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WANG Xiao rui, FANG Rong (The Meteorological Centre of Anhui, 230061, HeFei, Anhui, China)  
A wavelet transform was applied to analyse the annual precipitation of Anhui northern area. We found that the precipitation of this area can be separated into 6 periods in the last 50 years. And,which with more or less periods in relation to different time scales. Then by using wavelet variance analysis, it is indicated that 2 or 6 years are dominant oscillation periods for annual precipitation.Finally, the drought trend was expected to maintain in future, but the precipitation positive anomaly will be at 1999 year in this area.
【CateGory Index】: P426.6
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