气候变化领域集成服务门户(CCPortal): Contrasting thinning patterns between lake- And land-terminating glaciers in the Bhutanese Himalaya

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DOI	10.5194/tc-13-2733-2019
	Contrasting thinning patterns between lake- And land-terminating glaciers in the Bhutanese Himalaya
	Tsutaki S.; Fujita K.; Nuimura T.; Sakai A.; Sugiyama S.; Komori J.; Tshering P.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	2733
结束页码	2750
卷号	13 期号:10
英文摘要	Despite the importance of glacial lake development in ice dynamics and glacier thinning, in situ and satellite-based measurements from lake-terminating glaciers are sparse in the Bhutanese Himalaya, where a number of proglacial lakes exist. We acquired in situ and satellite-based observations across lake- and land-terminating debris-covered glaciers in the Lunana region, Bhutanese Himalaya. A repeated differential global positioning system survey reveals that thickness change of the debris-covered ablation area of the lake-terminating Lugge Glacier (-4.67 ± 0.07ma-1) is more than 3 times more negative than that of the land-terminating Thorthormi Glacier (-1.40 ± 0.07ma-1) for the 2004-2011 period. The surface flow velocities decrease down-glacier along Thorthormi Glacier, whereas they increase from the upper part of the ablation area to the terminus of Lugge Glacier. Numerical experiments using a two-dimensional ice flow model demonstrate that the rapid thinning of Lugge Glacier is driven by both a negative surface mass balance and dynamically induced ice thinning. However, the thinning of Thorthormi Glacier is minimized by a longitudinally compressive flow regime. Multiple supraglacial ponds on Thorthormi Glacier have been expanding since 2000 and have merged into a single proglacial lake, with the glacier terminus detaching from its terminal moraine in 2011. Numerical experiments suggest that the thinning of Thorthormi Glacier will accelerate with continued proglacial lake development. © 2019 BMJ Publishing Group. All rights reserved.
学科领域	flow pattern; flow velocity; glacial lake; glacier dynamics; hydrological regime; ice flow; numerical model; satellite altimetry; thinning; Bhutan; Himalayas
语种	英语
scopus关键词	flow pattern; flow velocity; glacial lake; glacier dynamics; hydrological regime; ice flow; numerical model; satellite altimetry; thinning; Bhutan; Himalayas
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118822
作者单位	Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan; Department of Geology and Mines, Ministry of Economic Affairs, Thimphu, Bhutan; National Institute of Polar Research, Tachikawa, Japan; Tokyo Denki University, Hatoyama, Japan; Department of Modern Life, Teikyo Heisei University, Tokyo, Japan; Cryosphere Services Division, National Center for Hydrology and Meteorology, Thimphu, Bhutan
推荐引用方式 GB/T 7714	Tsutaki S.,Fujita K.,Nuimura T.,et al. Contrasting thinning patterns between lake- And land-terminating glaciers in the Bhutanese Himalaya[J],2019,13(10).
APA	Tsutaki S..,Fujita K..,Nuimura T..,Sakai A..,Sugiyama S..,...&Tshering P..(2019).Contrasting thinning patterns between lake- And land-terminating glaciers in the Bhutanese Himalaya.The Cryosphere,13(10).
MLA	Tsutaki S.,et al."Contrasting thinning patterns between lake- And land-terminating glaciers in the Bhutanese Himalaya".The Cryosphere 13.10(2019).