| Project/Area Number |
15K21036
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Forest science
Agricultural environmental engineering/Agricultural information engineering
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| Research Institution | Shinshu University |
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Principal Investigator |
IWATA Hiroki 信州大学, 学術研究院理学系, 助教 (10466659)
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| Research Collaborator |
ONO Keisuke
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 地表面フラックス / 渦相関法 / 地表面熱収支 / ガス交換 / 大気乱流輸送 / 大気低周波運動 / 大気境界層 / 低周波輸送 |
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| Outline of Final Research Achievements |
The eddy covariance is the standard technique for atmosphere-land exchange of heat and gases. However, due to surface energy imbalance, the observed data still have uncertainty. In this study, we focused on the effect of low-frequency transport in the atmospheric boundary layer on the eddy covariance observation. We developed a methodology to partition the observed exchange data into surface exchange and non-surface low-frequency transport, and examined the characteristics of the low-frequency transport. We found that the contribution of low-frequency transport became large when the atmospheric boundary layer rapidly developed in the morning. This suggested that entrainment process at the top of the boundary layer affected the eddy covariance observation conducted on the ground surface.
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