GHOSTly flute music: drumlins, moats and the bed of Thwaites Glacier
GHOSTly flute music: drumlins, moats and the bed of Thwaites Glacier
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幽灵般的长笛音乐：鼓鼓、护城河和思韦茨冰川河床
DOI：
10.1017/aog.2023.43
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发表时间：
2022
影响因子：
2.9
通讯作者：
Stevens, Nathan T.
中科院分区：
文献类型：
--
作者：
Alley, Richard B.;Holschuh, Nick;Parizek, Byron;Zoet, Lucas K.;Riverman, Kiya;Muto, Atsuhiro;Christianson, Knut;Clyne, Elisabeth;Anandakrishnan, Sridhar;Stevens, Nathan T.
鲜为人知且难以模拟的冰川床特征对于预测强烈变暖情况下冰盖变化导致的海平面上升非常重要，特别是在南极洲西部的思韦茨冰川排水系统中。海洋变暖可能导致冰架变薄或消失，或河口区冰变薄，从而减少接地冰的背压。模型表明，作为响应，更接近塑性的河床通过引起更大的流动加速度而有利于更快的冰损失，但更接近粘性的河床有利于局部近海岸变薄，这可能会加速接地区退回到内部盆地，在那里海洋冰盖不稳定或悬崖不稳定可能会发展并导致非常快速的冰损失。对现有数据的解释表明，该床在空间上是镶嵌的，具有粘性区域和塑性区域。逆着基岩地形的水流去除了塑料润滑耕地，暴露了在障碍物的冰川上侧被侵蚀的基岩，形成护城河，暴露的基岩尾部延伸到邻近背风侧软耕地床形状的冰川下方。逆地形流动还会产生高冰压区域，防止润滑水流入与障碍物尺寸成比例的距离。将现有观测扩展到足够大的区域，并开发以适当规模吸收这些数据的模型，提出了必须应对的巨大而重要的研究挑战，以可靠地预测未来的强迫海平面上升。
Glacier-bed characteristics that are poorly known and modeled are important in projected sea-level rise from ice-sheet changes under strong warming, especially in the Thwaites Glacier drainage of West Antarctica. Ocean warming may induce ice-shelf thinning or loss, or thinning of ice in estuarine zones, reducing backstress on grounded ice. Models indicate that, in response, more-nearly-plastic beds favor faster ice loss by causing larger flow acceleration, but more-nearly-viscous beds favor localized near-coastal thinning that could speed grounding-zone retreat into interior basins where marine-ice-sheet instability or cliff instability could develop and cause very rapid ice loss. Interpretation of available data indicates that the bed is spatially mosaicked, with both viscous and plastic regions. Flow against bedrock topography removes plastic lubricating tills, exposing bedrock that is eroded on up-glacier sides of obstacles to form moats with exposed bedrock tails extending downglacier adjacent to lee-side soft-till bedforms. Flow against topography also generates high-ice-pressure zones that prevent inflow of lubricating water over distances that scale with the obstacle size. Extending existing observations to sufficiently large regions, and developing models assimilating such data at the appropriate scale, present large, important research challenges that must be met to reliably project future forced sea-level rise.
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冰震条纹与南极冰流下方潜在的巨型冰川线条有关
影响因子：
5.8
作者：
C. G. Barcheck;S. Schwartz;S. Tulaczyk
通讯作者：
S. Tulaczyk
对西南极洲思韦茨冰川退缩过程中河床控制的模型分析
影响因子：
3.4
作者：
Schwans, Emily;Parizek, Byron R.;Alley, Richard B.;Anandakrishnan, Sridhar;Morlighem, Mathieu M.
通讯作者：
Morlighem, Mathieu M.
影响因子：
5.3
作者：
Alley, Richard B.;Li, Wenjie;Parizek, Byron R.;Zhang, Fuqing
通讯作者：
Zhang, Fuqing
冰山崩解：制度和转变
DOI：
10.1146/annurev-earth-032320-110916
发表时间：
2023
影响因子：
14.9
作者：
Alley, R.B.;Cuffey, K.M.;Bassis, J.N.;Alley, K.E.;Wang, S.;Parizek, B.R.;Anandakrishnan, S.;Christianson, K.;DeConto, R.M.
通讯作者：
DeConto, R.M.
影响因子：
5.2
作者：
L. Zoet;M. Ikari;R. Alley;C. Marone;S. Anandakrishnan;B. Carpenter;M. Scuderi
通讯作者：
L. Zoet;M. Ikari;R. Alley;C. Marone;S. Anandakrishnan;B. Carpenter;M. Scuderi