Item type |
学術雑誌論文 / Journal Article(1) |
公開日 |
2021-03-18 |
タイトル |
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タイトル |
Estimation of CH4 emissions from the East Siberian Arctic Shelf based on atmospheric observations aboard the R/V Mirai during fall cruises from 2012 to 2017 |
タイトル |
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言語 |
en |
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タイトル |
Estimation of CH4 emissions from the East Siberian Arctic Shelf based on atmospheric observations aboard the R/V Mirai during fall cruises from 2012 to 2017 |
言語 |
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言語 |
eng |
キーワード |
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主題Scheme |
Other |
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主題 |
Atmospheric CH4 |
キーワード |
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主題Scheme |
Other |
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主題 |
East Siberian Arctic Shelf (ESAS) |
キーワード |
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主題Scheme |
Other |
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主題 |
Cavity ring-down spectroscopy (CRDS) |
キーワード |
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主題Scheme |
Other |
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主題 |
Shipboard measurement |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Atmospheric CH4 |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
East Siberian Arctic Shelf (ESAS) |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Cavity ring-down spectroscopy (CRDS) |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Shipboard measurement |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
アクセス権 |
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アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
著者 |
Tohjima, Yasunori
Zeng, Jiye
Shirai, Tomoko
Niwa, Yosuke
Ishidoya, Shigeyuki
Taketani, Fumikazu
Sasano, Daisuke
Kosugi, Naohiro
Kameyama, Sohiko
Takashima, Hisahiro
Nara, Hideki
Morimoto, Shinji
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抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Atmospheric CH4 mole fractions were observed aboard the R/V Mirai sailing in waters off Alaska in the Arctic Ocean in September 2012–2017 to investigate the CH4 emissions from the surrounding region, especially from the East Siberian Arctic Shelf (ESAS). The synoptic-scale increases of CH4 were compared with simulated increases based on a Lagrangian Particle Dispersion Model and monthly CH4 flux maps determined by a global atmospheric inversion system. There were good agreements between the observed and simulated CH4 increases, suggesting the validity of CH4 fluxes from the surrounding areas of the cruise experiments. The CH4 emissions from the ESAS in September were further optimized in order to minimize the root mean square of the differences between the observed and simulated CH4 increases. The average (±1σ) of the resulting emission rates was 0.58 ± 0.47 TgCH4 yr−1, which was much smaller than previously reported estimates. The individual optimized CH4 emissions varied from −0.1 ± 0.3 to 1.3 ± 0.4 TgCH4 yr−1, showing a positive correlation with the sea surface temperature and a negative correlation with the ice concentration of the ESAS area in September. These results suggest a possible enhancement of the CH4 emissions from the ESAS in a warmer future. |
書誌情報 |
en : Polar Science
p. 100571,
発行日 2021-03
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ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
18739652 |
DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1016/j.polar.2020.100571 |
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関連名称 |
10.1016/j.polar.2020.100571 |