globalchange  > 气候减缓与适应
DOI: 10.1002/2017JF004349
Scopus记录号: 2-s2.0-85042619467
论文题名:
A Full-Stokes 3-D Calving Model Applied to a Large Greenlandic Glacier
作者: Todd J.; Christoffersen P.; Zwinger T.; Råback P.; Chauché N.; Benn D.; Luckman A.; Ryan J.; Toberg N.; Slater D.; Hubbard A.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期:3
起始页码: 410
结束页码: 432
语种: 英语
英文关键词: calving ; Greenland ; modeling
Scopus关键词: crevasse ; glacier dynamics ; ice retreat ; ice sheet ; iceberg calving ; melting ; three-dimensional modeling ; Antarctic Ice Sheet ; Antarctica ; Arctic ; Greenland ; Greenland Ice Sheet
英文摘要: Iceberg calving accounts for around half of all mass loss from both the Greenland and Antarctic ice sheets. The diverse nature of calving and its complex links to both internal dynamics and climate make it challenging to incorporate into models of glaciers and ice sheets. Here we present results from a new open-source 3-D full-Stokes calving model developed in Elmer/Ice. The calving model implements the crevasse depth criterion, which states that calving occurs when surface and basal crevasses penetrate the full thickness of the glacier. The model also implements a new 3-D rediscretization approach and a time-evolution scheme which allow the calving front to evolve realistically through time. We test the model in an application to Store Glacier, one of the largest outlet glaciers in West Greenland, and find that it realistically simulates the seasonal advance and retreat when two principal environmental forcings are applied. These forcings are (1) submarine melting in distributed and concentrated forms and (2) ice mélange buttressing. We find that ice mélange buttressing is primarily responsible for Store Glacier's seasonal advance and retreat. Distributed submarine melting prevents the glacier from forming a permanent floating tongue, while concentrated plume melting has a disproportionately large and potentially destabilizing effect on the calving front position. Our results also highlight the importance of basal topography, which exerts a strong control on calving, explaining why Store Glacier has remained stable during a period when neighboring glaciers have undergone prolonged interannual retreat. ©2018. American Geophysical Union. All Rights Reserved.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114345
Appears in Collections:气候减缓与适应

Files in This Item:

There are no files associated with this item.


作者单位: Department of Geography and Sustainable Development, University of St Andrews, St. Andrews, United Kingdom; Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom; CSC-IT Center for Science, Espoo, Finland; Access Arctic SARL, Sauvigny les bois, France; Department of Geography, College of Science, Swansea University, Swansea, United Kingdom; Centre for Glaciology, Institute of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, United Kingdom; School of Geosciences, University of Edinburgh, Edinburgh, United Kingdom; Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geology, Arctic University of Norway, Tromsø, Norway

Recommended Citation:
Todd J.,Christoffersen P.,Zwinger T.,et al. A Full-Stokes 3-D Calving Model Applied to a Large Greenlandic Glacier[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(3)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Todd J.]'s Articles
[Christoffersen P.]'s Articles
[Zwinger T.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Todd J.]'s Articles
[Christoffersen P.]'s Articles
[Zwinger T.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Todd J.]‘s Articles
[Christoffersen P.]‘s Articles
[Zwinger T.]‘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.