The role of channelized basal melt in ice-shelf stability: recent progress and future priorities

被引:11
|
作者
Alley, Karen E. [1 ]
Scambos, Ted A. [2 ]
Alley, Richard B. [3 ,4 ]
机构
[1] Univ Manitoba, Dept Environm & Geog, Winnipeg, MB, Canada
[2] Univ Colorado Boulder, Cooperat Inst Res Environm Sci, Boulder, CO USA
[3] Penn State Univ, Earth & Environm Syst Inst, University Pk, PA USA
[4] Penn State Univ, Dept Geosci, University Pk, PA USA
基金
加拿大自然科学与工程研究理事会;
关键词
Ice shelves; ice; ocean interactions; ice-shelf break-up; PINE ISLAND GLACIER; OCEAN CIRCULATION; WARM WATER; BENEATH; EVOLUTION;
D O I
10.1017/aog.2023.5
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
Basal channels, which form where buoyant plumes of ocean water and meltwater carve troughs upwards into ice-shelf bases, are widespread on Antarctic ice shelves. The formation of these features modulates ice-shelf basal melt by influencing the flow of buoyant plumes, and influences structural stability through concentration of strain and interactions with fractures. Because of these effects, and because basal channels can change rapidly, on timescales similar to those of ice-shelf evolution, constraining the impacts of basal channels on ice shelves is necessary for predicting future ice-shelf destabilization and retreat. We suggest that future research priorities should include constraining patterns and rates of basal channel change, determining mechanisms and detailed patterns of basal melt, and quantifying the influence that channel-related fractures have on ice-shelf stability.
引用
收藏
页码:18 / 22
页数:5
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