Long-term variations of the mole fraction and carbon isotope ratio of atmospheric methane observed at Ny-Ålesund, Svalbard from 1996 to 2013
We have conducted systematic observations of the CH4 mole fraction and its carbon isotope ratio (δ13C) at Ny-Ålesund, Svalbard (78°55′N, 11°56′E) using air samples collected weekly since 1991 and 1996, respectively. The CH4 mole fraction showed long-term increase until 1999, stagnation between 2000...
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Stockholm University Press
2017
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ftdoajarticles:oai:doaj.org/article:0e48eb32a8ef4c4d841a7e1c9bdcf6f6 2023-05-15T14:57:08+02:00 Long-term variations of the mole fraction and carbon isotope ratio of atmospheric methane observed at Ny-Ålesund, Svalbard from 1996 to 2013 Shinji Morimoto Ryo Fujita Shuji Aoki Daisuke Goto Takakiyo Nakazawa 2017-01-01T00:00:00Z https://doi.org/10.1080/16000889.2017.1380497 https://doaj.org/article/0e48eb32a8ef4c4d841a7e1c9bdcf6f6 EN eng Stockholm University Press http://dx.doi.org/10.1080/16000889.2017.1380497 https://doaj.org/toc/1600-0889 1600-0889 doi:10.1080/16000889.2017.1380497 https://doaj.org/article/0e48eb32a8ef4c4d841a7e1c9bdcf6f6 Tellus: Series B, Chemical and Physical Meteorology, Vol 69, Iss 1 (2017) atmospheric methane stable carbon isotope greenhouse gas Arctic Meteorology. Climatology QC851-999 article 2017 ftdoajarticles https://doi.org/10.1080/16000889.2017.1380497 2022-12-31T02:14:19Z We have conducted systematic observations of the CH4 mole fraction and its carbon isotope ratio (δ13C) at Ny-Ålesund, Svalbard (78°55′N, 11°56′E) using air samples collected weekly since 1991 and 1996, respectively. The CH4 mole fraction showed long-term increase until 1999, stagnation between 2000 and 2006, followed by an increase after 2006. On the other hand, δ13C showed monotonous increase until 2006 and decrease after 2006. By comparing the rates of change in the CH4 mole fraction and δ13C under the assumption that the atmospheric CH4 lifetime is constant, it is suggested that the temporal pause of the CH4 mole fraction observed at Ny-Ålesund is attributed to reductions of CH4 release from the microbial and fossil fuel sectors. On the other hand, the increase in CH4 after 2006 could be ascribed to an increase in microbial CH4 release. The CH4 and δ13C data presented in this paper would be useful for clarifying their temporal variations in the Arctic atmosphere, as well as providing additional constraints on the global CH4 budget. Article in Journal/Newspaper Arctic Ny Ålesund Ny-Ålesund Svalbard Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Ny-Ålesund Tellus B: Chemical and Physical Meteorology 69 1 1380497 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
atmospheric methane stable carbon isotope greenhouse gas Arctic Meteorology. Climatology QC851-999 |
spellingShingle |
atmospheric methane stable carbon isotope greenhouse gas Arctic Meteorology. Climatology QC851-999 Shinji Morimoto Ryo Fujita Shuji Aoki Daisuke Goto Takakiyo Nakazawa Long-term variations of the mole fraction and carbon isotope ratio of atmospheric methane observed at Ny-Ålesund, Svalbard from 1996 to 2013 |
topic_facet |
atmospheric methane stable carbon isotope greenhouse gas Arctic Meteorology. Climatology QC851-999 |
description |
We have conducted systematic observations of the CH4 mole fraction and its carbon isotope ratio (δ13C) at Ny-Ålesund, Svalbard (78°55′N, 11°56′E) using air samples collected weekly since 1991 and 1996, respectively. The CH4 mole fraction showed long-term increase until 1999, stagnation between 2000 and 2006, followed by an increase after 2006. On the other hand, δ13C showed monotonous increase until 2006 and decrease after 2006. By comparing the rates of change in the CH4 mole fraction and δ13C under the assumption that the atmospheric CH4 lifetime is constant, it is suggested that the temporal pause of the CH4 mole fraction observed at Ny-Ålesund is attributed to reductions of CH4 release from the microbial and fossil fuel sectors. On the other hand, the increase in CH4 after 2006 could be ascribed to an increase in microbial CH4 release. The CH4 and δ13C data presented in this paper would be useful for clarifying their temporal variations in the Arctic atmosphere, as well as providing additional constraints on the global CH4 budget. |
format |
Article in Journal/Newspaper |
author |
Shinji Morimoto Ryo Fujita Shuji Aoki Daisuke Goto Takakiyo Nakazawa |
author_facet |
Shinji Morimoto Ryo Fujita Shuji Aoki Daisuke Goto Takakiyo Nakazawa |
author_sort |
Shinji Morimoto |
title |
Long-term variations of the mole fraction and carbon isotope ratio of atmospheric methane observed at Ny-Ålesund, Svalbard from 1996 to 2013 |
title_short |
Long-term variations of the mole fraction and carbon isotope ratio of atmospheric methane observed at Ny-Ålesund, Svalbard from 1996 to 2013 |
title_full |
Long-term variations of the mole fraction and carbon isotope ratio of atmospheric methane observed at Ny-Ålesund, Svalbard from 1996 to 2013 |
title_fullStr |
Long-term variations of the mole fraction and carbon isotope ratio of atmospheric methane observed at Ny-Ålesund, Svalbard from 1996 to 2013 |
title_full_unstemmed |
Long-term variations of the mole fraction and carbon isotope ratio of atmospheric methane observed at Ny-Ålesund, Svalbard from 1996 to 2013 |
title_sort |
long-term variations of the mole fraction and carbon isotope ratio of atmospheric methane observed at ny-ålesund, svalbard from 1996 to 2013 |
publisher |
Stockholm University Press |
publishDate |
2017 |
url |
https://doi.org/10.1080/16000889.2017.1380497 https://doaj.org/article/0e48eb32a8ef4c4d841a7e1c9bdcf6f6 |
geographic |
Arctic Svalbard Ny-Ålesund |
geographic_facet |
Arctic Svalbard Ny-Ålesund |
genre |
Arctic Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
Arctic Ny Ålesund Ny-Ålesund Svalbard |
op_source |
Tellus: Series B, Chemical and Physical Meteorology, Vol 69, Iss 1 (2017) |
op_relation |
http://dx.doi.org/10.1080/16000889.2017.1380497 https://doaj.org/toc/1600-0889 1600-0889 doi:10.1080/16000889.2017.1380497 https://doaj.org/article/0e48eb32a8ef4c4d841a7e1c9bdcf6f6 |
op_doi |
https://doi.org/10.1080/16000889.2017.1380497 |
container_title |
Tellus B: Chemical and Physical Meteorology |
container_volume |
69 |
container_issue |
1 |
container_start_page |
1380497 |
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1766329219551330304 |