DOI: 10.5194/tc-7-229-2013
Scopus记录号: 2-s2.0-84873615558
论文题名: Restoring mass conservation to shallow ice flow models over complex terrain
作者: Jarosch A ; H ; , Schoof C ; G ; , Anslow F ; S
刊名: Cryosphere
ISSN: 19940416
出版年: 2013
卷: 7, 期: 1 起始页码: 229
结束页码: 240
语种: 英语
英文关键词: bedrock
; complex terrain
; glacier dynamics
; ice flow
; mass balance
; mass transfer
; mountain region
; numerical model
英文摘要: Numerical simulation of glacier dynamics in mountainous regions using zero-order, shallow ice models is desirable for computational efficiency so as to allow broad coverage. However, these models present several difficulties when applied to complex terrain. One such problem arises where steep terrain can spuriously lead to large ice fluxes that remove more mass from a grid cell than it originally contains, leading to mass conservation being violated. This paper describes a vertically integrated, shallow ice model using a second-order flux-limiting spatial discretization scheme that enforces mass conservation. An exact solution to ice flow over a bedrock step is derived for a given mass balance forcing as a benchmark to evaluate the model performance in such a difficult setting. This benchmark should serve as a useful test for modellers interested in simulating glaciers over complex terrain. © Author(s) 2013. CC Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75002
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: Centre for Climate and Cryosphere, Institute of Meteorology and Geophysics, University of Innsbruck, Innsbruck, Austria; Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, Canada; Pacific Climate Impacts Consortium, University of Victoria, Victoria, Canada
Recommended Citation:
Jarosch A,H,, Schoof C,et al. Restoring mass conservation to shallow ice flow models over complex terrain[J]. Cryosphere,2013-01-01,7(1)