High-resolution monitoring of glacier dynamics based on unmanned aerial vehicle survey in the Meili Snow Mountain
Received date: 2020-08-03
Revised date: 2020-09-29
Online published: 2021-11-28
Supported by
National Natural Science Foundation of China(41801031)
National Natural Science Foundation of China(41761144075)
Natural Science Foundation of Yunnan Province(202001BB050068)
The State Key Laboratory of Cryospheric Science Foundation(SKLCS-OP-2019-07)
The Second Tibetan Plateau Scientific Expedtion and Research Program(2019QZKK0208)
A Grant for Talent Introduction of Yunnan University(YJRC3201702)
Copyright
The glaciers of the Meili Snow Mountain are now rapidly retreating and thinning, owing to climate change. The main aim of this study was to monitor the dynamics of the Mingyong Glacier in the Meili Snow Mountain based on unmanned aerial vehicle (UAV) survey and UBase. The result of the digital surface model (DSM) in the Mingyong Glacier terminus shows that the surface morphology has a significant difference between the upper and lower sections. The lower section was covered by a large amount of debris, and a few crevasses developed along the direction of glacier flow. Little debris was found in the upper section, and a lot of transverse crevasses developed there. A mean ice thinning of 1.67 m was observed in the terminus of the Mingyong Glacier from November 2018 to November 2019, and surface lowering was heterogeneous. There were positive and negative alternations in surface lowering in the upper section, surface thinning was observed in the middle section, while a significant thickening was observed in the lower section. Compared with glacier changes in other areas in the High Asia Mountains, the Meili Snow Mountain was the region with the most significant glacier surface elevation change.
Key words: unmanned aerial vehicle; photogrammetry; glacier; Meili Snow Mountain
WU Kunpeng , LIU Shiyin , ZHU Yu , XIE Fuming , GAO Yongpeng . High-resolution monitoring of glacier dynamics based on unmanned aerial vehicle survey in the Meili Snow Mountain[J]. PROGRESS IN GEOGRAPHY, 2021 , 40(9) : 1581 -1589 . DOI: 10.18306/dlkxjz.2021.09.012
表1 正射影像、DSM影像与相控点精度对比Tab.1 Accuracy of orthoimage, DSM and control points (m) |
相控点ID | X方向 | Y方向 | Z方向 |
---|---|---|---|
1 | 0.228 | 0.026 | -0.570 |
2 | 0.120 | 0.007 | 0.457 |
3 | -0.034 | -0.248 | -0.377 |
4 | -0.170 | 0.413 | 0.431 |
5 | -0.161 | -0.140 | -0.423 |
平均误差(EM) | ±0.003 | ±0.012 | ±0.096 |
均方根误差(ER) | ±0.055 | ±0.110 | ±0.310 |
表2 高亚洲地区典型山地冰川变化Tab.2 A summary of glacier surface elevation changes in the High Asia Mountains |
研究区 | 时段 | 冰川表面高程 变化/(m·a-1) | 文献来源 |
---|---|---|---|
天山 | 2000—2012年 | -0.40 ± 0.22 | [31] |
帕米尔 | 2000—2011年 | -0.02 ± 0.13 | [15] |
喀喇昆仑山 | 2000—2011年 | -0.33 ± 0.16 | [15] |
西昆仑山 | 2003—2009年 | 0.04 ± 0.29 | [32] |
青藏高原内流区 | 2003—2009年 | -0.05 ± 0.26 | [32] |
唐古拉山 | 2003—2009年 | -0.68 ± 0.35 | [32] |
喜马拉雅山 | 2003—2009年 | -1.15 ± 0.44 | [32] |
念青唐古拉山 | 2000—2014年 | -1.50 ± 0.15 | [30] |
梅里雪山 | 2018—2019年 | -1.67 ± 0.05 | 本文 |
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