globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-10-1845-2016
Scopus记录号: 2-s2.0-84983740578
论文题名:
Reduced melt on debris-covered glaciers: Investigations from Changri Nup Glacier, Nepal
作者: Vincent C; , Wagnon P; , Shea J; M; , Immerzeel W; W; , Kraaijenbrink P; , Shrestha D; , Soruco A; , Arnaud Y; , Brun F; , Berthier E; , Sherpa S; F
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期:4
起始页码: 1845
结束页码: 1858
语种: 英语
英文关键词: debris flow ; elevation ; emergence ; glacier ; ice ; mass balance ; photogrammetry ; sea level ; unmanned vehicle ; velocity ; Nepal
英文摘要: Approximately 25 % of the glacierized area in the Everest region is covered by debris, yet the surface mass balance of debris-covered portions of these glaciers has not been measured directly. In this study, ground-based measurements of surface elevation and ice depth are combined with terrestrial photogrammetry, unmanned aerial vehicle (UAV) and satellite elevation models to derive the surface mass balance of the debris-covered tongue of Changri Nup Glacier, located in the Everest region. Over the debris-covered tongue, the mean elevation change between 2011 and 2015 is -0.93 m year-1 or -0.84 m water equivalent per year (w.e. a-1). The mean emergence velocity over this region, estimated from the total ice flux through a cross section immediately above the debris-covered zone, is +0.37 m w.e. a-1. The debris-covered portion of the glacier thus has an area-averaged mass balance of -1.21 ± 0.2 m w.e. a-1 between 5240 and 5525 m above sea level (m a.s.l.). Surface mass balances observed on nearby debris-free glaciers suggest that the ablation is strongly reduced (by ca. 1.8 m w.e. a-1) by the debris cover. The insulating effect of the debris cover has a larger effect on total mass loss than the enhanced ice ablation due to supraglacial ponds and exposed ice cliffs. This finding contradicts earlier geodetic studies and should be considered for modelling the future evolution of debris-covered glaciers. © 2016 Author(s).
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75096
Appears in Collections:影响、适应和脆弱性
气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: UJF-Grenoble 1, CNRS, Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), Grenoble, France; IRD/UJF-Grenoble1, Laboratoire d'étude des Transferts en Hydrologie et Environnement (LTHE), Grenoble, France; International Centre for Integrated Mountain Development, Kathmandu, Nepal; Department of Physical Geography, Faculty of Geosciences, Utrecht University, Utrecht, Netherlands; Nepal Academy of Science and Technology, Kathmandu, Nepal; UMSA, IGEMA, La Paz, Bolivia; LEGOS, CNRS, Université de Toulouse, Toulouse, France; Department of Environmental Science and Engineering, School of Science, Kathmandu University, Dulikhel, Nepal

Recommended Citation:
Vincent C,, Wagnon P,, Shea J,et al. Reduced melt on debris-covered glaciers: Investigations from Changri Nup Glacier, Nepal[J]. Cryosphere,2016-01-01,10(4)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Vincent C]'s Articles
[, Wagnon P]'s Articles
[, Shea J]'s Articles
百度学术
Similar articles in Baidu Scholar
[Vincent C]'s Articles
[, Wagnon P]'s Articles
[, Shea J]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Vincent C]‘s Articles
[, Wagnon P]‘s Articles
[, Shea J]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.