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Arid Land Geography ›› 2023, Vol. 46 ›› Issue (7): 1073-1083.doi: 10.12118/j.issn.1000-6060.2022.509

• Climatology and Hydrology • Previous Articles     Next Articles

Glacier changes on the north slope of Tianshan Mountains in recent 60 years

YANG Xuewen1,2(),WANG Ninglian1,2,3(),LIANG Qian1,2,CHEN An’an1,2   

  1. 1. Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Xi’an 710127, Shaanxi, China
    2. Institute of Earth Surface System and Hazards, College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, Shaanxi, China
    3. State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2022-10-09 Revised:2022-12-06 Online:2023-07-25 Published:2023-08-03

Abstract:

Understanding glacier changes on the north slope of the Tianshan Mountains on the basin scale is critical for the rational development and use of water resources in downstream oases. The recent glacier boundaries on the north slope of the Tianshan Mountains were obtained based on multisource remote sensing images. Combined with the glacier inventory released earlier and ASTER DEM, changes in the glacier area and mass balance in this region were analyzed. The results revealed that: (1) A total of 10061 glaciers were distributed on the north slope of the Tianshan Mountains around 2015, with a total area of 4855.85±245.86 km2. The glacier area on the north slope of the Tianshan Mountains in China decreased at a rate of 0.52%·a−1±0.06%·a−1 from 1960s to 2015. Furthermore, an accelerated decreasing trend was observed (0.96%·a−1±0.88%·a−1). The glacier area in the foreign part of the north slope of Tianshan Mountains decreased at a rate of 0.56%·a−1±0.31%·a−1 from 1999 to 2015. (2) The change rate of glacier surface elevation on the north slope of Tianshan Mountains from 2000 to 2020 was −0.57±0.01 m·a−1, and the glacier mass balance was −0.39±0.04 m w.e.·a−1. (3) An obvious spatial difference exists in the changes of glacier area and mass balance in the eastern and western parts of the north slope of Tianshan Mountains, and high decreasing rates of glacier area and mass balance were observed in the eastern part.

Key words: north slope of Tianshan Mountains, glacier change, mass balance, remote sensing