Post-depositional loss of nitrate and chloride in Antarctic snow by photolysis and sublimation: a field investigation
Nitrate in snow is subject to post-depositional processing, which leads to a net loss and redistribution within the snowpack. The relative importance of post-depositional loss processes such as the volatilization of nitric acid (HNO3) and photolysis of nitrate has long been debated. Changes in nitra...
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Norwegian Polar Institute
2020
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Online Access: | https://doi.org/10.33265/polar.v39.5146 https://doaj.org/article/3c861b2bc3f347f2a30cc1a6c2228532 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:3c861b2bc3f347f2a30cc1a6c2228532 2023-05-15T13:47:18+02:00 Post-depositional loss of nitrate and chloride in Antarctic snow by photolysis and sublimation: a field investigation Kazushi Noro Norimichi Takenaka 2020-12-01 https://doi.org/10.33265/polar.v39.5146 https://doaj.org/article/3c861b2bc3f347f2a30cc1a6c2228532 en eng Norwegian Polar Institute 1751-8369 doi:10.33265/polar.v39.5146 https://doaj.org/article/3c861b2bc3f347f2a30cc1a6c2228532 undefined Polar Research, Vol 39, Iss 0, Pp 1-9 (2020) antarctica geochemical cycle nitrogen cycle nitrogen oxides ozone geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.33265/polar.v39.5146 2023-01-22T19:28:53Z Nitrate in snow is subject to post-depositional processing, which leads to a net loss and redistribution within the snowpack. The relative importance of post-depositional loss processes such as the volatilization of nitric acid (HNO3) and photolysis of nitrate has long been debated. Changes in nitrate and chloride concentrations in the snowpack were investigated at H128 (69°23.584’S, 41°33.712’E), an Antarctic coastal site approximately 100 km from Syowa Station in East Antarctica from December 2015 to February 2016. Results indicate that chloride migrated to deeper sites within the snowpack under the influence of water vapour movement. Moreover, 50% of the nitrate on surface snow was lost to photolysis, and approximately 20% of the nitrate was absent at a depth of 40 cm. To enhance our knowledge of the Antarctic geochemical cycle, this study is the first to suggest chloride ion movement in snowpacks or significant nitrate loss for any Antarctic coastal site. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Polar Research Unknown Antarctic East Antarctica Syowa Station The Antarctic Polar Research 39 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
antarctica geochemical cycle nitrogen cycle nitrogen oxides ozone geo |
spellingShingle |
antarctica geochemical cycle nitrogen cycle nitrogen oxides ozone geo Kazushi Noro Norimichi Takenaka Post-depositional loss of nitrate and chloride in Antarctic snow by photolysis and sublimation: a field investigation |
topic_facet |
antarctica geochemical cycle nitrogen cycle nitrogen oxides ozone geo |
description |
Nitrate in snow is subject to post-depositional processing, which leads to a net loss and redistribution within the snowpack. The relative importance of post-depositional loss processes such as the volatilization of nitric acid (HNO3) and photolysis of nitrate has long been debated. Changes in nitrate and chloride concentrations in the snowpack were investigated at H128 (69°23.584’S, 41°33.712’E), an Antarctic coastal site approximately 100 km from Syowa Station in East Antarctica from December 2015 to February 2016. Results indicate that chloride migrated to deeper sites within the snowpack under the influence of water vapour movement. Moreover, 50% of the nitrate on surface snow was lost to photolysis, and approximately 20% of the nitrate was absent at a depth of 40 cm. To enhance our knowledge of the Antarctic geochemical cycle, this study is the first to suggest chloride ion movement in snowpacks or significant nitrate loss for any Antarctic coastal site. |
format |
Article in Journal/Newspaper |
author |
Kazushi Noro Norimichi Takenaka |
author_facet |
Kazushi Noro Norimichi Takenaka |
author_sort |
Kazushi Noro |
title |
Post-depositional loss of nitrate and chloride in Antarctic snow by photolysis and sublimation: a field investigation |
title_short |
Post-depositional loss of nitrate and chloride in Antarctic snow by photolysis and sublimation: a field investigation |
title_full |
Post-depositional loss of nitrate and chloride in Antarctic snow by photolysis and sublimation: a field investigation |
title_fullStr |
Post-depositional loss of nitrate and chloride in Antarctic snow by photolysis and sublimation: a field investigation |
title_full_unstemmed |
Post-depositional loss of nitrate and chloride in Antarctic snow by photolysis and sublimation: a field investigation |
title_sort |
post-depositional loss of nitrate and chloride in antarctic snow by photolysis and sublimation: a field investigation |
publisher |
Norwegian Polar Institute |
publishDate |
2020 |
url |
https://doi.org/10.33265/polar.v39.5146 https://doaj.org/article/3c861b2bc3f347f2a30cc1a6c2228532 |
geographic |
Antarctic East Antarctica Syowa Station The Antarctic |
geographic_facet |
Antarctic East Antarctica Syowa Station The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Polar Research |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Polar Research |
op_source |
Polar Research, Vol 39, Iss 0, Pp 1-9 (2020) |
op_relation |
1751-8369 doi:10.33265/polar.v39.5146 https://doaj.org/article/3c861b2bc3f347f2a30cc1a6c2228532 |
op_rights |
undefined |
op_doi |
https://doi.org/10.33265/polar.v39.5146 |
container_title |
Polar Research |
container_volume |
39 |
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1766246859449303040 |