气候变化领域集成服务门户(CCPortal): Detailed Seismic Bathymetry Beneath Ekström Ice Shelf; Antarctica: Implications for Glacial History and Ice-Ocean Interaction

CCPortal

DOI	10.1029/2019GL086187
	Detailed Seismic Bathymetry Beneath Ekström Ice Shelf; Antarctica: Implications for Glacial History and Ice-Ocean Interaction
	Smith E.C.; Hattermann T.; Kuhn G.; Gaedicke C.; Berger S.; Drews R.; Ehlers T.A.; Franke D.; Gromig R.; Hofstede C.; Lambrecht A.; Läufer A.; Mayer C.; Tiedemann R.; Wilhelms F.; Eisen O.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:10
英文摘要	The shape of ice shelf cavities are a major source of uncertainty in understanding ice-ocean interactions. This limits assessments of the response of the Antarctic ice sheets to climate change. Here we use vibroseis seismic reflection surveys to map the bathymetry beneath the Ekström Ice Shelf, Dronning Maud Land. The new bathymetry reveals an inland-sloping trough, reaching depths of 1,100 m below sea level, near the current grounding line, which we attribute to erosion by palaeo-ice streams. The trough does not cross-cut the outer parts of the continental shelf. Conductivity-temperature-depth profiles within the ice shelf cavity reveal the presence of cold water at shallower depths and tidal mixing at the ice shelf margins. It is unknown if warm water can access the trough. The new bathymetry is thought to be representative of many ice shelves in Dronning Maud Land, which together regulate the ice loss from a substantial area of East Antarctica. ©2020. The Authors.
英文关键词	Bathymetry; Climate change; Electric grounding; Sea level; Seismology; Antarctic ice sheets; Conductivity temperature depths; Continental shelves; East antarctica; Glacial history; Grounding line; Ice-ocean interactions; Seismic reflection survey; Ice; bathymetry; climate change; cold water; ice sheet; ice shelf; ice stream; ice-ocean interaction; sea level change; seismic reflection; vibroseis; warm water; Antarctica; East Antarctica; Ekstrom Ice Shelf; 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/170321
作者单位	Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany; Norwegian Polar Institute, Tromsø, Norway; BGR, Federal Institute for Geosciences and Natural Resources, Hannover, Germany; Department of Geosciences, University of Tübingen, Tübingen, Germany; Now at Institute of Geology and Mineralogy, University of Cologne, Cologne, Germany; Geodesy and Glaciology, Bavarian Academy of Sciences and Humanities, Munich, Germany; Department of Geosciences, University of Bremen, Bremen, Germany; Department of Geosciences, University of Göttingen, Göttingen, Germany
推荐引用方式 GB/T 7714	Smith E.C.,Hattermann T.,Kuhn G.,et al. Detailed Seismic Bathymetry Beneath Ekström Ice Shelf; Antarctica: Implications for Glacial History and Ice-Ocean Interaction[J],2020,47(10).
APA	Smith E.C..,Hattermann T..,Kuhn G..,Gaedicke C..,Berger S..,...&Eisen O..(2020).Detailed Seismic Bathymetry Beneath Ekström Ice Shelf; Antarctica: Implications for Glacial History and Ice-Ocean Interaction.Geophysical Research Letters,47(10).
MLA	Smith E.C.,et al."Detailed Seismic Bathymetry Beneath Ekström Ice Shelf; Antarctica: Implications for Glacial History and Ice-Ocean Interaction".Geophysical Research Letters 47.10(2020).