Pure rotational Raman spectroscopy applied to N2/O2 analysis of air bubbles in polar firn
Earlier gas measurements of firn air (atmosphere in open pore channels) at polar sites have revealed the occurrence of gas fractionation phenomena during bubble close-off, in addition to well-known thermal and gravitational gas separation. Nevertheless, because of difficulties posed by measurement,...
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Cambridge University Press
2021
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ftdoajarticles:oai:doaj.org/article:93db4de55a49455f8cc77bc0ad52ff4a 2023-05-15T13:47:33+02:00 Pure rotational Raman spectroscopy applied to N2/O2 analysis of air bubbles in polar firn Hiroshi Ohno Yoshinori Iizuka Shuji Fujita 2021-10-01T00:00:00Z https://doi.org/10.1017/jog.2021.40 https://doaj.org/article/93db4de55a49455f8cc77bc0ad52ff4a EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S002214302100040X/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2021.40 0022-1430 1727-5652 https://doaj.org/article/93db4de55a49455f8cc77bc0ad52ff4a Journal of Glaciology, Vol 67, Pp 903-908 (2021) Antarctic glaciology ice core polar firn Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2021 ftdoajarticles https://doi.org/10.1017/jog.2021.40 2023-03-12T01:30:57Z Earlier gas measurements of firn air (atmosphere in open pore channels) at polar sites have revealed the occurrence of gas fractionation phenomena during bubble close-off, in addition to well-known thermal and gravitational gas separation. Nevertheless, because of difficulties posed by measurement, little is known about the distribution of air constituents in already closed pores (bubbles) in firn. Herein, we describe the application of high-sensitivity pure rotational Raman spectroscopy, combined with sample immersion in the fluorocarbon-based inert fluid for removing the optical disturbance by diffused reflection. That application efficiently elicits information about nitrogen and oxygen composition ratios (N2/O2 or O2/N2) for each air bubble in firn. The developed methodology presents important implications for elucidating how gas records are formed and modified in the course of pore close-off in polar firn. Article in Journal/Newspaper Antarc* Antarctic ice core Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Antarctic Journal of Glaciology 67 265 903 908 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic glaciology ice core polar firn Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Antarctic glaciology ice core polar firn Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Hiroshi Ohno Yoshinori Iizuka Shuji Fujita Pure rotational Raman spectroscopy applied to N2/O2 analysis of air bubbles in polar firn |
topic_facet |
Antarctic glaciology ice core polar firn Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Earlier gas measurements of firn air (atmosphere in open pore channels) at polar sites have revealed the occurrence of gas fractionation phenomena during bubble close-off, in addition to well-known thermal and gravitational gas separation. Nevertheless, because of difficulties posed by measurement, little is known about the distribution of air constituents in already closed pores (bubbles) in firn. Herein, we describe the application of high-sensitivity pure rotational Raman spectroscopy, combined with sample immersion in the fluorocarbon-based inert fluid for removing the optical disturbance by diffused reflection. That application efficiently elicits information about nitrogen and oxygen composition ratios (N2/O2 or O2/N2) for each air bubble in firn. The developed methodology presents important implications for elucidating how gas records are formed and modified in the course of pore close-off in polar firn. |
format |
Article in Journal/Newspaper |
author |
Hiroshi Ohno Yoshinori Iizuka Shuji Fujita |
author_facet |
Hiroshi Ohno Yoshinori Iizuka Shuji Fujita |
author_sort |
Hiroshi Ohno |
title |
Pure rotational Raman spectroscopy applied to N2/O2 analysis of air bubbles in polar firn |
title_short |
Pure rotational Raman spectroscopy applied to N2/O2 analysis of air bubbles in polar firn |
title_full |
Pure rotational Raman spectroscopy applied to N2/O2 analysis of air bubbles in polar firn |
title_fullStr |
Pure rotational Raman spectroscopy applied to N2/O2 analysis of air bubbles in polar firn |
title_full_unstemmed |
Pure rotational Raman spectroscopy applied to N2/O2 analysis of air bubbles in polar firn |
title_sort |
pure rotational raman spectroscopy applied to n2/o2 analysis of air bubbles in polar firn |
publisher |
Cambridge University Press |
publishDate |
2021 |
url |
https://doi.org/10.1017/jog.2021.40 https://doaj.org/article/93db4de55a49455f8cc77bc0ad52ff4a |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic ice core Journal of Glaciology |
genre_facet |
Antarc* Antarctic ice core Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 67, Pp 903-908 (2021) |
op_relation |
https://www.cambridge.org/core/product/identifier/S002214302100040X/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2021.40 0022-1430 1727-5652 https://doaj.org/article/93db4de55a49455f8cc77bc0ad52ff4a |
op_doi |
https://doi.org/10.1017/jog.2021.40 |
container_title |
Journal of Glaciology |
container_volume |
67 |
container_issue |
265 |
container_start_page |
903 |
op_container_end_page |
908 |
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1766247289885556736 |