Wavelet analysis on inter-annual variation of precipitation in Guangdong, China

摘要

This paper deals with the inter-annual variations of annual precipitation in Guangdong Province, China, By means of Morlet wavelet analysis, the paper reveals the existing period and mutation year of annual precipitation series from 1956 to 2000 for the whole province. It is found that annual precipitation variation of the province mainly falls into the time scales of 10 years, 4 years and 5 years, of which the 10-year period is the most noticeable The results are compared with those obtained by traditional power spectral analysis. Both methods, the wavelet analysis used here and traditional power spectral analysis by the Guangdong Hydrology Bureau, obtain the same 10-year period of annual precipitation series in Guangdong Province.