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UAV-based geomorphological evolution of the Terminus Area of the Hailuogou Glacier, Southeastern Tibetan Plateau between 2017 and 2020

Xu, Shuyang; Fu, Ping; Quincey, Duncan; Feng, Meili; Marsh, Stuart; Liu, Qiao

UAV-based geomorphological evolution of the Terminus Area of the Hailuogou Glacier, Southeastern Tibetan Plateau between 2017 and 2020 Thumbnail


Authors

Shuyang Xu

Ping Fu

Duncan Quincey

Meili Feng

STUART MARSH Stuart.Marsh@nottingham.ac.uk
Professor of Geospatial Engineering

Qiao Liu



Abstract

Hailuogou (HLG) Glacier, a rapidly receding temperate glacier in the southeastern Tibetan Plateau, has been observed to lose mass partly through ice frontal mechanical ablation (i.e., ice collapse). These events are difficult to monitor and quantify due to their small scale and frequent nature. However, recent developments in Uncrewed Aerial Vehicles (UAV) have provided a possible approach to track their spatiotemporal variation and their impact on the geomorphological evolution of the glacier terminus area. Here, we present analysis from UAV surveys conducted over eight field campaigns to the HLG Glacier, providing evidence of glacier change between October 2017 and November 2020. Structure from Motion with Multi-View Stereo (SfM-MVS) was applied to produce multi-temporal Digital Surface Models (DSMs) and orthophoto mosaics, from which geomorphological maps and DEMs of Difference (DoDs) were derived to quantify glacier changes. These analyses reveal that at the margins of the glacier terminus retreated 132.1 m over the period of analysis, and that in the area specifically affected by collapsing (i.e., the glacier collapsed terminus), it retreated 236.4 m. Overall the volume lost in the terminal area was of the order of 184.61 ± 10.32 × 104 m3, within which the volume change due to observed collapsing events comprises approximately 28%. We show that ice volume changes at the terminus due to a single ice collapse event may exceed the interannual level of volume change, and the daily volume of ice loss due to ice calving exceeds the seasonal and interannual level by a factor of ~2.5 and 4. Our results suggest that the evolution of the HLG Glacier terminus is dominantly controlled by the frontal ice-water interactions. If the future evolution of glaciers such as HLG Glacier is to be robustly predicted, the contribution of mechanical ablation should be accounted for by numerical models.

Citation

Xu, S., Fu, P., Quincey, D., Feng, M., Marsh, S., & Liu, Q. (2022). UAV-based geomorphological evolution of the Terminus Area of the Hailuogou Glacier, Southeastern Tibetan Plateau between 2017 and 2020. Geomorphology, 411, Article 108293. https://doi.org/10.1016/j.geomorph.2022.108293

Journal Article Type Article
Acceptance Date May 3, 2022
Online Publication Date May 6, 2022
Publication Date Aug 15, 2022
Deposit Date Jul 15, 2022
Publicly Available Date May 7, 2023
Journal Geomorphology
Print ISSN 0169-555X
Publisher Elsevier BV
Peer Reviewed Peer Reviewed
Volume 411
Article Number 108293
DOI https://doi.org/10.1016/j.geomorph.2022.108293
Keywords Earth-Surface Processes
Public URL https://nottingham-repository.worktribe.com/output/8955054
Publisher URL https://www.sciencedirect.com/science/article/abs/pii/S0169555X22001866

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