Analyses on Climate Characteristic and Variation Rule of Rainstorm in Ningxia in Recent 44 Years

DING Yong-hong;WANG Wen;CHEN Xiao-guang;ZHENG Guang-fen;SHAO Jian;JI Xiao-ling

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Plateau Meteorology ›› 2007, Vol. 26 ›› Issue (3) : 630-636.

Analyses on Climate Characteristic and Variation Rule of Rainstorm in Ningxia in Recent 44 Years

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Abstract

By selecting the meteorological observed data of 24 stations in Ningxia and using the methods of resultant,Lepage test and Mexihat wavelet,the climate characteristics,the rules of interannual and interdecadal changes,the abrupt and period of rainstorm occurring in Ningxia were analyzed.The analyzed result shows that: after the 1990's,although there was extreme climate event of rainstorm,the climate characteristics of rainstorm in Ningxia didn't obviously change,meanwhile it exist the new features of beginning earlier,ending latter,obviously reduced in main flood season and increased in middle-east regions.There is the rules of interannual and interdecadal changes,and it has unconspicuous descend trend in the whole.Except for two years that could be considered abrupt not very significant in July 1972 and 1994,there were no other abrupt years.It also has period and quasi-period change characteristics in July,August and flood season in different time scales.

Key words

Ningxia / Rainstorm / Climate characterist / Lepage test / Mexihat wavelet anal

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DING Yong-hong , WANG Wen , CHEN Xiao-guang , ZHENG Guang-fen , SHAO Jian , JI Xiao-ling. Analyses on Climate Characteristic and Variation Rule of Rainstorm in Ningxia in Recent 44 Years. Plateau Meteorology. 2007, 26(3): 630-636

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