Controlled experiments on the diffusion rate of stable isotopes of water in artificial firn
We studied the diffusion rate of stable isotopes of water ice in a controlled laboratory experiment, where isotopically different layers of fabricated firn were stacked. This experiment was done in order to study the diffusion rate between the isotopically different layers and to compare the measure...
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ftunigroningenpu:oai:pure.rug.nl:publications/672ccd9f-cd38-4098-a887-83711be8a5c5 2024-06-02T08:07:33+00:00 Controlled experiments on the diffusion rate of stable isotopes of water in artificial firn Pohjola, V.A. Meijer, H.A.J. Sjöberg, A. 2007 https://hdl.handle.net/11370/672ccd9f-cd38-4098-a887-83711be8a5c5 https://research.rug.nl/en/publications/672ccd9f-cd38-4098-a887-83711be8a5c5 https://doi.org/10.3189/002214307784409379 eng eng https://research.rug.nl/en/publications/672ccd9f-cd38-4098-a887-83711be8a5c5 info:eu-repo/semantics/closedAccess Pohjola , V A , Meijer , H A J & Sjöberg , A 2007 , ' Controlled experiments on the diffusion rate of stable isotopes of water in artificial firn ' , Journal of Glaciology , vol. 53 , no. 183 , pp. 537-546 . https://doi.org/10.3189/002214307784409379 TEMPERATURE-GRADIENT CENTRAL GREENLAND POROUS-MEDIA ICE CORES SNOW AIR TORTUOSITY PERMEABILITY VAPOR article 2007 ftunigroningenpu https://doi.org/10.3189/002214307784409379 2024-05-07T18:31:36Z We studied the diffusion rate of stable isotopes of water ice in a controlled laboratory experiment, where isotopically different layers of fabricated firn were stacked. This experiment was done in order to study the diffusion rate between the isotopically different layers and to compare the measurements with forward-calculated diffusion rates of the fabricated firn stack, using three different analytical and numerical methods. The layers varied in thickness within the stack, and the studied period includes variations in firn temperature. We sampled the firn stack on five different dates along the 144 day long experiment. We obtained a quantitatively good match between the calculated and measured diffusion rates, with a root-mean-square similarity of 67-80% in the depth-averaged diffusion rates. Despite the good average match, we found some qualitative discrepancy between our calculations and our measurements. The calculated diffusion rates predict >5% faster isotopic decay of thinner layers and 13% slower decay of thicker layers than our measurements show. We speculate that grain size and grain fabric may influence the tortuosity of the firn pack, and that the current generalization of tortuosity, being a function of firn density as the only free parameter, is an oversimplification. Article in Journal/Newspaper Greenland Journal of Glaciology University of Groningen research database Greenland Journal of Glaciology 53 183 537 546 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
TEMPERATURE-GRADIENT CENTRAL GREENLAND POROUS-MEDIA ICE CORES SNOW AIR TORTUOSITY PERMEABILITY VAPOR |
spellingShingle |
TEMPERATURE-GRADIENT CENTRAL GREENLAND POROUS-MEDIA ICE CORES SNOW AIR TORTUOSITY PERMEABILITY VAPOR Pohjola, V.A. Meijer, H.A.J. Sjöberg, A. Controlled experiments on the diffusion rate of stable isotopes of water in artificial firn |
topic_facet |
TEMPERATURE-GRADIENT CENTRAL GREENLAND POROUS-MEDIA ICE CORES SNOW AIR TORTUOSITY PERMEABILITY VAPOR |
description |
We studied the diffusion rate of stable isotopes of water ice in a controlled laboratory experiment, where isotopically different layers of fabricated firn were stacked. This experiment was done in order to study the diffusion rate between the isotopically different layers and to compare the measurements with forward-calculated diffusion rates of the fabricated firn stack, using three different analytical and numerical methods. The layers varied in thickness within the stack, and the studied period includes variations in firn temperature. We sampled the firn stack on five different dates along the 144 day long experiment. We obtained a quantitatively good match between the calculated and measured diffusion rates, with a root-mean-square similarity of 67-80% in the depth-averaged diffusion rates. Despite the good average match, we found some qualitative discrepancy between our calculations and our measurements. The calculated diffusion rates predict >5% faster isotopic decay of thinner layers and 13% slower decay of thicker layers than our measurements show. We speculate that grain size and grain fabric may influence the tortuosity of the firn pack, and that the current generalization of tortuosity, being a function of firn density as the only free parameter, is an oversimplification. |
format |
Article in Journal/Newspaper |
author |
Pohjola, V.A. Meijer, H.A.J. Sjöberg, A. |
author_facet |
Pohjola, V.A. Meijer, H.A.J. Sjöberg, A. |
author_sort |
Pohjola, V.A. |
title |
Controlled experiments on the diffusion rate of stable isotopes of water in artificial firn |
title_short |
Controlled experiments on the diffusion rate of stable isotopes of water in artificial firn |
title_full |
Controlled experiments on the diffusion rate of stable isotopes of water in artificial firn |
title_fullStr |
Controlled experiments on the diffusion rate of stable isotopes of water in artificial firn |
title_full_unstemmed |
Controlled experiments on the diffusion rate of stable isotopes of water in artificial firn |
title_sort |
controlled experiments on the diffusion rate of stable isotopes of water in artificial firn |
publishDate |
2007 |
url |
https://hdl.handle.net/11370/672ccd9f-cd38-4098-a887-83711be8a5c5 https://research.rug.nl/en/publications/672ccd9f-cd38-4098-a887-83711be8a5c5 https://doi.org/10.3189/002214307784409379 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Journal of Glaciology |
genre_facet |
Greenland Journal of Glaciology |
op_source |
Pohjola , V A , Meijer , H A J & Sjöberg , A 2007 , ' Controlled experiments on the diffusion rate of stable isotopes of water in artificial firn ' , Journal of Glaciology , vol. 53 , no. 183 , pp. 537-546 . https://doi.org/10.3189/002214307784409379 |
op_relation |
https://research.rug.nl/en/publications/672ccd9f-cd38-4098-a887-83711be8a5c5 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.3189/002214307784409379 |
container_title |
Journal of Glaciology |
container_volume |
53 |
container_issue |
183 |
container_start_page |
537 |
op_container_end_page |
546 |
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1800752651620581376 |