equatorial eastern Pacific, and is an important part of the ENSO cycle . Corresponding to the warm-phase phase of the equatorial East Pacific, the distribution of SST in the Indian Ocean is warm in the east and warm in the west, whereas in the equatorial Eastern Pacific, the SST in the Indian Ocean is warm and warm in the east. Further analysis also found that the most obvious zonal difference of sea temperature in the east and west of the Indian Ocean is located near 0 ~ 25 ° S south of the Indian Ocean equator, and this difference has obvious characteristics of annual variation. During the whole summer monsoon period The difference is larger and the winter monsoon period is smaller, in which the latitudinal difference during the cold phase is larger than the latitudinal difference during the warm phase. The IDM (dipole index), which represents the zonal difference in the Indian Ocean, has a good positive correlation with the SST in the equatorial eastern Pacific.