Drought and its Circulation Features in Shaanxi Province

Shaanxi province drought months in recent years were analysed by examining the atmosphere general circulation features, drought index S and the signal-to-noise ratio. The results show that the general circulation of Shaanxi drought can be divided into three patterns:the stabilization of East Asian long wave trough,the dominance of west pacific subtropical high and the persistence of Tibetan high. The drought associated with the East Asian long wave trough is the most serious.

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