GSTDTAP  > 地球科学
DOI10.1038/s41561-019-0510-8
Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet
Morlighem, Mathieu1; Rignot, Eric1,2; Binder, Tobias3; Blankenship, Donald4; Drews, Reinhard3,5; Eagles, Graeme3; Eisen, Olaf3,6; Ferraccioli, Fausto7; Forsberg, Rene8; Fretwell, Peter7; Goel, Vikram9; Greenbaum, Jamin S.4; Gudmundsson, Hilmar10; Guo, Jingxue11; Helm, Veit3; Hofstede, Coen3; Howat, Ian12; Humbert, Angelika3,6; Jokat, Wilfried3; Karlsson, Nanna B.3,13; Lee, Won Sang14; Matsuoka, Kenichi15; Millan, Romain1; Mouginot, Jeremie1,16; Paden, John17; Pattyn, Frank18; Roberts, Jason19,20,21; Rosier, Sebastian; Ruppel, Antonia22; Seroussi, Helene2; Smith, Emma C.3; Steinhage, Daniel3; Sun, Bo11; van den Broeke, Michiel R.23; van Ommen, Tas D.19,20,21; van Wessem, Melchior23; Young, Duncan A.4
2020-02-01
发表期刊NATURE GEOSCIENCE
ISSN1752-0894
EISSN1752-0908
出版年2020
卷号13期号:2页码:132-+
文章类型Article
语种英语
国家USA; Germany; England; Denmark; India; Peoples R China; South Korea; Norway; France; Belgium; Australia; Netherlands
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.


领域地球科学 ; 气候变化
收录类别SCI-E
WOS记录号WOS:000519214500009
WOS关键词WEST ANTARCTICA ; THWAITES GLACIER ; BED TOPOGRAPHY ; PINE ISLAND ; RETREAT ; BATHYMETRY ; GREENLAND ; CLIMATE ; SURFACE
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/280383
专题地球科学
气候变化
作者单位1.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA;
2.CALTECH, Jet Prop Lab, Pasadena, CA USA;
3.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Bremerhaven, Germany;
4.UT Austin, Jackson Sch Geosci, Austin, TX USA;
5.Univ Tubingen, Dept Geosci, Tubingen, Germany;
6.Univ Bremen, Bremen, Germany;
7.British Antarctic Survey, Cambridge, England;
8.Tech Univ Denmark, Lyngby, Denmark;
9.Natl Ctr Polar & Ocean Res, Vasco, Goa, India;
10.Northumbria Univ, Newcastle Upon Tyne, Tyne & Wear, England;
11.Polar Res Inst China, Shanghai, Peoples R China;
12.Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA;
13.Geol Survey Denmark & Greenland, Copenhagen, Denmark;
14.Korea Polar Res Inst, Incheon, South Korea;
15.Norwegian Polar Res Inst, Tromso, Norway;
16.Univ Grenoble Alpes, CNRS, Inst Geosci Environm, Grenoble, France;
17.Univ Kansas, Ctr Remote Sensing Ice Sheets, Lawrence, KS 66045 USA;
18.Univ Libre Bruxelles, Brussels, Belgium;
19.Australian Antarctic Div, Kingston, Tas, Australia;
20.Antarctic Climate & Ecosyst Cooperat Res Ctr, Kingston, Tas, Australia;
21.Univ Tasmania, Inst Marine & Antarctic Studies, Hobart, Tas, Australia;
22.Federal Inst Geosci & Nat Resources, Hannover, NH, Germany;
23.Univ Utrecht, Inst Marine & Atmospher Res, Utrecht, Netherlands
推荐引用方式
GB/T 7714
Morlighem, Mathieu,Rignot, Eric,Binder, Tobias,et al. Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet[J]. NATURE GEOSCIENCE,2020,13(2):132-+.
APA Morlighem, Mathieu.,Rignot, Eric.,Binder, Tobias.,Blankenship, Donald.,Drews, Reinhard.,...&Young, Duncan A..(2020).Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet.NATURE GEOSCIENCE,13(2),132-+.
MLA Morlighem, Mathieu,et al."Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet".NATURE GEOSCIENCE 13.2(2020):132-+.
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