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

The role of channelized basal melt in ice-shelf stability: recent progress and future priorities
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通道化基底融化在冰架稳定性中的作用:近期进展和未来优先事项

DOI:
10.1017/aog.2023.5
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发表时间:
2023
影响因子:
2.9
通讯作者:
Alley, Richard B.
Alley, Richard B.
中科院分区:
地球科学4区
文献类型:
--
作者:
Alley, Karen E.;Scambos, Ted A.;Alley, Richard B.

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基底通道在南极冰架上广泛存在,它是由浮力的海水和融水向上雕刻成冰架底部的沟槽形成的。这些特征的形成通过影响浮力羽流来调节冰架基底融化,并通过应变集中和与裂缝的相互作用来影响结构稳定性。由于这些影响,并且由于基底通道可以在与冰架演化相似的时间尺度上迅速变化,因此限制基底通道对冰架的影响对于预测未来冰架的不稳定和退缩是必要的。我们建议未来的研究重点应该包括限制基底通道变化的模式和速率,确定基底融化的机制和详细模式,以及量化与通道相关的断裂对冰架稳定性的影响。
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.
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期刊: Science advances
影响因子: 13.6
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