Variation of Temperature and Precipitation in Chouzhou City during 1961~2013

doi:10.11924/j.issn.1000-6850.casb15070098

Abstract

Abstract: In order to investigate variation of precipitation and temperature in Chouzho City during 1961- 2013, based on the methods of trend analysis, Mann-Kendall non parametric test and wavelet analysis, the inter-annual, inter-decadal and seasonal variation of temperature and precipitation in Chouzhou City were analyzed. The results indicated that the annual and seasonal temperature exhibited a significantly increasing trend with the rate of 0.26℃/10 a. (1) The increasing trend of temperature was the strongest in spring, strong in winter and autumn, slighter in summer. Obviously, the annual precipitation also exhibited a significantly increasing trend with the rate of 15.60 mm/10 a, the precipitation in summer and winter exhibited an increasing trend, whereas, the precipitation in spring and autu mn exhibited a decreasing trend. (2) The annual temperature had an abrupt increase in 2001, and the annual precipitation had an abrupt increase in 1986. Wavelet analysis indicated that the annual temperature had a 17- year periodic cycle and the annual precipitation had a 17-year primary periodic cycle and a secondary periodic cycle of 7-8 years. (3) Cross wavelet analysis indicated that the annual precipitation had a significantly negative correlation with annual temperature. The temperature and precipitation in Chuzhou City all presented the increasing trend under the global climate change.

CLC Number:

P462

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