Swirls and scoops: Ice base melt revealed by multibeam imagery of an Antarctic ice shelf

被引：4

作者：

Wahlin, Anna ^{[1
]}

Alley, Karen E. ^{[2
]}

Begeman, Carolyn ^{[3
]}

Hegrenaes, Oyvind ^{[4
]}

Yuan, Xiaohan ^{[1
,5
]}

Graham, Alastair G. C. ^{[6
]}

Hogan, Kelly ^{[7
]}

Davis, Peter E. D. ^{[7
]}

Dotto, Tiago S. ^{[8
]}

Eayrs, Clare ^{[9
]}

Hall, Robert A. ^{[10
]}

Holland, David M. ^{[11
]}

Kim, Tae Wan ^{[9
]}

Larter, Robert D. ^{[7
]}

Ling, Li ^{[12
]}

Muto, Atsuhiro ^{[13
]}

Pettit, Erin C. ^{[14
]}

Schmidt, Britney E. ^{[15
,16
]}

Snow, Tasha ^{[17
]}

Stedt, Filip ^{[1
]}

Washam, Peter M. ^{[15
,16
]}

Wahlgren, Stina ^{[1
]}

Wild, Christian ^{[18
]}

Wellner, Julia ^{[19
]}

Zheng, Yixi ^{[10
]}

Heywood, Karen J. ^{[10
]}

机构：

[1] Univ Gothenburg, Dept Marine Sci, Gothenburg, Sweden

[2] Univ Manitoba, Ctr Earth Observat Sci, Winnipeg, MB, Canada

[3] Los Alamos Natl Lab, Fluid Dynam & Solid Mech, Los Alamos, NM USA

[4] Kongsberg Discovery, Dept Uncrewed Platforms, Horten, Norway

[5] Tongji Univ, Coll Surveying & Geoinformat, Shanghai, Peoples R China

[6] Cardiff Univ, Sch Earth & Environm Sci, Main Bldg,Pk Pl, Cardiff CF10 3AT, Wales

[7] British Antarctic Survey, Cambridge, England

[8] Natl Oceanog Ctr, Southampton, England

[9] Korea Polar Res Inst, Incheon, South Korea

[10] Univ East Anglia, Ctr Ocean & Atmospher Sci, Sch Environm Sci, Norwich, England

[11] NYU, Environm Fluid Dynam Lab, New York, NY USA

[12] KTH Royal Inst Technol, Div Robot Percept & Learning, Stockholm, Sweden

[13] Temple Univ, Dept Earth & Environm Sci, Philadelphia, PA USA

[14] Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR USA

[15] Cornell Univ, Dept Astron, Ithaca, NY USA

[16] Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY USA

[17] Colorado Sch Mines, Dept Geophys, 1500 Illinois St, Golden, CO USA

[18] Univ Tubingen, Dept Geosci, Tubingen, Germany

[19] Univ Houston, Dept Earth & Atmospher Sci, Houston, TX USA

来源：

SCIENCE ADVANCES | 2024年 / 10卷 / 31期

基金：

瑞典研究理事会; 美国国家科学基金会; 加拿大自然科学与工程研究理事会; 英国自然环境研究理事会;

关键词：

CIRCUMPOLAR DEEP-WATER; BENEATH; DRIVEN; MODEL; VARIABILITY; STABILITY; THWAITES; RETREAT; CONVECTION; NAVIGATION;

D O I：

10.1126/sciadv.adn9188

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Knowledge gaps about how the ocean melts Antarctica's ice shelves, borne from a lack of observations, lead to large uncertainties in sea level predictions. Using high-resolution maps of the underside of Dotson Ice Shelf, West Antarctica, we reveal the imprint that ice shelf basal melting leaves on the ice. Convection and intermittent warm water intrusions form widespread terraced features through slow melting in quiescent areas, while shear-driven turbulence rapidly melts smooth, eroded topographies in outflow areas, as well as enigmatic teardrop-shaped indentations that result from boundary-layer flow rotation. Full-thickness ice fractures, with bases modified by basal melting and convective processes, are observed throughout the area. This new wealth of processes, all active under a single ice shelf, must be considered to accurately predict future Antarctic ice shelf melt.

引用

页数：14

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