关键词: 重庆, 气候变化, 降水量, 降水日数, 气温

Abstract: Based on the meteorological data of mean annual precipitation,rain day and air temperature of 34 meteorological stations in 1960-2005,the characteristics of climate change in Chongqing in the recent 46 years was studied,by using linear-trend estimate,Wavelet analysis and Mann-Kendall catastrophe test.The results indicated that the precipitation decreased faintly and broke out in 1984.The main period oscillation of precipitation was 2-3 years.There was a pluvial period in 1980s and a rare rain period in 1990s.The period oscillation of the rain day was 2-4 years.The rain day showed a linear decreased trend significantly.The year of the rare rain day was more after 1984 than that before.The mean annual temperature increased faintly in the recent 46 years.There was a cooler period in 1980s and a warmer period at the beginning of the 21st century.The mean temperature increased by 0.4℃ compared to the mean annual temperature.The inter-decade change between the precipitation and air temperature existed a corresponding relationship,for example,it was a pluvial and cooler period in 1980s,while it was a rare rain and warmer period at the beginning of the 21st century.

Key words: Chongqing city, Chongqing city, Climate change, Precipitation, Rain day, Air temperature