南疆地区地表湿润指数变化分析

The Analysis of The Earth's Surface Humidity Index change in South of Xinjiang

她表湿润指数能较客观地反映某一地区的水热平衡状况,是判断某一地区气候干旱与湿润状况的良好指标。通过计算南疆1971——2008年逐月的地表湿润指数,得出:(1)南疆湿润指数30年标准值介于0.01与0.40之间,较为干旱,尤其是在植物生长季节,湿润指数较低,对当地农作物和植被的生长发育造成一定影响;(2)南疆湿润指数30年标准值的时空分布不均,春季干旱,对春耕不利;夏季有所回升,有利于植物生长发育;(3)南疆湿润指数时空变化在短期内存在剧烈性变动;(4)湿润指数可以作为反映生态环境变化的指标,为科学合理地进行生态环境变化监测提供服务。

The Earth＇s surface humidity index is a well guide line to judge aridity or wetness of the climate in a certain area. By compute the Earth＇s surface humidity of month from 1971 to 2008, we draw the conclusion as follows： （1） The month-average humidity index, which computed by month as a climatic year from the year 1970 to 2000, was between 0. 01 and 0. 40, quite drought, especially in the plant growth season, the low humidity index have a infection to the copper and pasture in a certain degree; （2） The space-time distribution of the Earth＇s surface humidity of the climatic year in south of Xinjiang was odds, drought in spring and return partly in summer that was beneficial to plants; （3） the space-time diversity of the Earth＇s surface humidity in south of Xinjiang was sharply in a short time; （4） It can be a index of environment variety reflection, the Earth＇s surface humidity index which can offer service for the inspect of environment variety scientifically and reasonably.