Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41586-020-2014-5 |
Ice front blocking of ocean heat transport to an Antarctic ice shelf | |
Alexandrov, Ludmil B.1; Kim, Jaegil2; Haradhvala, Nicholas J.2,3; Huang, Mi Ni4,5; Ng, Alvin Wei Tian4,5; Wu, Yang4,5; Boot, Arnoud4,5; Covington, Kyle R.6,7; Gordenin, Dmitry A.8; Bergstrom, Erik N.1; Islam, S. M. Ashiqul1; Lopez-Bigas, Nuria9,10,11; Klimczak, Leszek J.12; McPherson, John R.4,5; Morganella, Sandro13; Sabarinathan, Radhakrishnan10,14,15; Wheeler, David A.6,16; Mustonen, Ville17,18,19; Getz, Gad2,3,20,21; Rozen, Steven G.4,5,22; Stratton, Michael R.13 | |
2020-02-26 | |
发表期刊 | NATURE
![]() |
ISSN | 0028-0836 |
EISSN | 1476-4687 |
出版年 | 2020 |
卷号 | 578期号:7796页码:568-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Norway; Germany; South Korea; Australia; England; France |
英文关键词 | The front of the Getz Ice Shelf in West Antarctica creates an abrupt topographic step that deflects ocean currents, suppressing 70% of the heat delivery to the ice sheet. Mass loss from the Antarctic Ice Sheet to the ocean has increased in recent decades, largely because the thinning of its floating ice shelves has allowed the outflow of grounded ice to accelerate(1,2). Enhanced basal melting of the ice shelves is thought to be the ultimate driver of change(2,3), motivating a recent focus on the processes that control ocean heat transport onto and across the seabed of the Antarctic continental shelf towards the ice(4-6). However, the shoreward heat flux typically far exceeds that required to match observed melt rates(2,7,8), suggesting that other critical controls exist. Here we show that the depth-independent (barotropic) component of the heat flow towards an ice shelf is blocked by the marked step shape of the ice front, and that only the depth-varying (baroclinic) component, which is typically much smaller, can enter the sub-ice cavity. Our results arise from direct observations of the Getz Ice Shelf system and laboratory experiments on a rotating platform. A similar blocking of the barotropic component may occur in other areas with comparable ice-bathymetry configurations, which may explain why changes in the density structure of the water column have been found to be a better indicator of basal melt rate variability than the heat transported onto the continental shelf(9). Representing the step topography of the ice front accurately in models is thus important for simulating ocean heat fluxes and induced melt rates. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000516571100018 |
WOS关键词 | CIRCUMPOLAR DEEP-WATER ; CIRCULATION ; DRIVEN ; RETREAT ; BENEATH ; INFLOW |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/249263 |
专题 | 地球科学 资源环境科学 |
作者单位 | 1.Univ Calif San Diego, Dept Cellular & Mol Med, Dept Bioengn, Moores Canc Ctr, San Diego, CA 92103 USA; 2.Broad Inst MIT & Harvard, Cambridge, MA 02142 USA; 3.Massachusetts Gen Hosp, Ctr Canc Res, Boston, MA 02114 USA; 4.Duke NUS Med Sch, Programme Canc & Stem Cell Biol, Singapore, Singapore; 5.Duke NUS Med Sch, Ctr Computat Biol, Singapore, Singapore; 6.Baylor Coll Med, Human Genome Sequencing Ctr, Houston, TX 77030 USA; 7.Baylor Coll Med, Duncan L Canc Ctr, Houston, TX 77030 USA; 8.NIEHS, Genome Integr & Struct Biol Lab, Durham, NC USA; 9.Barcelona Inst Sci & Technol, Inst Res Biomed IRB Barcelona, Barcelona, Spain; 10.Univ Pompeu Fabra, Res Program Biomed Informat, Barcelona, Spain; 11.ICREA, Barcelona, Spain; 12.NIEHS, Integrat Bioinformat Support Grp, Durham, NC USA; 13.Wellcome Sanger Inst, Hinxton, England; 14.Tata Inst Fundamental Res, Natl Ctr Biol Sci, Bangalore, Karnataka, India; 15.Inst Res Biomed IRB Barcelona, Barcelona, Spain; 16.Baylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030 USA; 17.Univ Helsinki, Dept Comp Sci, Helsinki, Finland; 18.Univ Helsinki, Organismal & Evolutionary Biol Res Programme, Helsinki, Finland; 19.Univ Helsinki, Inst Biotechnol, Helsinki, Finland; 20.Massachusetts Gen Hosp, Dept Pathol, Boston, MA 02114 USA; 21.Harvard Med Sch, Boston, MA 02115 USA; 22.Natl Heart Ctr Singapore, Duke NUS Inst Precis Med, SingHlth, Singapore, Singapore |
推荐引用方式 GB/T 7714 | Alexandrov, Ludmil B.,Kim, Jaegil,Haradhvala, Nicholas J.,et al. Ice front blocking of ocean heat transport to an Antarctic ice shelf[J]. NATURE,2020,578(7796):568-+. |
APA | Alexandrov, Ludmil B..,Kim, Jaegil.,Haradhvala, Nicholas J..,Huang, Mi Ni.,Ng, Alvin Wei Tian.,...&Stratton, Michael R..(2020).Ice front blocking of ocean heat transport to an Antarctic ice shelf.NATURE,578(7796),568-+. |
MLA | Alexandrov, Ludmil B.,et al."Ice front blocking of ocean heat transport to an Antarctic ice shelf".NATURE 578.7796(2020):568-+. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论