DOI: 10.5194/tc-12-189-2018
Scopus记录号: 2-s2.0-85040939852
论文题名: Modelling debris transport within glaciers by advection in a full-Stokes ice flow model
作者: Wirbel A ; , Jarosch A ; H ; , Nicholson L
刊名: Cryosphere
ISSN: 19940416
出版年: 2018
卷: 12, 期: 1 起始页码: 189
结束页码: 204
语种: 英语
英文关键词: advection
; climate forcing
; debris flow
; glacial deposit
; glacier mass balance
; heterogeneity
; ice flow
; prediction
; proxy climate record
; runoff
; sea level change
; spatiotemporal analysis
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75437
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Institute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria; Institute of Earth Sciences, University of Iceland, Reykjavík, Iceland
Recommended Citation:
Wirbel A,, Jarosch A,H,et al. Modelling debris transport within glaciers by advection in a full-Stokes ice flow model[J]. Cryosphere,2018-01-01,12(1)