Physical controls on the storage of methane in landfast sea ice
We report on methane (CH 4 ) dynamics in landfast sea ice, brine and under-ice seawater at Barrow in 2009. The CH 4 concentrations in under-ice water ranged from 25.9 to 116.4 nmol L -1 sw , indicating a supersaturation of 700 to 3100% relative to the atmosphere. In comparison, the CH 4 concentratio...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2014
|
Subjects: | |
Online Access: | https://www.vliz.be/imisdocs/publications/271782.pdf |
id |
ftvliz:oai:oma.vliz.be:247093 |
---|---|
record_format |
openpolar |
spelling |
ftvliz:oai:oma.vliz.be:247093 2023-05-15T18:16:19+02:00 Physical controls on the storage of methane in landfast sea ice Zhou, J. Tison, J.-L. Carnat, G. Geilfus, X Delille, B. 2014 application/pdf https://www.vliz.be/imisdocs/publications/271782.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000338655600016 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/tc-8-1019-2014 https://www.vliz.be/imisdocs/publications/271782.pdf info:eu-repo/semantics/openAccess %3Ci%3ECryosphere+8%283%29%3C%2Fi%3E%3A+1019-1029.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-8-1019-2014%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-8-1019-2014%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2014 ftvliz https://doi.org/10.5194/tc-8-1019-2014 2022-05-01T10:27:20Z We report on methane (CH 4 ) dynamics in landfast sea ice, brine and under-ice seawater at Barrow in 2009. The CH 4 concentrations in under-ice water ranged from 25.9 to 116.4 nmol L -1 sw , indicating a supersaturation of 700 to 3100% relative to the atmosphere. In comparison, the CH 4 concentrations in sea ice ranged from 3.4 to 17.2 nmol L -1 ice and the deduced CH 4 concentrations in brine from 13.2 to 677.7 nmol L -1 brine . We investigated the processes underlying the difference in CH 4 concentrations between sea ice, brine and under-ice water and suggest that biological controls on the storage of CH 4 in ice were minor in comparison to the physical controls. Two physical processes regulated the storage of CH 4 in our landfast ice samples: bubble formation within the ice and sea ice permeability. Gas bubble formation due to brine concentration and solubility decrease favoured the accumulation of CH 4 in the ice at the beginning of ice growth. CH 4 retention in sea ice was then twice as efficient as that of salt; this also explains the overall higher CH 4 concentrations in brine than in the under-ice water. As sea ice thickened, gas bubble formation became less efficient, CH 4 was then mainly trapped in the dissolved state. The increase of sea ice permeability during ice melt marked the end of CH 4 storage. Article in Journal/Newspaper Sea ice Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) The Cryosphere 8 3 1019 1029 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
We report on methane (CH 4 ) dynamics in landfast sea ice, brine and under-ice seawater at Barrow in 2009. The CH 4 concentrations in under-ice water ranged from 25.9 to 116.4 nmol L -1 sw , indicating a supersaturation of 700 to 3100% relative to the atmosphere. In comparison, the CH 4 concentrations in sea ice ranged from 3.4 to 17.2 nmol L -1 ice and the deduced CH 4 concentrations in brine from 13.2 to 677.7 nmol L -1 brine . We investigated the processes underlying the difference in CH 4 concentrations between sea ice, brine and under-ice water and suggest that biological controls on the storage of CH 4 in ice were minor in comparison to the physical controls. Two physical processes regulated the storage of CH 4 in our landfast ice samples: bubble formation within the ice and sea ice permeability. Gas bubble formation due to brine concentration and solubility decrease favoured the accumulation of CH 4 in the ice at the beginning of ice growth. CH 4 retention in sea ice was then twice as efficient as that of salt; this also explains the overall higher CH 4 concentrations in brine than in the under-ice water. As sea ice thickened, gas bubble formation became less efficient, CH 4 was then mainly trapped in the dissolved state. The increase of sea ice permeability during ice melt marked the end of CH 4 storage. |
format |
Article in Journal/Newspaper |
author |
Zhou, J. Tison, J.-L. Carnat, G. Geilfus, X Delille, B. |
spellingShingle |
Zhou, J. Tison, J.-L. Carnat, G. Geilfus, X Delille, B. Physical controls on the storage of methane in landfast sea ice |
author_facet |
Zhou, J. Tison, J.-L. Carnat, G. Geilfus, X Delille, B. |
author_sort |
Zhou, J. |
title |
Physical controls on the storage of methane in landfast sea ice |
title_short |
Physical controls on the storage of methane in landfast sea ice |
title_full |
Physical controls on the storage of methane in landfast sea ice |
title_fullStr |
Physical controls on the storage of methane in landfast sea ice |
title_full_unstemmed |
Physical controls on the storage of methane in landfast sea ice |
title_sort |
physical controls on the storage of methane in landfast sea ice |
publishDate |
2014 |
url |
https://www.vliz.be/imisdocs/publications/271782.pdf |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
%3Ci%3ECryosphere+8%283%29%3C%2Fi%3E%3A+1019-1029.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-8-1019-2014%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-8-1019-2014%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000338655600016 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/tc-8-1019-2014 https://www.vliz.be/imisdocs/publications/271782.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-8-1019-2014 |
container_title |
The Cryosphere |
container_volume |
8 |
container_issue |
3 |
container_start_page |
1019 |
op_container_end_page |
1029 |
_version_ |
1766189861355651072 |