Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland
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...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00016419 2023-05-15T16:27:13+02:00 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. 2015-05 electronic https://doi.org/10.5194/tc-9-1089-2015 https://noa.gwlb.de/receive/cop_mods_00016419 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016374/tc-9-1089-2015.pdf https://tc.copernicus.org/articles/9/1089/2015/tc-9-1089-2015.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-9-1089-2015 https://noa.gwlb.de/receive/cop_mods_00016419 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016374/tc-9-1089-2015.pdf https://tc.copernicus.org/articles/9/1089/2015/tc-9-1089-2015.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2015 ftnonlinearchiv https://doi.org/10.5194/tc-9-1089-2015 2022-02-08T22:54:09Z 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. Article in Journal/Newspaper Greenland The Cryosphere Niedersächsisches Online-Archiv NOA Greenland The Cryosphere 9 3 1089 1103 |
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article Verlagsveröffentlichung van der Wel, L. G. Been, H. A. van de Wal, R. S. W. Smeets, C. J. P. P. Meijer, H. A. J. Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland |
topic_facet |
article Verlagsveröffentlichung |
description |
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. |
format |
Article in Journal/Newspaper |
author |
van der Wel, L. G. Been, H. A. van de Wal, R. S. W. Smeets, C. J. P. P. Meijer, H. A. J. |
author_facet |
van der Wel, L. G. Been, H. A. van de Wal, R. S. W. Smeets, C. J. P. P. Meijer, H. A. J. |
author_sort |
van der Wel, L. G. |
title |
Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland |
title_short |
Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland |
title_full |
Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland |
title_fullStr |
Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland |
title_full_unstemmed |
Constraints on the δ2H diffusion rate in firn from field measurements at Summit, Greenland |
title_sort |
constraints on the δ2h diffusion rate in firn from field measurements at summit, greenland |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-1089-2015 https://noa.gwlb.de/receive/cop_mods_00016419 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016374/tc-9-1089-2015.pdf https://tc.copernicus.org/articles/9/1089/2015/tc-9-1089-2015.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland The Cryosphere |
genre_facet |
Greenland The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-9-1089-2015 https://noa.gwlb.de/receive/cop_mods_00016419 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016374/tc-9-1089-2015.pdf https://tc.copernicus.org/articles/9/1089/2015/tc-9-1089-2015.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-9-1089-2015 |
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The Cryosphere |
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9 |
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3 |
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1089 |
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1103 |
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