辽宁西部干旱区蒸发量变化特征分析  

The Analysis of Evaporation Characteristics of Western Liaoning Arid Area

作　　者：梁群[1] 张国林[1] 周广学[1] 

机构地区：[1]辽宁省朝阳市气象局,辽宁朝阳122000

出　　处：《中国农学通报》2012年第35期286-290,共5页Chinese Agricultural Science Bulletin

基　　金：科技部农业科技成果转化资金项目"农田土壤含水量监测预报技术推广应用"(05ESN217400412)

摘　　要：为了给水资源的合理开发利用提供科学依据和气候变化背景,利用辽宁西部地区近58年气象资料,采用线性变化率及相关分析方法,研究蒸发量变化特征和影响蒸发量的主要气候因子。结果表明:蒸发量的变化表现为明显的下降趋势。其中,年蒸发量气候变化率为-110.54mm/10a,在58年间蒸发量趋势减少641mm;春季、夏季和秋季蒸发量气候变化率分别为-45.92mm/10a、-47.98mm/10a、-14.76mm/10a,近58年蒸发量趋势减少为266mm、278mm、86mm;冬季呈微弱的下降趋势。蒸发量变化受多因素的影响,日照时数、气温日较差、风速、相对湿度、水汽压、最低气温相关显著,而日照时数的变化则是影响辽西地区蒸发减少的最主要气候因子。In order to provide the scientific basis and background of climate change to the rational development of water resources use, the author analyzed the trends and impacts of evaporation of main climate factors in Chaoyang by using linear correlation analysis method and meteorological data during nearly 58 years were used. The result showed that： the trends in evaporation were significant decreased, the annual evaporation rate was-110.54 mm/10 a and the evaporation decreased 641 mm during 58 years. The climate change evaporation rates in spring, summer and autumn were -45.92 mm/10 a, -47.98 mm/10 a and -14.76 mm/10 a, respectively. And the evaporation decreased in spring, summer and autumn were 266 mm, 278 mm and 86 mm, respectively. The changes in winter were shown a slight decreased trend. The change of evapotranspiration was affected by many factors, such as diurnal temperature range, sunshine duration, wind speed, relative humidity, vapor pressure and minimum temperature. The thermodynamic factors of sunshine hours, diurnal temperature and minimum temperature were closely correlated with wind speed and evaporation.

关 键 词：蒸发量 气候因子 变化率 相关系数 

分 类 号：P332.2[天文地球—水文科学]