Glacier Surface Velocity Variations in the West Kunlun Mts. with Sentinel-1A Image Feature-Tracking (2014–2023)

Author:

Wang Zhenfeng12,Gao Tanguang3ORCID,Kang Yulong1,Guo Wanqin1,Jiang Zongli2

Affiliation:

1. State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China

2. School of Earth Sciences and Spatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

3. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China

Abstract

Glacier velocity is a crucial parameter in understanding glacier dynamics and mass balance, especially in response to climate change. Despite numerous studies on glaciers in the West Kunlun Mts., there is still insufficient knowledge about the details of inter- and intra-annual velocity changes under global warming. This study analyzed the glacier velocity changes in the West Kunlun Mts. using Sentinel-1A satellite data. Our results revealed that: (1) The velocity of glaciers across the region shows an increasing trend from 2014 to 2023. (2) Five glaciers were found to have been surged during the study period, among which two of them were not reported before. (3) The surges in the study region were potentially controlled through a combination of hydrological and thermal mechanisms. (4) The glacier N2, Duofeng Glacier, and b2 of Kunlun Glacier exhibit higher annual velocities (32.82 m a−1) compared to surging glaciers in quiescent phases (13.22 m a−1), and were speculated as advancing or fast-flowing glaciers.

Funder

National Natural Science Foundation of China

Second Tibetan Plateau Scientific Expedition and Research Program

Outstanding Youth Fund of Gansu Province

Fundamental Research Funds for the Central Universities

Natural Science Foundation of Hunan Province

Publisher

MDPI AG

Subject

General Earth and Planetary Sciences

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