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Journal of Arid Land  2019, Vol. 11 Issue (4): 537-550    DOI: 10.1007/s40333-019-0025-6
    
Climate change and its impacts on mountain glaciers during 1960-2017 in western China
Yinge LIU1,*(), Ninglian WANG2,3, Junhui ZHANG1, Lingang WANG1
1 Key Laboratory of Disaster Monitoring and Mechanism Simulating in Shaanxi Province, College of Geography and Environment, Baoji University of Arts and Science, Baoji 721013, China
2 State Key Laboratory of Cryosphere Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
3 College of Urban and Environmental Science, Northwest University, Xi'an 710127, China
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Abstract  

Mountain glaciers are highly sensitive to climate change. In this paper, we systematically analyzed and discussed the responses of glaciers to climate change during 1960-2017 in western China by the methods of least squares and correlation analysis. Results show that the maximum temperature, minimum temperature, average temperature, and precipitation significantly increased in western China at the rates of 0.32°C/10a, 0.48°C/10a, 0.39°C/10a, and 11.20 mm/10a, respectively. However, the wind speed, hours of sunshine, snowfall, and snowy days displayed decreasing trends at the rates of -0.53 m/(s?10a), 3.72 h/10a, -2.90 mm/10a, and -0.10 d/10a, respectively. The annual percentage of glacier area decreased by approximately 0.42%, and the average glacier area decreased by 2.76 km2/a. Meanwhile, glacial shrinkages were greater in the Altay Mountains, Tanggula Mountains, and Qilian Mountains than in the other mountainous regions. Glacier accumulation decreased while melt volume increased at a rate of 2.7×104 m3/a. The area of melt volume was 1.3 times that of the glacier accumulation area. The glacier mass balance (GMB) decreased substantially at a rate of -14.0 mm/a, whereas the equilibrium line altitude (ELA) showed an increasing trend at a rate of 0.5 mm/a. After 1997, the mass was smaller than -500.0 mm, indicating a huge loss in glaciers. Furthermore, relationships between ELA and GMB and various climatic factors were established. Temperature and precipitation demonstrated a significantly negative correlation, whereas wind speed and snowy days had significantly positive correlations with GMB. Snowy days also exhibited a remarkably negative correlation with ELA. The strong warming trend and less snowy days were thought to be the main factors leading to glacial melting, whereas the increase in precipitation, and reductions of sunshine hours and wind speed might slow glacial melting.



Key wordstemperature      precipitation      climate trend      glacier variation      impacts      western China     
Received: 05 February 2018      Published: 10 August 2019
Fund:  This work was supported by the National Natural Science Foundation of China (41771048, 41571076), the National Social Science Foundation of China (15XZZ012), the Key Lab Project of Shaanxi Province of China (13JS010), the Baoji University of Arts and Science Project (ZK16061), and the Baoji University of Arts and Science Geography Key Discipline Project.
Corresponding Authors: Yinge LIU     E-mail: liuyg@lzb.ac.cn
About author:

The first and second authors contributed equally to this work.

Cite this article:

Yinge LIU, Ninglian WANG, Junhui ZHANG, Lingang WANG. Climate change and its impacts on mountain glaciers during 1960-2017 in western China. Journal of Arid Land, 2019, 11(4): 537-550.

URL:

http://jal.xjegi.com/10.1007/s40333-019-0025-6     OR     http://jal.xjegi.com/Y2019/V11/I4/537

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