Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL089088 |
Tidal grounding‐line migration modulated by subglacial hydrology | |
K. L. P. Warburton; D. R. Hewitt; J. A. Neufeld | |
2020-08-25 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | We present a mathematical model of the hydrology of grounding‐line migration on tidal timescales, in which the ice acts elastically, overlying a connected hydrological network, with the ocean tides modelled by an oscillating far‐field fluid height. The upstream grounding‐line migration is driven by a fluid pressure gradient through the grounding zone, while the downstream migration is limited by fluid drainage through the till. The two processes are described using separate travelling‐wave solutions, based on a model of fluid flow under an elastic sheet. The asymmetry between the up‐ and downstream motion allows the grounding line to act as a non‐linear filter on the tidal forcing as the pressure signal propagates upstream, and this frequency modulation is discussed in the context of velocity data from ice streams across Antarctica to provide a novel constraint on till permeability. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/293011 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | K. L. P. Warburton,D. R. Hewitt,J. A. Neufeld. Tidal grounding‐line migration modulated by subglacial hydrology[J]. Geophysical Research Letters,2020. |
APA | K. L. P. Warburton,D. R. Hewitt,&J. A. Neufeld.(2020).Tidal grounding‐line migration modulated by subglacial hydrology.Geophysical Research Letters. |
MLA | K. L. P. Warburton,et al."Tidal grounding‐line migration modulated by subglacial hydrology".Geophysical Research Letters (2020). |
条目包含的文件 | 条目无相关文件。 |
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