气候变化领域集成服务门户(CCPortal): Recent rift formation and impact on the structural integrity of the Brunt Ice Shelf, East Antarctica

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DOI	10.5194/tc-12-505-2018
	Recent rift formation and impact on the structural integrity of the Brunt Ice Shelf, East Antarctica
	De Rydt J.; Hilmar Gudmundsson G.; Nagler T.; Wuite J.; King E.C.
发表日期	2018
ISSN	19940416
卷号	12 期号:2
英文摘要	We report on the recent reactivation of a large rift in the Brunt Ice Shelf, East Antarctica, in December 2012 and the formation of a 50-km long new rift in October 2016. Observations from a suite of ground-based and remote sensing instruments between January 2000 and July 2017 were used to track progress of both rifts in unprecedented detail. Results reveal a steady accelerating trend in their width, in combination with alternating episodes of fast (> 600-mgdayg-1) and slow propagation of the rift tip, controlled by the heterogeneous structure of the ice shelf. A numerical ice flow model and a simple propagation algorithm based on the stress distribution in the ice shelf were successfully used to hindcast the observed trajectories and to simulate future rift progression under different assumptions. Results show a high likelihood of ice loss at the McDonald Ice Rumples, the only pinning point of the ice shelf. The nascent iceberg calving and associated reduction in pinning of the Brunt Ice Shelf may provide a uniquely monitored natural experiment of ice shelf variability and provoke a deeper understanding of similar processes elsewhere in Antarctica. © 2018 Author(s).
学科领域	algorithm; flow modeling; formation mechanism; ground-based measurement; hindcasting; ice flow; ice shelf; iceberg calving; numerical model; reactivation; remote sensing; rifting; stress field; Antarctica; Brunt Ice Shelf; East Antarctica
语种	英语
scopus关键词	algorithm; flow modeling; formation mechanism; ground-based measurement; hindcasting; ice flow; ice shelf; iceberg calving; numerical model; reactivation; remote sensing; rifting; stress field; Antarctica; Brunt Ice Shelf; East Antarctica
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119223
作者单位	British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom; ENVEO, ICT-Technologiepark, Technikerstr. 21a, Innsbruck, 6020, Austria; Geography and Environmental Sciences, Northumbria University, Newcastle, United Kingdom
推荐引用方式 GB/T 7714	De Rydt J.,Hilmar Gudmundsson G.,Nagler T.,et al. Recent rift formation and impact on the structural integrity of the Brunt Ice Shelf, East Antarctica[J],2018,12(2).
APA	De Rydt J.,Hilmar Gudmundsson G.,Nagler T.,Wuite J.,&King E.C..(2018).Recent rift formation and impact on the structural integrity of the Brunt Ice Shelf, East Antarctica.Cryosphere,12(2).
MLA	De Rydt J.,et al."Recent rift formation and impact on the structural integrity of the Brunt Ice Shelf, East Antarctica".Cryosphere 12.2(2018).