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Constraints on the Δ2H Diffusion Rate in Firn from Field Measurements at Summit, Greenland : Volume 9, Issue 3 (22/05/2015)

By Van Der Wel, L. G.

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Book Id: WPLBN0003983483
Format Type: PDF Article :
File Size: Pages 15
Reproduction Date: 2015

Title: Constraints on the Δ2H Diffusion Rate in Firn from Field Measurements at Summit, Greenland : Volume 9, Issue 3 (22/05/2015)  
Author: Van Der Wel, L. G.
Volume: Vol. 9, Issue 3
Language: English
Subject: Science, Cryosphere
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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W. Van De Wa, R. S., Been, H. A., J. Meije, H. A., Van Der Wel, L. G., & P. P. Smeet, C. J. (2015). Constraints on the Δ2H Diffusion Rate in Firn from Field Measurements at Summit, Greenland : Volume 9, Issue 3 (22/05/2015). Retrieved from

Description: Centre for Isotope Research (CIO), Energy and Sustainability Research Institute Groningen (ESRIG), University of Groningen, 9747AG Groningen, the Netherlands. 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.

Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland

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