近50年重庆市农业气候资源变化特征分析

利用1960~2010年重庆34个气象台站的气象资料，运用统计学方法、IDW插值法分析了重庆市全年及温度生长期的平均气温、≥10℃积温、降水量和日照时数等农业气象资源的时空变化特征。结果表明：研究期内，重庆市年平均气温总体呈缓慢上升趋势，增幅为037℃/10 a，温度生长期内≥10℃积温亦呈上升趋势，平均增速为1162℃/10 a，以东北部偏东地区增加趋势尤为明显；全市年降水量和温度生长期内降水量均呈东南向西北逐渐减少态势，平均下降速率分别为1972 mm/10 a和1185 mm/10 a；约90%的站点年均日照时数和温度生长期内日照时数均呈减少趋势，且西部减少的趋势较东部更加显著

ANALYSIS OF CHANGING CHARACTERISTICS OF AGRICULTURAL CLIMATE RESOURCES OVER 50 YEARS IN CHONGQING

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