祁连山中段新冰期以来的冰川序列及环境变化  

The stage-division and environmental significance of moraine in Qiyi glacier, Qilian Shan

作　　者：杨威[1] 周尚哲[1,2] CHIYUKI Narama 王孝理[1] 王杰[1] 

机构地区：[1]兰州大学资源环境学院 [2]华南师范大学地理系,广东广州510080 [3]名古屋大学地球水循环研究所

出　　处：《兰州大学学报（自然科学版）》2006年第6期12-15,共4页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金资助项目(40371013)

摘　　要：通过对七一冰川及其附近冰碛垅形态、植被覆盖、岩石种类及Schmidt hammer反弹R值、剖面内部组成的观测、对比和分析,认为新冰期时冰川扩张到海拔4 km处,较现代冰川末端降低约300 m,冰川前进约2 km左右．小冰期的三列冰碛垅形成时间间隔基本相同,规模依次减小,表明小冰期的三次冷期中以15世纪最冷,持续时间最长,而17世纪次之,19世纪持续时间最短．The observations and comparisons of the features of debris, lichens, vegetation, soil weathering and R-values of Schmidt hammer indicate that the 7.1 glacier had advanced about 2 km and reached 4 km in the Neoglaciation. During the little ice age, three end moraines were formed in sequence, which demonstrates that the temperature in the 15th century was lowest and might have lasted a much longer time in little ice age. Moreover, the temperature in the 17th century was colder than that in the 19th century.

关 键 词：七一冰川 冰碛垅 小冰期 

分 类 号：P931[天文地球—自然地理学]