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Winter CO2 emission and its production rate in cold temperate soils of northern Japan: 222Rn as a proxy for the validation of CO2 diffusivity
https://nipr.repo.nii.ac.jp/records/15997
https://nipr.repo.nii.ac.jp/records/159977e8ad88e-fbd5-42b8-a689-95815caa047f
Item type | 学術雑誌論文 / Journal Article(1) | |||||||||||
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公開日 | 2020-03-22 | |||||||||||
タイトル | ||||||||||||
タイトル | Winter CO2 emission and its production rate in cold temperate soils of northern Japan: 222Rn as a proxy for the validation of CO2 diffusivity | |||||||||||
タイトル | ||||||||||||
言語 | en | |||||||||||
タイトル | Winter CO2 emission and its production rate in cold temperate soils of northern Japan: 222Rn as a proxy for the validation of CO2 diffusivity | |||||||||||
言語 | ||||||||||||
言語 | eng | |||||||||||
キーワード | ||||||||||||
言語 | en | |||||||||||
主題Scheme | Other | |||||||||||
主題 | CO2 Diffusivity and Transfer velocity | |||||||||||
キーワード | ||||||||||||
言語 | en | |||||||||||
主題Scheme | Other | |||||||||||
主題 | Winter CO2 Emission | |||||||||||
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言語 | en | |||||||||||
主題Scheme | Other | |||||||||||
主題 | 222Rn Tracer | |||||||||||
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言語 | en | |||||||||||
主題Scheme | Other | |||||||||||
主題 | Static Chamber | |||||||||||
キーワード | ||||||||||||
言語 | en | |||||||||||
主題Scheme | Other | |||||||||||
主題 | CO2 Production Rate | |||||||||||
資源タイプ | ||||||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
資源タイプ | journal article | |||||||||||
アクセス権 | ||||||||||||
アクセス権 | metadata only access | |||||||||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||||
著者 |
Kim, Yongwon
× Kim, Yongwon
× Tsunogai, Shizuo
× Tanaka, Noriyuki
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抄録 | ||||||||||||
内容記述タイプ | Abstract | |||||||||||
内容記述 | In the context of a changing seasonal snow-covered period and extent in northern high latitude regions, winter CO2 emissions are vulnerable to drastic climate change, prompting rigorous evaluation of regional carbon budgets. The significance of winter CO2 contributions to the atmosphere in these regions has likewise been recognized. In this study, concentrations of CO2 and 222Rn were observed in the snowpack and underlying cold temperate soils of northern Japan during two winter seasons. Winter CO2 emissions, estimated alternately by snow density, 222Rn tracer (under steady and non-steady states), and chamber, were 56 ± 2, 42 ± 6, 44 ± 15, and 34 ± 3 gCO2-C/m2/season, respectively, suggesting that contribution from average winter CO2 emission corresponds to 25% (range: 19–33%) of annual emission. Winter CO2 emission is highly regulated by soil temperature at 5 cm, depending on snow depth. Winter CO2 emission transport is not suppressed through the snowpack to the atmosphere; rather it is stimulated when seasonal snow depth is over the 40-cm threshold in the soils. The higher soil CO2 production of 0.11 ± 0.02 gCO2-C/m3/h estimated by 222Rn transfer velocity reflects vigorous microbial activity in soils underlying winter snowpack. Therefore, 222Rn is an important proxy for the estimation of winter CO2 emission and diffusivity in snowpack, and of CO2 production rate and transfer velocity in the seasonal, snow-covered. | |||||||||||
書誌情報 |
en : Polar Science 巻 22, p. 100480, 発行日 2019-12 |
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ISSN | ||||||||||||
収録物識別子タイプ | ISSN | |||||||||||
収録物識別子 | 18739652 | |||||||||||
DOI | ||||||||||||
識別子タイプ | DOI | |||||||||||
関連識別子 | https://doi.org/10.1016/j.polar.2019.09.002 | |||||||||||
関連名称 | 10.1016/j.polar.2019.09.002 |