气候变化领域集成服务门户(CCPortal): Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland

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DOI	10.5194/tc-9-1089-2015
	Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland
	Van Der Wel L.G.; Been H.A.; Van De Wal R.S.W.; Smeets C.J.P.P.; Meijer H.A.J.
发表日期	2015
ISSN	19940416
卷号	9 期号:3
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.
学科领域	diffusion; field survey; firn; hydrogen isotope; ice core; tortuosity; Arctic; Greenland; Summit
语种	英语
scopus关键词	diffusion; field survey; firn; hydrogen isotope; ice core; tortuosity; Arctic; Greenland; Summit
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119895
作者单位	Centre for Isotope Research (CIO), Energy and Sustainability Research Institute Groningen (ESRIG), University of Groningen, Groningen, 9747AG, Netherlands; Institute for Marine and Atmospheric Research Utrecht (IMAU), University of Utrecht, Utrecht, 3584 CC, Netherlands; Institute of Climate and Environmental Physics, University of Bern, Bern, 3012, Switzerland
推荐引用方式 GB/T 7714	Van Der Wel L.G.,Been H.A.,Van De Wal R.S.W.,et al. Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland[J],2015,9(3).
APA	Van Der Wel L.G.,Been H.A.,Van De Wal R.S.W.,Smeets C.J.P.P.,&Meijer H.A.J..(2015).Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland.Cryosphere,9(3).
MLA	Van Der Wel L.G.,et al."Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland".Cryosphere 9.3(2015).