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当前位置: 首页 > 文章 > 重庆地区参考作物蒸散时空特征与气候影响因子 节水灌溉 2012 (10) 10-14
Position: Home > Articles > Spatial-temporal Characteristics of Reference Crop Evapotranspiration and Climatic Influence Factors in Chongqing Water Saving Irrigation 2012 (10) 10-14

重庆地区参考作物蒸散时空特征与气候影响因子

作  者：
罗孳孳;阳园燕;杨世琦;唐红玉
单  位：
重庆市气象科学研究所;青海省气象台
关键词：
参考作物蒸散;Penman-Monteith公式;气候影响因子;重庆地区
摘  要：
利用重庆地区34个气象站1961-2009年逐日气象资料,采用Penman-Monteith公式计算了参考作物蒸散量(ET0),并通过GIS空间插值、气候倾向率、Mann-Kendall突变检验等方法,分析了重庆地区ET0的时空变化特征及其气候影响因子。结果表明:在空间分布上,重庆地区参考作物蒸散具有明显的区域差异,总体表现为:自西向东北方向增加,向东南方向减少。年内ET0主要受日照与气温的影响,其变化曲线呈单峰型。49年以来,重庆地区年均与春、夏、冬3季ET0均呈显著下降趋势,秋季的变化特征不明显,日照与风速的显著减小是造成重庆地区ET0呈下降趋势的主要原因。
译  名：
Spatial-temporal Characteristics of Reference Crop Evapotranspiration and Climatic Influence Factors in Chongqing
作  者：
LUO Zi-zi1,YANG Yuan-yan1,YANG Shi-qi1,TANG Hong-yu2(1.Chongqing Institute of Metrological Sciences,Chongqing 401147,China; 2.Climate Center of Chongqing Municipality,Chongqing 401147,China)
关键词：
Reference crop evapotranspiration;Penman-Monteith equation;Climatic influence factors;Chongqing municipality
摘  要：
Based on the daily meteorological data of 34 meteorological stations in Chongqing from 1961 to 2009,the reference evapotranspiration(ET0) was estimated using the Penman-Monteith equation.The spatial-temporal characteristics of ET0 and climatic influence factors were analyzed by the methods of the spatial interpolation in GIS,Mann-Kendall test,and the inclination rat analysis.The results showed that spatially,the reference crop evapotranspiration appeared as geographical difference obviously,which exhibited a gradual increment from west to northeast and decrement from west to southeast.Mean average ET0 appeared a curve with one single peak and the climatic influence factors were the hours of sunshine and air temperature.In the past 49 years,the annual ET0 and the ET0 in spring,summer and winter had significant drop trends.But the trend of ET0 in autumn was not obvious.The decrease of sunshine and wind was the cause of the significant drop trend of ET0.

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