Response of glacier mass balance and meltwater runoff to climate change in the Akesu River Basin, southern Tianshan

被引：0
|
作者：
Wang P. [1 ,2 ]
Xu M. [1 ,2 ,3 ]
Han H. [2 ,3 ]
Li Z. [1 ,2 ]
Song X. [1 ,2 ]
Zhou W. [2 ,4 ]
机构：
[1] School of Mathematics, Lanzhou Jiaotong University, Lanzhou
[2] State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou
[3] University of Chinese Academy of Sciences, Beijing
[4] Faculty of Ceomatic, Lanzhou Jiaotong University, Lanzhou
来源：
Earth Science Frontiers | 2024年 / 31卷 / 02期
关键词：
Akesu River Basin; climate change; degree-day models; glacier mass balance; meltwater runoff;
D O I：
10.13745/j.esf.sf.2023.2.50
中图分类号：
学科分类号：
摘要：
Glacial meltwater is an important constituent of water resource in arid region of northwestern China. Quantitative assessment of meltwater changes is of significance to environmental protection and sustainable development of industry and agriculture in the middle and lower reaches. In this study, the glacier mass balance and meltwater runoff in the Akesu River Basin, southern Tianshan during a 60-yr period from 1957 to 2017 are simulated by the degree-day method, using daily precipitation and air temperature data, Digital Elevation Model (DEM) and glacier distribution data. Runoff components and runoff response to climate change are analyzed. During the 60-yr period, the mean annual mass balance was - 94.6 mm w. e. /a and the accumulative mass balance was - 5. 8 m w. e. The Equilibrium-Line Altitude (ELA) showed a trend of runoff increase at a rate of 1. 6 m/a. During the same period, meltwater runoff and runoff components showed significant increasing trend, where the mean-annual-total-runoff was 53.1 x 108 m'Va and the rate of runoff increase was 0. 24 x 108 m/a. Under warm and humid climate, glacier ice accumulation increased with increasing precipitation in the basin. Whilst, due to significant rise in temperature, glacial melting intensified and the effect of temperature on meltwater runoff increased. Therefore, the hydrological effect caused by the loss of glacier mass balance is enhanced. Results from this study help to further understanding of the effects of changes in regional glacier water resource. © 2024 Science Frontiers editorial department. All rights reserved.
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页码：435 / 446
页数：11
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