Interannual variation in net ecosystem CO₂ exchange and its climatic controls in a semiarid grassland of Mongolia
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- NAKANO Tomoko
- Faculty of Economics, Chuo University
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- SHINODA Masato
- Graduate School of Environmental Studies, Nagoya University
書誌事項
- タイトル別名
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- Interannual variation in net ecosystem CO<SUB>2</SUB> exchange and its climatic controls in a semiarid grassland of Mongolia
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抄録
Year-round eddy covariance flux measurements were made in a semiarid grassland in Mongolia during 2009-2014 to examine the interannual variability in net ecosystem CO2 exchange (NEE) and its climatic controls. Annual cumulative NEE ranged from −20.9 to 8.1 g C m−2 yr−1, indicating that the semiarid grassland ecosystem can be a carbon source or a carbon sink, depending on climatic conditions. A correlation analysis showed that interannual variability in NEE was significantly related to precipitation and soil water content at 10 cm depth (SWC10) in June and to the vapor pressure deficit (VPD) in July. In addition, the variation in gross primary production (GPP) in July contributed most to the interannual variation in NEE; and GPP in July was significantly related to June precipitation, June SWC10, and July VPD. From these results, we concluded that precipitation during the early growing season and air dryness during the middle growing season were essential climatic factors regulating the interannual variation in NEE in this semiarid grassland.
収録刊行物
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- 農業気象
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農業気象 74 (2), 92-96, 2018
日本農業気象学会
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詳細情報 詳細情報について
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- CRID
- 1390282679645902720
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- NII論文ID
- 130006684512
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- NII書誌ID
- AN00200732
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- ISSN
- 18810136
- 00218588
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- NDL書誌ID
- 028937515
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可