Wavelet analysis of interannual variation of tropical cyclones in guangdong

摘要

Climatological laws are studied for the annual frequency of tropical cyclone occurrence and the date of the yearly first landfall, which take place in the Guangdong province or pose serious threats on it from 1951 to 1999, using the data in the Yearly book on typhoons. A new method that has developed over recent years for the study of temporal sequences, the wavelet analysis, is used, in addition to more common statistical ap- proaches. By analyzing two wavelet functions, MHAT and MORLET, we have compared the results of transfor- mation of the wavelets provided that other conditions remain unchanged.