Abstract:

Based on the weather data from 34 meteorological stations in Chongqing during 19612010,and by using statistical methods and inverse distance weighted interpolation(IDW)，the changing characteristics of agricultural climate resources were analyzed.The agricultural climate resources included yearly average temperature,temperaturedefined growing period mean temperature,≥10℃ accumulated temperature,precipitation and sunshine hours.The results indicated that the annual mean temperature in Chongqing showed an overall increase slowly during 19612010,and the growing rate was 037℃/10 a.≥10℃ accumulated temperature showed increasing trends in temperaturedefined growing period,the mean growing rate was 1162℃/10 a,and the increasing trend was obvious in the eastnortheast region.The annual precipitation and the precipitation in temperaturedefined growing period decreased gradually from southeast to northwest,the average decreasing trend were 1972 mm/10 a and 1185 mm/10 a,respectively.The sunshine hours of the annual and temperaturedefined growing period within about 90% meteorological stations decreased,and the decreasing trend was more significant in west region than that in east region