气候变化领域集成服务门户(CCPortal): Tidal bending of ice shelves as a mechanism for large-scale temporal variations in ice flow

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DOI	10.5194/tc-12-1699-2018
	Tidal bending of ice shelves as a mechanism for large-scale temporal variations in ice flow
	Rosier S.H.R.; Gudmundsson G.H.
发表日期	2018
ISSN	19940416
卷号	12 期号:5
英文摘要	GPS measurements reveal strong modulation of horizontal ice shelf and ice stream flow at a variety of tidal frequencies, most notably a fortnightly (Msf) frequency not present in the vertical tides themselves. Current theories largely fail to explain the strength and prevalence of this signal over floating ice shelves. We show how well-known non-linear aspects of ice rheology can give rise to widespread, long-periodic tidal modulation in ice shelf flow, generated within ice shelves themselves through tidal flexure acting at diurnal and semidiurnal frequencies. Using full-Stokes viscoelastic modelling, we show that inclusion of tidal bending within the model accounts for much of the observed tidal modulation of ice shelf flow. Furthermore, our model shows that, in the absence of vertical tidal forcing, the mean flow of the ice shelf is reduced by almost 30% for the geometry that we consider. © Author(s) 2018.
学科领域	bending; floating ice; GPS; ice flow; ice shelf; ice stream; rheology; streamflow; temporal variation; viscoelasticity
语种	英语
scopus关键词	bending; floating ice; GPS; ice flow; ice shelf; ice stream; rheology; streamflow; temporal variation; viscoelasticity
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119148
作者单位	Department of Geography and Environmental Sciences, Northumbria University, Newcastle-upon-Tyne, NE1 8ST, United Kingdom
推荐引用方式 GB/T 7714	Rosier S.H.R.,Gudmundsson G.H.. Tidal bending of ice shelves as a mechanism for large-scale temporal variations in ice flow[J],2018,12(5).
APA	Rosier S.H.R.,&Gudmundsson G.H..(2018).Tidal bending of ice shelves as a mechanism for large-scale temporal variations in ice flow.Cryosphere,12(5).
MLA	Rosier S.H.R.,et al."Tidal bending of ice shelves as a mechanism for large-scale temporal variations in ice flow".Cryosphere 12.5(2018).