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中文摘要：
基于华南地区1961—2007年66个气象台站的地面观测资料,对华南地区全年及温度生长期内热量、光照和水分的时空变化特征进行了分析.结果表明：1961—2007年,华南地区年均气温以0.20℃·（10 a）^-1的趋势上升,温度生长期内积温的气候倾向率[平均为98℃·d·（10 a）^-1]由北向南递增;1981—2007年,6200～7500℃·d和7500～8000℃.d积温带面积分别较1961—1980年增加了1.5×10^4和4.7×10^4 km^2.研究期间,华南地区全年和温度生长期日照时数分别以-57和-38 h·（10 a）^-1的速率递减;与1961—1980年相比,1981—2007年全年和温度生长期内≥1800 h日照时数的区域面积均呈减少趋势.全年和温度生长期降水量均呈略微增加趋势,但不同地区的增减幅度明显不同.全年及温度生长期分别有62%和52%站点参考作物蒸散量的气候倾向率为负值;与1961—1980年相比,1981—2007年全年和温度生长期参考作物蒸散量均表现为高值区缩小、低值区扩大.全年湿润指数的平均气候倾向率为0.01·（10 a）^-1,70%站点的年湿润指数呈上升趋势;与1961—1980年相比,1981—2007年温度生长期内湿润指数增加了0.02,53%站点的气候倾向率为正值.研究期间华南地区气候变化总体表现为暖湿趋势,这将对该地区作物种植制度、作物产量和农业结构等产生影响.
英文摘要：
By using the 1961-2007 daily weather data from 66 meteorological stations all over South China,this paper studied the spatiotemporal change characteristics of agricultural climate resources,including heat,light,and precipitation,in this region on the scales of whole year and temperature-defined growth season.In 1961-2007,the mean annual air temperature in this region tended to be increased by 0.20 ℃·（ 10 a）^-1,and the climatic trend of ≥10 ℃ accumulated temperature in temperature-defined growth season increased gradually from north to south,with an average of 98 ℃·d·（ 10 a）^-1.Comparied with those in 1961-1980,the areas of the accumulated temperature zone of 6200-7500 ℃·d and 7500-8000 ℃·d in 1981-2007 increased by 1.5 × 10^4 and 4.7 × 10^4 km2,respectively.In 1961-2007,the sunshine hours on the scales of whole year and temperature-defined growth season decreased by-57 h·（ 10 a）-1 and-38 h·（ 10 a）^-1,respectively,and the areas with sunshine hour ≥1800 h on the two scales tended to be decreased,compared with those in 1961-1980.The precipitation on the two scales increased slightly,and the increment varied obviously in different parts of the region.There were 62% and 52% of the stations where the reference crop evapotranspiration on the scales of whole year and temperaturedefined growth season was in negative,respectively.In 1981-2007,the high-value area of refer-ence crop evapotranspiration decreased,while the low-value area increased,compared with those in 1961-1980.The mean climatic trend of annual humidity index was 0.01·（ 10 a）^-1,and 70% of the stations showed an increasing trend.Comparing with that in 1961-1980,the humidity index on the scale of temperature-defined growth season in 1981-2007 was increased by 0.02,with 53% of the stations showed positive.On the whole,the change characteristics of climate in South China in 1961-2007 showed a tendency of warming and wetting,which would impact the cropping system,yield,and agricultural structure in the region.
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