globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-9-1089-2015
Scopus记录号: 2-s2.0-84930207542
论文题名:
Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland
作者: Van Der Wel L; G; , Been H; A; , Van De Wal R; S; W; , Smeets C; J; P; P; , Meijer H; A; J
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期:3
起始页码: 1089
结束页码: 1103
语种: 英语
英文关键词: diffusion ; field survey ; firn ; hydrogen isotope ; ice core ; tortuosity ; Arctic ; Greenland ; Summit
英文摘要: We performed detailed 2H isotope diffusion measurements in the upper 3 m of firn at Summit, Greenland. Using a small snow gun, a thin snow layer was formed from 2H-enriched water over a 6 × 6 m2 area. We followed the diffusion process, quantified as the increase of the δ2H diffusion length, over a 4-year period, by retrieving the layer once per year by drilling a firn core and slicing it into 1 cm layers and measuring the δ2H signal of these layers. We compared our experimental findings to calculations based on the model by Johnsen et al. (2000) and found substantial differences. The diffusion length in our experiments increased much less over the years than in the model. We discuss the possible causes for this discrepancy and conclude that several aspects of the diffusion process in firn are still poorly constrained, in particular the tortuosity. © Author(s) 2015.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75293
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 Isotope Research (CIO), Energy and Sustainability Research Institute Groningen (ESRIG), University of Groningen, Groningen, Netherlands; Institute for Marine and Atmospheric Research Utrecht (IMAU), University of Utrecht, Utrecht, Netherlands; Institute of Climate and Environmental Physics, University of Bern, Bern, Switzerland

Recommended Citation:
Van Der Wel L,G,, Been H,et al. Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland[J]. Cryosphere,2015-01-01,9(3)
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