生态学报2017，Vol.37Issue(24)：8422-8432,11.DOI:10.5846/stxb201611012223
1967-2014年科西河流域冰湖时空变化
Spatial-temporal variations of glacial lakes in the Koshi River basin from 1967 to 2014
摘要
Abstract
Glacial lakes play an extremely important role in the fragile plateau eco-environment because they are sensitive indicators of climate change in alpine cold areas and can be a source for mountain outburst flood or cause mudflow disaster.Based on multi-source remote sensing image data (Corona,Landsat MSS/TM/ETM +/OLI) from the 1960s to 2010s,topographic maps in the 1970s,glacier inventory and meteorological data,we performed a comprehensive assessment of the spatial-temporal variations of glacial lakes (≥0.05 km2) in the Koshi River basin and examined their influence on glacier changes.The major results of these studies are as follows.First,the area of glacial lakes in the Koshi River basin remained constant between the 1960s to the early 1980s before rapidly expanding between the mid-1980s and early 2000s.The most rapid expansion was observed after the 2000s.Second,the lakes were centrally distributed in altitude band of 5000-5500 m in this river basin.Glacial lakes with an area of 0.05-0.25 km2 constituted the highest proportion of lakes (74.45％),and the largest area was covered by 0.05-0.25 km2 and above 1 km2 lakes (64.18％).Third,the glacial lakes in each subcatchment of the Koshi River exhibited a trend of expansion,with the exception of the Likhu Khola basin.Furthermore,there were significant changes in the areas of glacial lakes in the Arun basin.Climate warming and glacial retreat are the main causes of glacial lake expansion in the Koshi River basin.Furthermore,when the terminus of a glacier extends into a glacial lake,there is a significant exchange of matter and energy.We infer that this may accelerate ice melting and the consequent glacier retreat.关键词
冰湖/冰川/遥感/科西河/青藏高原Key words
glacial lake/glacier/remote sensing/Koshi River/Tibetan Plateau引用本文复制引用
宫鹏,姚晓军,孙美平,安丽娜,李晓锋..1967-2014年科西河流域冰湖时空变化[J].生态学报,2017,37(24):8422-8432,11.基金项目
国家自然科学基金项目(41261016) （41261016）
中国科学院冰冻圈科学国家重点实验室开放基金项目(SKLCS-OP-2016-10) （SKLCS-OP-2016-10）
