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《Chinese Journal of Atmospheric Sciences》 1991-01
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ATMOSPHERIC DRYNESS INDEX IN CHINA MAINLAND AND ITS INTERANNUAL VARIATION

Jiang Jianmin(Beijing Institute of Meteorology)  
With the analysis method of the Orthogonally Rotated Principal Component (Varimax Criterion), the regional teleconnection and interannual variability of the atmospheric dryness index, in the period of 1951-1987 in China mainland were investigated.The results indicate that three correlative zones for the annual index of atmospheric dryness might be approximately partitioned by 43 ° N and 30 ° N in China, that the droughts in the north of 30 ° N of China lasted 1970-1986, and that the general trend of climatic variation was similar to that in the Sahel, the central England and the Wales areas, and the dryness index in most part of these regions has the feature of quasi biennial oscillation.
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