气候变化领域集成服务门户(CCPortal): Post-20(th) century near-steady state of Batura Glacier: observational evidence of Karakoram Anomaly

CCPortal

DOI	10.1038/s41598-020-57660-0
	Post-20(th) century near-steady state of Batura Glacier: observational evidence of Karakoram Anomaly
	Gao, Haifeng; Zou, Xiaojuan; Wu, Jianfeng; Zhang, Yinsheng; Deng, Xiaoya; Hussain, Saulat; Wazir, Muhammad Atif; Zhu, Guocai
通讯作者	Gao, HF (通讯作者)
发表日期	2020
ISSN	2045-2322
卷号	10 期号:1
英文摘要	Stable or marginal mass loss dominating in Karakoram has been reported widely through satellite and ground investigations. This work aimed to verify the variation in glacier mass by collecting ground-based data. By tracking profiles from the first survey by China-Pakistan Batura Glacier Investigation Group in 1974-1975, we revisited Batura Glacier and conducted an updated comparable measurement of the glacier surface elevation and ice thickness of this large valley glacier of Karakoram, in August 2017. Results of ground penetrating radar (GPR) measurement were used to improve the accuracy of an ice thickness distribution model (GlabTop2). The model calculation agreed reasonably with the measurement when the optimal basal shear stress (100 kPa for clean ice to 140 kPa for heavy debris cover) and shape factor (0.9) were used. We then used a glacier bed topographies map to calculate the ice flux. By subtracting the glacier surface topographies from the remote-sensing measurements, we observed a marginal thinning in Batura during 2000-2016, with a rate of variation in glacier surface elevation of -0.12 +/- 0.27m a(-1). It indicated that the mass gain in the accumulation area nearly compensated the mass loss in the ablation area. In addition, both ground and satellite remote measurement reveal a steady rate of decrease in surface of the Batura tongue, implying an absence of significant variation during the past 40 years. Moreover, the mass conservation equation was applied to the Batura tongue, in combination with surface elevation variation and ice flux evolution. The tongue-averaged mass balance diminished by more than half from the 1970s to the 2010s. In summary, we inferred a near-steady state of Batura Glacier post 2000 based on the above-mentioned evidence of Karakoram Anomaly.
关键词	ICE-THICKNESS DISTRIBUTION GROUND-PENETRATING RADAR MASS-BALANCE VOLUME REGION ALPS HIMALAYA ELEVATION RUNOFF IMAGES
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000559822200011
来源期刊	SCIENTIFIC REPORTS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259754
推荐引用方式 GB/T 7714	Gao, Haifeng,Zou, Xiaojuan,Wu, Jianfeng,et al. Post-20(th) century near-steady state of Batura Glacier: observational evidence of Karakoram Anomaly[J]. 中国科学院青藏高原研究所,2020,10(1).
APA	Gao, Haifeng.,Zou, Xiaojuan.,Wu, Jianfeng.,Zhang, Yinsheng.,Deng, Xiaoya.,...&Zhu, Guocai.(2020).Post-20(th) century near-steady state of Batura Glacier: observational evidence of Karakoram Anomaly.SCIENTIFIC REPORTS,10(1).
MLA	Gao, Haifeng,et al."Post-20(th) century near-steady state of Batura Glacier: observational evidence of Karakoram Anomaly".SCIENTIFIC REPORTS 10.1(2020).