甘肃河西地区近50年气象和水文序列的变化趋势

Variance tendency in the 50-year annual meteorological and hydrological series of Hexi region of Gansu Province

应用累积滤波器和秩次相关法 ,对甘肃河西地区近 5 0年气象和水文序列的变化趋势进行了分析 .结果表明 ,该区年降水量、年平均气温和年平均流量变化趋势存在明显的地域分布 ,并受海拔高程的影响 .这可能是不同的下垫面对全球变暖的不同响应 .该区气候总体趋于暖湿 。

To analysis the variance of the nearly 50-year annual precipitation,annual runoff and yearly average air temperature of Hexi region,the data from 25 meteorological stations and hydrologic stations in the region with different altitudes were used.The results show that the general variance tendencies of annual precipitation,annual runoff and yearly average air temperature of Hexi region are affected by the positions of the stations and their altitudes.The climate of Hexi region tends to be warm and wet.The results agree with those of other's such as GCMs.