祁连山摆浪河全新世冰量变化初探  

First exploration of the ice volume variations during the Holocene in the Bailanghe River basin,Qilian Mountains

作　　者：吴家章[1,2] 易朝路[1] 许向科[1] 乔宝晋 刘宇硕[3] 

机构地区：[1]中国科学院青藏高原研究所青藏高原环境变化与地表过程重点实验室,北京100085 [2]中国科学院大学,北京100049 [3]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《冰川冻土》2015年第3期595-603,共9页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(40971017;40730101)资助

摘　　要：采用祁连山老虎沟12号冰川2009年RTK测量生成的数字高程模型（DEM）,建立现代冰川表面横截面拟合的二次方程,结合差分GPS测量的冰碛垄形态,运用于祁连山摆浪河上游14号冰川和16号冰川全新世以来冰量变化的估算.结果表明：新冰期以来冰储量减少0.38 km^3,小冰期以来14号冰川和16号冰川的冰储量分别减少0.016 km^3和0.047 km^3;根据祁连山全新世各个时期最大冰川范围的时间,估计了全新世以来14号和16号冰川冰储量的减少速率,新冰期以来为12.2×10^-5-15.0×10^-5km3·a^-1,小冰期以来分别为4.0×10^-5-5.3×10^-5km3·a^-1,11.75×10^-5-15.7×10^-5km3·a^-1.By using the Laohugou Glacier No. 12 digital elevation model derived from measurement,a series of transverse profiles on the Laohugou Glacier No. 12 surface were fitted with quadratic equations,then combined with differential GPS measuring moraine ridge forms,the ice volume variations since the Holocene of the Glaciers No. 14 and No. 16,which lay on the headwaters of the Bailanghe River,were estimated. The results showthat the ice volume have decreased 0. 38 km^3 since the Neoglaciation,Glaciers No. 14 and No. 16 have decreased0. 016 km^3 and 0. 047 km^3,respectively,during the Little Ice Age. According to the time of the maximum glaciation in different periods of the Holocene in the Qilian M ountains,the velocity of the ice volume shrinkage of Glaciers No. 14 and No. 16 since the Holocene are estimated to be 12. 2 × 10^-5- 15. 0 × 10^-5km^3·a^-1since the Neoglaciation,and 4. 0 × 10^-5- 5. 3 × 10^-5km^3·a^-1 and 11. 75 × 10^-5- 15. 7 × 10^-5km^3·a^-1,respectively,since the Little Ice Age.

关 键 词：祁连山 摆浪河 冰碛地貌 全新世 冰量变化 

分 类 号：P343.6[天文地球—水文科学]