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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Copernicus Publications
2015
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fttriple:oai:gotriple.eu:oai:doaj.org/article:fc17065feb82472689e5d71901f3967e 2023-05-15T16:27:15+02:00 Constraints on the δ2H 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 2015-05-01 https://doi.org/10.5194/tc-9-1089-2015 http://www.the-cryosphere.net/9/1089/2015/tc-9-1089-2015.pdf https://doaj.org/article/fc17065feb82472689e5d71901f3967e en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-9-1089-2015 http://www.the-cryosphere.net/9/1089/2015/tc-9-1089-2015.pdf https://doaj.org/article/fc17065feb82472689e5d71901f3967e undefined The Cryosphere, Vol 9, Iss 3, Pp 1089-1103 (2015) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2015 fttriple https://doi.org/10.5194/tc-9-1089-2015 2023-01-22T19:12:34Z 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 Unknown Greenland The Cryosphere 9 3 1089 1103 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir 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 δ2H diffusion rate in firn from field measurements at Summit, Greenland |
topic_facet |
geo envir |
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 |
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 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 http://www.the-cryosphere.net/9/1089/2015/tc-9-1089-2015.pdf 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 |
1994-0416 1994-0424 doi:10.5194/tc-9-1089-2015 http://www.the-cryosphere.net/9/1089/2015/tc-9-1089-2015.pdf https://doaj.org/article/fc17065feb82472689e5d71901f3967e |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-9-1089-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
3 |
container_start_page |
1089 |
op_container_end_page |
1103 |
_version_ |
1766016370290458624 |