利用气象台站常规资料的欧氏距离指标估算梨园冠层露情

利用气象台站正点观测的气温、露点、相对湿度、云量和风速，组成状态向量，通过计算不同天气状态下状态向量间的欧氐距离，获得指标，从而估算附近梨园露的生消状况。这种露的估算方法简便、直观，效果稳定，测报范围较大。在梨冠层露情露时测报的二年应用中，露时误差在２ｈ以内，露情轻重与实际相吻合。

Estimating the Dew Duration in Pear Tree Canopy Using Mathematical Distance Method and Standard Weather Station Data

A method for estimating the dew duration in pear tree canopy is reported in this paper.It predictsthe dew conditions through the mathematical distancee among diffferent weather vectors compused ofair temperature,dew ,point,relative humidity,cluud amount and wind speed recorded at fixed timeeach day by the standard weather station. This method is simple and reliable and gives a good referenceto the standard weather stations to estimate the dew conditions of surounding crop canopy in largearca.