DOI: 10.5194/tc-11-2799-2017
Scopus记录号: 2-s2.0-85038230324
论文题名: A continuum model for meltwater flow through compacting snow
作者: Meyer C ; R ; , Hewitt I ; J
刊名: Cryosphere
ISSN: 19940416
出版年: 2017
卷: 11, 期: 6 起始页码: 2799
结束页码: 2813
语种: 英语
英文关键词: compaction
; Darcy law
; freezing
; glacial hydrology
; glacier
; heat transfer
; hydrological modeling
; ice sheet
; latent heat flux
; melting
; meltwater
; percolation
; runoff
; seasonal variation
; snow
; temperature profile
; warming
; water flow
; water storage
英文摘要: Melt water is produced on the surface of glaciers and ice sheets when the seasonal energy forcing warms the snow to its melting temperature. This meltwater percolates into the snow and subsequently runs off laterally in streams, is stored as liquid water, or refreezes, thus warming the subsurface through the release of latent heat. We present a continuum model for the percolation process that includes heat conduction, meltwater percolation and refreezing, as well as mechanical compaction. The model is forced by surface mass and energy balances, and the percolation process is described using Darcy's law, allowing for both partially and fully saturated pore space. Water is allowed to run off from the surface if the snow is fully saturated. The model outputs include the temperature, density, and water-content profiles and the surface runoff and water storage. We compare the propagation of freezing fronts that occur in the model to observations from the Greenland Ice Sheet. We show that the model applies to both accumulation and ablation areas and allows for a transition between the two as the surface energy forcing varies. The largest average firn temperatures occur at intermediate values of the surface forcing when perennial water storage is predicted. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75464
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: John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; Mathematical Institute, Woodstock Road, Oxford, United Kingdom
Recommended Citation:
Meyer C,R,, Hewitt I,et al. A continuum model for meltwater flow through compacting snow[J]. Cryosphere,2017-01-01,11(6)