RETRACTED: Multi-scale Characteristic and Mutation Analysis of Precipitation and Evaporation Series in Yuyang (Retracted Article)

According to precipitation and evaporation time series in Yuyang region, this paper adopts Morlet wavelet analysis method, analyzes time series configuration in detail, and discusses multi-scale variations and mutation of precipitation and evaporation. The result shows that, precipitation and evaporation series exist multi-scale characteristic, the main period is 16y and 15y, secondary period is 3y, 7y, and 9y. Period changes complicatedly, large scale comprises small scale; oscillation point of a=16y and a=15y delays 3 similar to 4y compared with a=9y; precipitation oscillation point delays 1y compared with evaporation; in deferent time scale oscillation point is deferent comparison with evaporation, precipitation oscillation point appearance in the Late 1980s and 1990s, evaporation time series oscillation point appearance in Mid 1980s and Mid and Late 1990s. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of the Organizers of 2011 International Conference on Energy and Environmental Science.