摘要
据中国冰川目录和天山南北树木年轮年表恢复近500年的气候要素我国天山现代冰川8900条,面积9192.43km^2,冰储量1010.5km^3,主要分布在天山西部5000m以上的高山地带。近30年的天山冰川考察及29年乌鲁木齐河源1号冰川物质平衡:观测资料分析表明,中国天山现代冰川普遍处于退缩阶段。预计2000年气候将出现降水偏多的趋势。
According to the latest inventory of glaciers, there are 8900modern glaciers in the Chinese portion of the Tianshan Mountainswith a total area of 9192.43km^2 and a total ice volume of 1010.5km^3.These glaciers are mainly distributed over large and high mounta-ins above 5000m a.s.l in the western part of the mountains. East-ward, the number and the size of glaciers decrease. Investigationand the successive fixed-position observations on Glacier No.1 atthe headwater of the Urumqi River both show that the modern gl- acier are generally in the stage of retreating.Dendrochronologicalanalysis indicate that glaciers in the Tianshan Mountains are inthe third dry-and-warm cycle since the Little Ice Age,i.e. theglaciers are now in the state of retreating.And prospectively, theclimate will tend to increase the precipitation at about year 2000.
出处
《干旱区地理》
CSCD
北大核心
1989年第3期8-14,共7页
Arid Land Geography
