气候变化领域集成服务门户(CCPortal): Brief communication: Candidate sites of 1.5 Myr old ice 37km southwest of the Dome C summit, East Antarctica

CCPortal

DOI	10.5194/tc-12-2167-2018
	Brief communication: Candidate sites of 1.5 Myr old ice 37km southwest of the Dome C summit, East Antarctica
	Passalacqua O.; Cavitte M.; Gagliardini O.; Gillet-Chaulet F.; Parrenin F.; Ritz C.; Young D.
发表日期	2018
ISSN	19940416
卷号	12 期号:6
英文摘要	The search for ice as old as 1.5ĝ€Myr requires the identification of places that maximize our chances to retrieve old, well-resolved, undisturbed and datable ice. One of these locations is very likely southwest of the Dome C summit, where elevated bedrock makes the ice thin enough to limit basal melting. A 3-D ice flow simulation is used to calculate five selection criteria, which together delineate the areas with the most appropriate glaciological properties. These selected areas (a few square kilometers) lie on the flanks of a bedrock high, where a balance is found between risks of basal melting, stratigraphic disturbances and sufficient age resolution. Within these areas, several sites of potential 1.5ĝ€Myr old ice are proposed, situated on local bedrock summits or ridges. The trajectories of the ice particles towards these locations are short, and the ice flows over a smoothly undulating bedrock. These sites will help to choose where new high-resolution ground radar surveys should be conducted in upcoming field seasons. © 2018 Copernicus GmbH. All rights reserved.
学科领域	bedrock; glaciology; ice flow; ice ridge; radar; simulation; stratigraphy; Antarctica; Dome Concordia; East Antarctica
语种	英语
scopus关键词	bedrock; glaciology; ice flow; ice ridge; radar; simulation; stratigraphy; Antarctica; Dome Concordia; 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/119119
作者单位	Université Grenoble Alpes, CNRS, IRD, Grenoble, 38000, France; University of Texas Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States
推荐引用方式 GB/T 7714	Passalacqua O.,Cavitte M.,Gagliardini O.,et al. Brief communication: Candidate sites of 1.5 Myr old ice 37km southwest of the Dome C summit, East Antarctica[J],2018,12(6).
APA	Passalacqua O..,Cavitte M..,Gagliardini O..,Gillet-Chaulet F..,Parrenin F..,...&Young D..(2018).Brief communication: Candidate sites of 1.5 Myr old ice 37km southwest of the Dome C summit, East Antarctica.Cryosphere,12(6).
MLA	Passalacqua O.,et al."Brief communication: Candidate sites of 1.5 Myr old ice 37km southwest of the Dome C summit, East Antarctica".Cryosphere 12.6(2018).