湖北省空中水资源分析

A Climatic Research of Cloud-water Resources in Hubei Province

利用湖北省77站地面大气水汽压资料,计算了湖北省整层大气可降水量,分析了湖北省整层大气年、季平均可降水量的时空分布特征以及湖北省整层大气可降水量与地面降水的关系,发现夏季是湖北省整层大气可降水量最高的一个季节,而从时间分布上看,湖北省自然致雨的概率以春季为最高;从空间分布上看,湖北省自然致雨的概率以鄂西南为最高。通过多雨年与少雨年比较,认为少雨年与多雨年的差异,空中水汽含量偏少是一个方面,但不是主要方面,主要是由于成雨的概率不高。多雨年降雨系统较强,且非常稳定,容易出现连续性降水,系统之间配合较好,利于水汽辐合成雨,少雨年与之相反,但仍有可开发的降雨时段,仍具有开发前景。

Surface air pressure data from 77 observe station of Hubei Province are used to calculate potential precipitation of all lays over Hubei provi＇nce and analyze the spatial-temporal characteristic of annual average,seasonal average potential precipitation and the relation of surface precipitation and air potential precipitation. The result shows potential precipitation of all lays in summer is most, and natural precipitation efficiency is most in spring in southwest in Hubei Province. Comparing with air water vapor content and weather system of rainy year and rainless year. On the one side air water vapor content is less in rainless year, on the other hand weather systems is mainly reason. Because main weather systems of rainy year is stable and is easy to result in continuous precipitation. That of rainless year is opposing. But the water vapor resources in rainless year over Hubei Province still have precipitation stage and great potentialities to be exploited .