by using surface data from 1951 to 1996, the long term change trend index of annual and seasonal precipitation of china is calculated.
利用1951年至1996年地面气象记录资料,计算了我国全年和季节降水量长期变化趋势特征指数。
the results showed that annual and seasonal precipitation and relative air humidity all took on an evident downtrend , more prominent in summer and autumn.
结果表明:年降水量、季节降水量、年空气相对湿度和季节相对湿度均呈明显下降趋势。 特别是夏、秋季下降趋势更加显着。
our results showed significant differences in annual and seasonal precipitation patterns.
结果表明,羊草草原年降水以及月降水的年际波动明显;