Modeling Antarctic tides in response to ice shelf thinning and retreat
Modeling Antarctic tides in response to ice shelf thinning and retreat
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DOI：
10.1002/2013jc009240
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发表时间：
2014
影响因子：
--
通讯作者：
S. Rosier;J. Green;J. Scourse;R. Winkelmann
中科院分区：
文献类型：
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作者：
S. Rosier;J. Green;J. Scourse;R. Winkelmann
潮汐通过调节冰流速度、破裂、移动冰架和混合冰架下的水，在冰盖动力学中起着重要作用。冰架范围或厚度的任何变化都会通过改变水柱厚度和海岸地形而改变潮汐动力学，但这些变化反过来又会反馈到冰架的整体稳定性。在这里，我们表明，罗斯和罗恩-费尔奇纳冰架的范围和/或厚度的移除或减少将对南极洲周围的潮汐产生重大影响。Ronne-Filchner冰架显得特别脆弱，在大部分冰架下方M2振幅增加超过0.5 m，可能导致由潮汐引起的冰架/冰盖动力学反馈。这些结果强调了了解冰架/溪流潮汐反馈的重要性，因为它们对冰盖动力学的影响。
[1] Tides play an important role in ice sheet dynamics by modulating ice stream velocity, fracturing, and moving ice shelves and mixing water beneath them. Any changes in ice shelf extent or thickness will alter the tidal dynamics through modification of water column thickness and coastal topography but these will in turn feed back onto the overall ice shelf stability. Here, we show that removal or reduction in extent and/or thickness of the Ross and Ronne-Filchner ice shelves would have a significant impact on the tides around Antarctica. The Ronne-Filchner appears particularly vulnerable, with an increase in M2 amplitude of over 0.5 m beneath much of the ice shelf potentially leading to tidally induced feedbacks on ice shelf/sheet dynamics. These results highlight the importance of understanding tidal feedbacks on ice shelves/streams due to their influence on ice sheet dynamics.