气候变化领域集成服务门户(CCPortal): Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet

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DOI	10.1038/s41561-019-0510-8
	Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet
	Morlighem M.; Rignot E.; Binder T.; Blankenship D.; Drews R.; Eagles G.; Eisen O.; Ferraccioli F.; Forsberg R.; Fretwell P.; Goel V.; Greenbaum J.S.; Gudmundsson H.; Guo J.; Helm V.; Hofstede C.; Howat I.; Humbert A.; Jokat W.; Karlsson N.B.; Lee W.S.; Matsuoka K.; Millan R.; Mouginot J.; Paden J.; Pattyn F.; Roberts J.; Rosier S.; Ruppel A.; Seroussi H.; Smith E.C.; Steinhage D.; Sun B.; Broeke M.R.; Ommen T.D.; Wessem M.; Young D.A.
发表日期	2020
ISSN	17520894
卷号	13 期号:2
英文摘要	The Antarctic ice sheet has been losing mass over past decades through the accelerated flow of its glaciers, conditioned by ocean temperature and bed topography. Glaciers retreating along retrograde slopes (that is, the bed elevation drops in the inland direction) are potentially unstable, while subglacial ridges slow down the glacial retreat. Despite major advances in the mapping of subglacial bed topography, significant sectors of Antarctica remain poorly resolved and critical spatial details are missing. Here we present a novel, high-resolution and physically based description of Antarctic bed topography using mass conservation. Our results reveal previously unknown basal features with major implications for glacier response to climate change. For example, glaciers flowing across the Transantarctic Mountains are protected by broad, stabilizing ridges. Conversely, in the marine basin of Wilkes Land, East Antarctica, we find retrograde slopes along Ninnis and Denman glaciers, with stabilizing slopes beneath Moscow University, Totten and Lambert glacier system, despite corrections in bed elevation of up to 1 km for the latter. This transformative description of bed topography redefines the high- and lower-risk sectors for rapid sea level rise from Antarctica; it will also significantly impact model projections of sea level rise from Antarctica in the coming centuries. © 2019, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.
语种	英语
scopus关键词	climate change; glacier; glacier retreat; ice sheet; sea level change; subglacial environment; Antarctic Ice Sheet; Antarctica; East Antarctica; Transantarctic Mountains; Wilkes Land
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124517
作者单位	Department of Earth System Science, University of California, Irvine, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Jackson School of Geosciences, UT Austin, Austin, TX, United States; Department of Geosciences, University of Tübingen, Tübingen, Germany; University of Bremen, Bremen, Germany; British Antarctic Survey, Cambridge, United Kingdom; Technical University of Denmark, Kongens Lyngby, Denmark; National Centre for Polar and Ocean Research, Vasco, Goa, India; Northumbria University, Newcastle upon Tyne, United Kingdom; Polar Research Institute of China, Shanghai, China; School of Earth Sciences, Ohio State University, Columbus, OH, United States; Geological Survey of Denmark and Greenland, Copenhagen, Denmark; Korea Polar Research Institute, Incheon, South Korea; Norwegian Polar Institute, Tromsø, Norway; Institut des Géosciences de l’Environ...
推荐引用方式 GB/T 7714	Morlighem M.,Rignot E.,Binder T.,et al. Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet[J],2020,13(2).
APA	Morlighem M..,Rignot E..,Binder T..,Blankenship D..,Drews R..,...&Young D.A..(2020).Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet.Nature Geoscience,13(2).
MLA	Morlighem M.,et al."Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet".Nature Geoscience 13.2(2020).