【摘要】 参考作物蒸散量是表征大气蒸散能力,评价气候干旱程度、植被耗水量的重要指标。本文根据新疆塔里木盆地周边绿洲区的5个典型气象站近50余年的逐日气象资料,采用PM公式计算各站生育期ET0,使用经典统计学理论、气候倾向率及Mann-Kendall非参数法,对研究区生育期ET0时空变化特征进行分析。结果表明:不同区域的年生育期ET0数据均服从正态分布规律,且其变异系数相差不大,均属于中等偏弱程度变异;对不同站点ET0多年均值进行显著性检验,喀什站与和田站、阿克苏站ET0多年均值无显著差异,其他站点之间ET0多年均值存在显著性差异;塔里木盆地北缘与西南缘绿洲生育期ET0通过了时间序列MK趋势检验,递减值分别为-3.23、-2.07与-2.76mm/a。更多还原

【Abstract】 ET0 is the characterization of atmospheric evapotranspiration ability and an important index for evaluating the degree of drought climate,vegetation water consumption.In this paper,according to the data of 5typical meteorological stations surrounding Tarim basin oasis area in recent 50 years,the PM formula is used to calculate the ET0,then the classical statistical theory,climate tendency rate and Mann-Kendall non-parametric method are used to analyze the ET0temporal-spatial variation characteristics.The results show that ET0 in different regions obeys normal distribution,and the variation coefficient is small and belongs to weak medium degree variation;the ET0 values of Kashgar Station,Aksu Station and Hetian station have no significant difference,while those of other stations have significant difference;the northern margin and southwest margin of oasis have passed the MK tests with the decreasing value of-3.23,-2.07and-2.76mm/a,respectively.更多还原