气候变化领域集成服务门户(CCPortal): Modelling debris transport within glaciers by advection in a full-Stokes ice flow model

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DOI	10.5194/tc-12-189-2018
	Modelling debris transport within glaciers by advection in a full-Stokes ice flow model
	Wirbel A.; Jarosch A.H.; Nicholson L.
发表日期	2018
ISSN	19940416
卷号	12 期号:1
英文摘要	Glaciers with extensive surface debris cover respond differently to climate forcing than those without supraglacial debris. In order to include debris-covered glaciers in projections of glaciogenic runoff and sea level rise and to understand the paleoclimate proxy recorded by such glaciers, it is necessary to understand the manner and timescales over which a supraglacial debris cover develops. Because debris is delivered to the glacier by processes that are heterogeneous in space and time, and these debris inclusions are altered during englacial transport through the glacier system, correctly determining where, when and how much debris is delivered to the glacier surface requires knowledge of englacial transport pathways and deformation. To achieve this, we present a model of englacial debris transport in which we couple an advection scheme to a full-Stokes ice flow model. The model performs well in numerical benchmark tests, and we present both 2-D and 3-D glacier test cases that, for a set of prescribed debris inputs, reproduce the englacial features, deformation thereof and patterns of surface emergence predicted by theory and observations of structural glaciology. In a future step, coupling this model to (i) a debris-aware surface mass balance scheme and (ii) a supraglacial debris transport scheme will enable the co-evolution of debris cover and glacier geometry to be modelled. © Author(s) 2018.
学科领域	advection; climate forcing; debris flow; glacial deposit; glacier mass balance; heterogeneity; ice flow; prediction; proxy climate record; runoff; sea level change; spatiotemporal analysis
语种	英语
scopus关键词	advection; climate forcing; debris flow; glacial deposit; glacier mass balance; heterogeneity; ice flow; prediction; proxy climate record; runoff; sea level change; spatiotemporal analysis
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/119235
作者单位	Institute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria; Institute of Earth Sciences, University of Iceland, Reykjavík, Iceland
推荐引用方式 GB/T 7714	Wirbel A.,Jarosch A.H.,Nicholson L.. Modelling debris transport within glaciers by advection in a full-Stokes ice flow model[J],2018,12(1).
APA	Wirbel A.,Jarosch A.H.,&Nicholson L..(2018).Modelling debris transport within glaciers by advection in a full-Stokes ice flow model.Cryosphere,12(1).
MLA	Wirbel A.,et al."Modelling debris transport within glaciers by advection in a full-Stokes ice flow model".Cryosphere 12.1(2018).