DOI: 10.1002/2013GL058389
论文题名: Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet
作者: Munneke P.K. ; Ligtenberg S.R.M. ; Van Den Broeke M.R. ; Van Angelen J.H. ; Forster R.R.
刊名: Geophysical Research Letters
ISSN: 0094-10434
EISSN: 1944-10165
出版年: 2014
卷: 41, 期: 2 起始页码: 476
结束页码: 483
语种: 英语
英文关键词: firn
; greenland
; hydrology
; melt
; surface mass balance
Scopus关键词: Aquifers
; Glacial geology
; Glaciers
; Hydrology
; Melting
; Thermodynamics
; Accumulation rates
; firn
; Greenland
; Greenland Ice Sheet
; One dimension
; Subsurface liquid
; Surface mass balance
; Winter seasons
; Liquids
; accumulation rate
; aquifer
; cryosphere
; firn
; GRIP
; ice sheet
; mass balance
; melting
; permafrost
; pore space
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: Recent observations have shown that the firn layer on the Greenland Ice Sheet features subsurface bodies of liquid water at the end of the winter season. Using a model with basic firn hydrology, thermodynamics, and compaction in one dimension, we find that a combination of moderate to strong surface melt and a high annual accumulation rate is required to form such a perennial firn aquifer. The high accumulation rate ensures that there is pore space available to store water at a depth where it is protected from the winter cold. Low-accumulation sites cannot provide sufficiently deep pore space to store liquid water. However, for even higher accumulation rates, the total cold content of the winter accumulation becomes sufficient to refreeze the total amount of liquid water. As a consequence, wintertime or springtime observations of subsurface liquid water in these specific accumulation conditions cannot distinguish between a truly perennial firn aquifer and water layers that will ultimately refreeze completely. ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892644909&doi=10.1002%2f2013GL058389&partnerID=40&md5=eff5dd3ffac9908fddb1535fb49fcfde
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7698
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, Netherlands
Recommended Citation:
Munneke P.K.,Ligtenberg S.R.M.,Van Den Broeke M.R.,et al. Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet[J]. Geophysical Research Letters,2014-01-01,41(2).