ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 33 Issue 12 > 2007,33(12):39-45. DOI:10.7519/j.issn.1000-0526.2007.12.006 Prev Next
Wavelet Analysis of Variation of Rainstorm Days in Guangxi in Recent 50 Years
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Abstract:
Based on the analysis of interannual variation of rainstorm and heavy rainstor m days in Guangxi from 1951 to 2005 with the Morlet wavelet method, it shows tha t both exist significant periodic oscillations, with strong 2, 4, 8,14ye ar periods and 2year period as the strongest. Moreover, the distributions of t he frequencies and intensities are so different that the shortperiod oscillati ons are stronger than the longer ones. The rainstorm days in Guangxi exhibit an increasing tendency on a longterm basis. There are four main synoptic systems that influence the occurrence of Guangxi rainstorm: tropical cyclone, southwest vortex, lowlevel jet and uppertroposphere trough, and the main influencing s ystem contributing to the excessive rainstorm in Guangxi is tropical cyclone and southwest vortex.
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