抚顺地区参考作物需水量与气候变化的关系分析

Correlation of Climate Chang and the Reference Crop Evaportranspiration

根据抚顺地区3个气象站1995-2004年的气象资料，应用FAO推荐的Penman-Monteith公式计算了10年来每年（5-9月）各月的参考作物需水量ETo，分析了ETo的月际变化和年际变化特征。抚顺地区的ETo月际和年际变化都较大，但ETo的变化趋势十分相似。同时分析了各气象因素对ETo的影响，对清源气象站的年均ETo的影响较大的气象因素是：最高气温（Tmax）、相对湿度（RH）、实测风速（U）以及日照时数（H），其中相对湿度（RH）与ETo呈负相关性；对章党气象站的年均ETo的影响较大的气象因素是：相对湿度（RH）和日照时数（H），其中相对湿度（RH）与ETo呈负相关性；对新宾气象站的年均ETo影响较大的气象因素是：大气压（P）和日照时数（H），与ETo均呈负相关性。日照时数（H）是影响抚顺地区参考作物需水量ETo最主要因素。抚顺地区ETo空间变化也较大，从山区到绿洲平原ETo多年平均值呈递增趋势，ETo与海拔高度呈显著负相关。

Based on the meteorogical data collected from three weather stations in recent 10 years in Funshun region, the crop evapotranspiration （ETo） was calculated with the Penman-Monteith equation recommended by FAO. The change characteristics of monthly and annual ETo were analyzed. The differences of monthly and annual ETo were very much, but the change trend of monthly and annual ETo was quite resemble. The impacts of climate factors on the crop evaportanspiration were analyzed.The Tmax, RH, H and U impacted greatly on the ETo in the Qingyuan station. Spatial variation of ETo values was obvious and the value was increasing from mountainous area to plain in Fushun Region.