山地冰川物质平衡线与气候  

High Mountain Glaciers' ELA0 and Climate

作　　者：鞠远江[1] 刘耕年[1] 张晓咏[1] 傅海荣[1] 魏遐[1] 崔之久[1] 

机构地区：[1]北京大学环境学院,北京100871

出　　处：《地理科学进展》2004年第3期43-49,共7页Progress in Geography

基　　金：国家自然科学基金重大研究项目"典型山地-绿洲-荒漠系统的演变及其预测模型"(批准号:90102016)资助项目.

摘　　要：在总结前人确定山地冰川物质平衡线高度的各种方法基础上,对利用山地冰川物质平衡线进行古气候恢复的方法进行探讨。以我国乌鲁木齐河流域一号冰川为例,运用侧碛垄最大高度法确定了小冰期第二次冰进时冰川的平衡线高度,依靠1960年代以来该冰川所积累的大量观测资料,建立和完善现代冰川平衡线高度与气候统计关系公式,并通过变化应用到该冰川小冰期第二次冰进。给出了该次冰进时气候的半定量推算结果。The authors of present paper deal with the implication of the equilibrium line altitude (ELAO) of glacier for environment and review the methods of its identification so far within China and abroad. Finally the authors identified the ELAO for the present No.1 glacier in the U-rumqi glacier valley, Tianshan Mts, China, by determining its maximum elevation of lateral moraines (MELM), based on their field observations in recent years and a study of great amount of the related data surveyed since 1960. As a result, the authors revised the formula for the relationship between the present ELAO and climate. This formula is then applied to characterize the glacier in the stage of second glacier advance during the Little Ice Age and hence the results of semi-quantified presumption of climate prior to about 250a B.P. are obtained.

关 键 词：物质平衡线 气候 小冰期 

分 类 号：P343.6[天文地球—水文科学]