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 ,这同GCMs模拟成果基本一致 The cumulative trend of meteorological and hydrological series over the past 50 years in Hexi area of ​​Gansu province was analyzed by using the cumulative filter and the rank correlation method.The results showed that the trend of annual precipitation, annual mean temperature and annual average flux were significant Geographical distribution and are affected by elevation, which may be different responses of different underlying surfaces to global warming.The climate in this area tends to warm and wet, which is consistent with the results of GCMs simulation