气候变化领域集成服务门户(CCPortal): Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry

CCPortal

DOI	10.5194/tc-13-2771-2019
	Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry
	De Rydt J.; Hilmar Gudmundsson G.; Nagler T.; Wuite J.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	2771
结束页码	2787
卷号	13 期号:10
英文摘要	Despite the potentially detrimental impact of large-scale calving events on the geometry and ice flow of the Antarctic Ice Sheet, little is known about the processes that drive rift formation prior to calving, or what controls the timing of these events. The Brunt Ice Shelf in East Antarctica presents a rare natural laboratory to study these processes, following the recent formation of two rifts, each now exceeding 50 km in length. Here we use 2 decades of in situ and remote sensing observations, together with numerical modelling, to reveal how slow changes in ice shelf geometry over time caused build-up of mechanical tension far upstream of the ice front, and culminated in rift formation and a significant speed-up of the ice shelf. These internal feedbacks, whereby ice shelves generate the very conditions that lead to their own (partial) disintegration, are currently missing from ice flow models, which severely limits their ability to accurately predict future sea level rise. © 2019 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.
学科领域	caving; ice flow; ice shelf; laboratory method; numerical model; remote sensing; rifting; sea level change; Antarctic Ice Sheet; Antarctica; Brunt Ice Shelf; East Antarctica
语种	英语
scopus关键词	caving; ice flow; ice shelf; laboratory method; numerical model; remote sensing; rifting; sea level change; Antarctic Ice Sheet; Antarctica; Brunt Ice Shelf; East Antarctica
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/118820
作者单位	Department of Geography and Environmental Sciences, Northumbria University, Newcastle upon Tyne, United Kingdom; ENVEO - Environmental Earth Observation, Innsbruck, Austria
推荐引用方式 GB/T 7714	De Rydt J.,Hilmar Gudmundsson G.,Nagler T.,et al. Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry[J],2019,13(10).
APA	De Rydt J.,Hilmar Gudmundsson G.,Nagler T.,&Wuite J..(2019).Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry.The Cryosphere,13(10).
MLA	De Rydt J.,et al."Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry".The Cryosphere 13.10(2019).