Pure rotational Raman spectroscopy applied to N 2 /O 2 analysis of air bubbles in polar firn
Abstract 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 meas...
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crcambridgeupr:10.1017/jog.2021.40 2024-09-30T14:37:50+00:00 Pure rotational Raman spectroscopy applied to N 2 /O 2 analysis of air bubbles in polar firn Ohno, Hiroshi Iizuka, Yoshinori Fujita, Shuji 2021 http://dx.doi.org/10.1017/jog.2021.40 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302100040X en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 67, issue 265, page 903-908 ISSN 0022-1430 1727-5652 journal-article 2021 crcambridgeupr https://doi.org/10.1017/jog.2021.40 2024-09-04T04:04:07Z Abstract 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 (N 2 /O 2 or O 2 /N 2 ) 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 Journal of Glaciology Cambridge University Press Journal of Glaciology 1 6 |
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Open Polar |
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Cambridge University Press |
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language |
English |
description |
Abstract 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 (N 2 /O 2 or O 2 /N 2 ) 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 |
Ohno, Hiroshi Iizuka, Yoshinori Fujita, Shuji |
spellingShingle |
Ohno, Hiroshi Iizuka, Yoshinori Fujita, Shuji Pure rotational Raman spectroscopy applied to N 2 /O 2 analysis of air bubbles in polar firn |
author_facet |
Ohno, Hiroshi Iizuka, Yoshinori Fujita, Shuji |
author_sort |
Ohno, Hiroshi |
title |
Pure rotational Raman spectroscopy applied to N 2 /O 2 analysis of air bubbles in polar firn |
title_short |
Pure rotational Raman spectroscopy applied to N 2 /O 2 analysis of air bubbles in polar firn |
title_full |
Pure rotational Raman spectroscopy applied to N 2 /O 2 analysis of air bubbles in polar firn |
title_fullStr |
Pure rotational Raman spectroscopy applied to N 2 /O 2 analysis of air bubbles in polar firn |
title_full_unstemmed |
Pure rotational Raman spectroscopy applied to N 2 /O 2 analysis of air bubbles in polar firn |
title_sort |
pure rotational raman spectroscopy applied to n 2 /o 2 analysis of air bubbles in polar firn |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/jog.2021.40 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302100040X |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 67, issue 265, page 903-908 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2021.40 |
container_title |
Journal of Glaciology |
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1 |
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6 |
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1811640614351011840 |