青海湖区降水序列及其变化的特征研究  

Precipitation Series and Their Changing Characteristics around the Qinghai Lake

作　　者：时兴合[1] 李生辰[2] 汪青春[1,3] 李栋梁[4] 段水强 苏忠诚[1] 

机构地区：[1]青海省气候中心,青海西宁810001 [2]青海省气象台,青海西宁810001 [3]中国气象局气候研究开放实验室,北京100081 [4]南京信息工程大学,江苏南京210044 [5]青海省水文水资源勘测局,青海西宁810001

出　　处：《冰川冻土》2008年第5期795-800,共6页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(40665002);国家自然科学基金重大项目(40599424);中国气象局气候变化专项(CCSF2007-28)资助

摘　　要：利用青海湖区1958—2005年8个降水观测点月资料,整理出5条(A^E)年、季降水序列,应用气候诊断方法分析了降水的年代际变化及其突变特征.结果表明:5条序列年、季降水量的年际变化趋势大多数年代比较一致,并且E序列代表青海湖区降水量比较可靠.多数序列表现出20世纪60年代春季多雨,70年代秋季多雨,80年代春夏秋季多雨,90年代冬春夏季多雨的季节变化特征以及60—70年代少雨、80年代多雨和90年代少雨的年代际变化特征比较明显,多数序列年度和冬、夏季降水量增多的趋势与新疆、河西中西部、柴达木盆地相同.春季降水量在80年代初发生了一次气候突变,年度和其它季节没有发生突变.Based on monthly precipitation data of eight meteorological stations in 1958-2005 around the Qinghai Lake, five annual and seasonal precipitation series are calculated, and then the inter-dec adal change regulation of precipitation and its abrupt changing characteristics are revealed with the climatic diagnosis method. In this paper, the trend of five annual and seasonal precipitations appears almost synchronous, and E series is dependable representative of precipitation around the Qinghai Lake. The periods of spring in the 1960s, autumn in the 1970s, spring, summer and autumn in the 1980s and winter, spring and summer in the 1990s were precipitation-dominant. The inter-annual precipitation had prominent periods in the 1960s- 1970s, the 1980s and the 1990s. The inter-annual, winter and summer increasing trends of precipitation were similar to those in Xinjiang Region, Hexi Corridor, and Qaidam basin. Five precipitation series in spring had an abrupt change in the 1980s, but annual precipitation and precipitation in other seasons had not obvious change

关 键 词：降水 变化 特征 研究 青海湖 

分 类 号：P426.614[天文地球—大气科学及气象学]