川西高原近五十年气候变化的初步研究

Preliminary Research on Climatic Change of West Sichuan Plateau in Recent Fifty Years

利用川西高原近五十年逐日观测资料,研究了川西高原的气候变化,并与高原主体的拉萨和四川盆地代表站成都进行了比较。结果表明,近五十年来,川西高原大部分区域气温升高,气候在变暖。但其变暖幅度比拉萨弱,比成都强;且海拔越高,变暖趋势越明显。川西高原气候变暖最明显的是最低气温,其升温幅度及趋势要比年平均温度明显。近五十年来川西高原降水略有增加,与拉萨的降水趋势较一致,与成都的不同甚至相反,近五十年来成都降水下降趋势明显,值得引起注意。

The observational data in recent fifty years were applied to study climate change in west Sichuan plateau, Lasa and Chengdu. It is found that most areas in west Sichuan plateau become warmer than before one, especially the minimum temperature increase obviously. As for the precipitations of the above areas, there is a slightly increase among the above areas except for Chengdu where precipitation decreases obviously in recent fifty years.