气候变化领域集成服务门户(CCPortal): Dynamic response of Antarctic Peninsula Ice Sheet to potential collapse of Larsen C and George VI ice shelves

CCPortal

DOI	10.5194/tc-12-2307-2018
	Dynamic response of Antarctic Peninsula Ice Sheet to potential collapse of Larsen C and George VI ice shelves
	Schannwell C.; Cornford S.; Pollard D.; Barrand N.E.
发表日期	2018
ISSN	19940416
卷号	12 期号:7
英文摘要	Ice shelf break-up and disintegration events over the past 5 decades have led to speed-up, thinning, and retreat of upstream tributary glaciers and increases to rates of global sea-level rise. The southward progression of these episodes indicates a climatic cause and in turn suggests that the larger Larsen C and George VI ice shelves may undergo a similar collapse in the future. However, the extent to which removal of the Larsen C and George VI ice shelves will affect upstream tributary glaciers and add to global sea levels is unknown. Here we apply numerical ice-sheet models of varying complexity to show that the centennial sea-level commitment of Larsen C embayment glaciers following immediate shelf collapse is low ( < 2.5 mm to 2100, < 4.2 mm to 2300). Despite its large size, Larsen C does not provide strong buttressing forces to upstream basins and its collapse does not result in large additional discharge from its tributary glaciers in any of our model scenarios. In contrast, the response of inland glaciers to a collapse of the George VI Ice Shelf may add up to 8 mm to global sea levels by 2100 and 22 mm by 2300 due in part to the mechanism of marine ice sheet instability. Our results demonstrate the varying and relative importance to sea level of the large Antarctic Peninsula ice shelves considered to present a risk of collapse. © 2018 Author(s).
学科领域	complexity; discharge; dynamic response; glacial hydrology; ice retreat; ice sheet; ice shelf; sea level change; shelf break; Antarctica; George VI Ice Shelf; Larsen Ice Shelf; West Antarctica
语种	英语
scopus关键词	complexity; discharge; dynamic response; glacial hydrology; ice retreat; ice sheet; ice shelf; sea level change; shelf break; Antarctica; George VI Ice Shelf; Larsen Ice Shelf; West 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/119101
作者单位	School of Geography Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom; Centre for Polar Observation and Modelling, School of Geographical Sciences, University of Bristol, Bristol, United Kingdom; Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Schannwell C.,Cornford S.,Pollard D.,et al. Dynamic response of Antarctic Peninsula Ice Sheet to potential collapse of Larsen C and George VI ice shelves[J],2018,12(7).
APA	Schannwell C.,Cornford S.,Pollard D.,&Barrand N.E..(2018).Dynamic response of Antarctic Peninsula Ice Sheet to potential collapse of Larsen C and George VI ice shelves.Cryosphere,12(7).
MLA	Schannwell C.,et al."Dynamic response of Antarctic Peninsula Ice Sheet to potential collapse of Larsen C and George VI ice shelves".Cryosphere 12.7(2018).