Constraints on the δ 2 H diffusion rate in firn from field measurements at Summit, Greenland
We performed detailed 2 H 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 2 H-enriched water over a 6 × 6 m 2 area. We followed the diffusion process, quantified as the increase of the δ 2 H diffusion length, ove...
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ftdoajarticles:oai:doaj.org/article:fc17065feb82472689e5d71901f3967e 2023-05-15T16:27:27+02:00 Constraints on the δ 2 H diffusion rate in firn from field measurements at Summit, Greenland L. G. van der Wel H. A. Been R. S. W. van de Wal C. J. P. P. Smeets H. A. J. Meijer 2015-05-01T00:00:00Z https://doi.org/10.5194/tc-9-1089-2015 https://doaj.org/article/fc17065feb82472689e5d71901f3967e EN eng Copernicus Publications http://www.the-cryosphere.net/9/1089/2015/tc-9-1089-2015.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-9-1089-2015 https://doaj.org/article/fc17065feb82472689e5d71901f3967e The Cryosphere, Vol 9, Iss 3, Pp 1089-1103 (2015) Environmental sciences GE1-350 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/tc-9-1089-2015 2022-12-31T11:35:19Z We performed detailed 2 H 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 2 H-enriched water over a 6 × 6 m 2 area. We followed the diffusion process, quantified as the increase of the δ 2 H 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 δ 2 H 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 Directory of Open Access Journals: DOAJ Articles Greenland The Cryosphere 9 3 1089 1103 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 L. G. van der Wel H. A. Been R. S. W. van de Wal C. J. P. P. Smeets H. A. J. Meijer Constraints on the δ 2 H diffusion rate in firn from field measurements at Summit, Greenland |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
We performed detailed 2 H 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 2 H-enriched water over a 6 × 6 m 2 area. We followed the diffusion process, quantified as the increase of the δ 2 H 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 δ 2 H 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 |
L. G. van der Wel H. A. Been R. S. W. van de Wal C. J. P. P. Smeets H. A. J. Meijer |
author_facet |
L. G. van der Wel H. A. Been R. S. W. van de Wal C. J. P. P. Smeets H. A. J. Meijer |
author_sort |
L. G. van der Wel |
title |
Constraints on the δ 2 H diffusion rate in firn from field measurements at Summit, Greenland |
title_short |
Constraints on the δ 2 H diffusion rate in firn from field measurements at Summit, Greenland |
title_full |
Constraints on the δ 2 H diffusion rate in firn from field measurements at Summit, Greenland |
title_fullStr |
Constraints on the δ 2 H diffusion rate in firn from field measurements at Summit, Greenland |
title_full_unstemmed |
Constraints on the δ 2 H diffusion rate in firn from field measurements at Summit, Greenland |
title_sort |
constraints on the δ 2 h 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://doaj.org/article/fc17065feb82472689e5d71901f3967e |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland The Cryosphere |
genre_facet |
Greenland The Cryosphere |
op_source |
The Cryosphere, Vol 9, Iss 3, Pp 1089-1103 (2015) |
op_relation |
http://www.the-cryosphere.net/9/1089/2015/tc-9-1089-2015.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-9-1089-2015 https://doaj.org/article/fc17065feb82472689e5d71901f3967e |
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 |
container_start_page |
1089 |
op_container_end_page |
1103 |
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