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利用奇异值分解法（ＳＶＤ） 分析了云南２１ 个站各月降水距平与北太平洋海温的相关关系，得到了奇异向量，对贡献最大的前２ 个奇异向量进行分析，结果表明∶①平均意义上，秋冬季海温与云南各月降水存在显著的相关关系；②秋冬季热带东太平洋海温对翌年春末盛夏云南中部地区的降水有显著的影响；③秋冬季的热带中东太平洋海温与前一年春末和盛夏降水也存在明显的相关关系．
Using SVD (Singular Value Decomposition) method, the correlations between the monthly precipitation anomalies at 21 stations in Yunnan and the SST over the North Pacific Ocean are analyzed. The singular vectors are obtained and the first two singular vectors with the largest contributions are analyzed. The results show that: In the sense, there is a significant correlation between SST in autumn and winter and precipitation in each month in Yunnan. (2) SST in autumn and winter have a significant influence on the precipitation in the middle of Yunnan in the mid-spring of next spring. SST There is also a clear correlation between the end of spring and summer precipitation in the previous year.