气候变化领域集成服务门户(CCPortal): Meltwater Penetration Through Temperate Ice Layers in the Percolation Zone at DYE-2; Greenland Ice Sheet

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DOI	10.1029/2020GL089211
	Meltwater Penetration Through Temperate Ice Layers in the Percolation Zone at DYE-2; Greenland Ice Sheet
	Samimi S.; Marshall S.J.; MacFerrin M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	Meltwater retention in the firn layer of the Greenland Ice Sheet has the potential to buffer sea level rise due to ice sheet melt. The capacity of the firn layer to store meltwater is unclear, however, because refrozen ice layers can act as impermeable barriers to meltwater percolation, promoting runoff rather than retention. We present time domain reflectometry and thermistor data, which demonstrate that meltwater successfully penetrates ice layers up to 12 cm thick in the near-surface firn at DYE-2, Greenland. Our observations indicate that ice layers within polar firn can be permeable when summer warming and latent heat release from meltwater refreezing raise firn temperatures to the melting point. The extent and depth of refreezing, as determined by the coupled thermodynamic and hydrological evolution in the firn, are more important than the presence of ice layers in governing meltwater infiltration and retention at our study site. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Dyes; Glaciers; Sea level; Solvents; Greenland Ice Sheet; Impermeable barriers; Latent heat release; Near surfaces; Sea level rise; Study sites; Summer warming; Time domain reflectometry; Ice; firn; freezing; ice sheet; meltwater; observational method; penetration; percolation; permeability; runoff; sea level change; surface temperature; thermodynamics; water retention; Arctic; Greenland; Greenland Ice Sheet
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169959
作者单位	Department of Geography, University of Calgary, Calgary, AB, Canada; Environment and Climate Change Canada, Gatineau, QC, Canada; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States
推荐引用方式 GB/T 7714	Samimi S.,Marshall S.J.,MacFerrin M.. Meltwater Penetration Through Temperate Ice Layers in the Percolation Zone at DYE-2; Greenland Ice Sheet[J],2020,47(15).
APA	Samimi S.,Marshall S.J.,&MacFerrin M..(2020).Meltwater Penetration Through Temperate Ice Layers in the Percolation Zone at DYE-2; Greenland Ice Sheet.Geophysical Research Letters,47(15).
MLA	Samimi S.,et al."Meltwater Penetration Through Temperate Ice Layers in the Percolation Zone at DYE-2; Greenland Ice Sheet".Geophysical Research Letters 47.15(2020).