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根据辽西半干旱区阜新、朝阳站上世纪50年代至今的气象资料,采用FAO推荐的Penm an-Monte ith公式计算参考作物潜在腾发量(ET0),统计并分析生长季与非生长季辽西地区的ET0、气象因子变化与及其影响ET0变化的主要气象因子。结果表明:阜新地区ET0表现为随时间的增长趋势,而朝阳表现为随时间逐年减少趋势,80年代至今阜新、朝阳变化趋势显著。阜新、朝阳ET0与各气象因子的相关性大体一致。在辽西地区影响ET0显著的气象因子顺序为:风速>太阳辐射>最高温度>降水量,20世纪80年代至今风速的显著性变化是辽西半干旱区ET0之间差异的主要原因。
According to the meteorological data of Fuxin and Chaoyang stations in the semi-arid areas of western Liaoning from the 1950s to the present day, the reference crop potential evapotranspiration (ET0) was calculated using the Penm an-Monteith formula recommended by the FAO, and statistical and analysis of the growing season and non-growing season western Liaoning Of ET0, the change of meteorological factors and their main meteorological factors that affect the change of ET0. The results showed that ET0 in Fuxin area showed a trend of increasing with time while Chaoyang showed a trend of decreasing year by year, and significant changes occurred in Fuxin and Chaoyang from the 1980s to the present. Fuxin, Chaoyang ET0 and the correlation between the meteorological factors are generally the same. The order of meteorological factors influencing ET0 in western Liaoning is as follows: wind speed> solar radiation> maximum temperature> precipitation. The significant change of wind speed from 1980s to present is the main reason for the difference of ET0 in western Liaoning.