气候变化领域集成服务门户(CCPortal): Bathymetry Beneath Ice Shelves of Western Dronning Maud Land; East Antarctica; and Implications on Ice Shelf Stability

CCPortal

DOI	10.1029/2019GL086724
	Bathymetry Beneath Ice Shelves of Western Dronning Maud Land; East Antarctica; and Implications on Ice Shelf Stability
	Eisermann H.; Eagles G.; Ruppel A.; Smith E.C.; Jokat W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	Antarctica's ice shelves play a key role in stabilizing the ice streams that feed them. Since basal melting largely depends on ice-ocean interactions, it is vital to attain consistent bathymetry models to estimate water and heat exchange beneath ice shelves. We have constructed bathymetry models beneath the ice shelves of western Dronning Maud Land by inverting airborne gravity data and incorporating seismic, multibeam, and radar depth references. Our models reveal deep glacial troughs beneath the ice shelves and terminal moraines close to the continental shelf breaks, which currently limit the entry of Warm Deep Water from the Southern Ocean. The ice shelves buttress a catchment that comprises an ice volume equivalent to nearly 1 m of eustatic sea level rise, partly susceptible to ocean forcing. Changes in water temperature and thermocline depth may accelerate marine-based ice sheet drainage and constitute an underestimated contribution to future global sea level rise. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Bathymetry; Catchments; Sea level; Airborne gravity datum; Continental shelves; Eustatic sea-level rise; Global sea level rise; Ice-ocean interactions; Terminal moraines; Thermocline depth; Water temperatures; Ice; basal melting; bathymetric survey; eustacy; gravity field; heating; ice shelf; moraine; seismic survey; thermocline; trough; volume change; Antarctica; East Antarctica; Queen Maud Land
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170256
作者单位	Alfred-Wegener-Institute, Bremerhaven, Germany; Federal Institute for Geosciences and Natural Resources, Hannover, Germany; Faculty of Geosciences, University of Bremen, Bremen, Germany
推荐引用方式 GB/T 7714	Eisermann H.,Eagles G.,Ruppel A.,et al. Bathymetry Beneath Ice Shelves of Western Dronning Maud Land; East Antarctica; and Implications on Ice Shelf Stability[J],2020,47(12).
APA	Eisermann H.,Eagles G.,Ruppel A.,Smith E.C.,&Jokat W..(2020).Bathymetry Beneath Ice Shelves of Western Dronning Maud Land; East Antarctica; and Implications on Ice Shelf Stability.Geophysical Research Letters,47(12).
MLA	Eisermann H.,et al."Bathymetry Beneath Ice Shelves of Western Dronning Maud Land; East Antarctica; and Implications on Ice Shelf Stability".Geophysical Research Letters 47.12(2020).