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  1. 040 理学部
  2. 0401 学術論文

Environmental Controls of Diffusive and Ebullitive Methane Emissions at a Subdaily Time Scale in the Littoral Zone of a Midlatitude Shallow Lake

http://hdl.handle.net/10091/0002001242
http://hdl.handle.net/10091/0002001242
52f9e7ad-7d27-49b9-9b81-5ccb0ab2a434
名前 / ファイル ライセンス アクション
17H05039-1.pdf 17H05039-1.pdf
Item type 学術雑誌論文 / Journal Article(1)
公開日 2022-11-21
タイトル
言語 en
タイトル Environmental Controls of Diffusive and Ebullitive Methane Emissions at a Subdaily Time Scale in the Littoral Zone of a Midlatitude Shallow Lake
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Taoka, T.

× Taoka, T.

ja Taoka, T.

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Iwata, H.

× Iwata, H.

ja Iwata, H.

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Hirata, R.

× Hirata, R.

ja Hirata, R.

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Takahashi, Y.

× Takahashi, Y.

ja Takahashi, Y.

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Miyabara, Y.

× Miyabara, Y.

ja Miyabara, Y.

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Itoh, M.

× Itoh, M.

ja Itoh, M.

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信州大学研究者総覧へのリンク
氏名 岩田, 拓記
URL https://soar-rd.shinshu-u.ac.jp/profile/ja.WCAaPafh.html
信州大学研究者総覧へのリンク
氏名 宮原, 裕一
URL https://soar-rd.shinshu-u.ac.jp/profile/ja.HNnFOakh.html
出版者
出版者 American Geophysical Union
引用
内容記述タイプ Other
内容記述 Journal of Geophysical Research-Biogeoscience 125(9) : e2020JG005753-(2020)
書誌情報 Journal of Geophysical Research-Biogeoscience

巻 125, 号 9, p. e2020JG005753, 発行日 2020-09-08
抄録
内容記述タイプ Abstract
内容記述 Environmental controls on methane (CH4) emission from lakes are poorly understood at subdaily time scales due to a lack of continuous data, especially for ebullition. We used a novel technique to partition eddy covariance CH4 flux observed in the littoral zone of a midlatitude shallow lake in Japan and examined the environmental controls on diffusion and ebullitive CH4 flux separately at a subdaily time scale in different seasons. Using the high‐frequency data, we investigated how CH4 accumulation in the water and sediment layers alters the dynamics and environmental controls of fluxes. The contribution of ebullitive flux to total flux was 57% on average. Environmental controls of diffusive and ebullitive fluxes known in the literature were confirmed. We further found that the environmental controls were different in different seasons and suggested that additional consideration of CH4 accumulation could explain the variability. The transfer of accumulated dissolved CH4 from the bottom water layer to the surface in summer and the accumulation of dissolved CH4 under surface ice in winter were suggested to be important for explaining the variability of diffusive flux. In summer, a higher ebullitive flux tended to occur following triggers such as a decrease in hydrostatic pressure. In winter, the impact of triggers was not obvious, and a higher ebullitive flux tended to occur in the morning. We suggested that the low CH4 production rate in winter slowed the replenishment of bubbles in the sediment, negating the effect of triggers on ebullition.
資源タイプ(コンテンツの種類)
内容記述タイプ Other
内容記述 Article
ISSN
収録物識別子タイプ PISSN
収録物識別子 2169-8961
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA12077675
DOI
識別子タイプ DOI
関連識別子 https://doi.org/10.1029/2020JG005753
関連名称 10.1029/2020JG005753
権利
権利情報 ©2020. American Geophysical Union. All Rights Reserved.
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
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