書誌事項
- タイトル別名
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- Applicability of the Planar Fit Technique in Estimating Surface Fluxes over Flat Terrain using Eddy Covariance
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説明
The planar fit technique is a coordinate rotation scheme widely used for tower-based eddy covariance measurements. Applicability of this technique was examined with respect to the geometry of the mean stream surface. Analyses based on a 3-year eddy-covariance dataset obtained over flat terrain of a paddy field revealed that the mean streamline was upward at almost all wind directions possibly because of flow distortion by the instruments. Fitting a single plane to the concave stream surface led to miscalculations in the offset and tilt angle of the mean streamline. Consequently, the half-hourly mean vertical wind velocity and streamwise momentum flux demonstrated inconsistent distributions in planar fit coordinates. In contrast, they were consistent under a modified planar fit technique, the sectorial planar fit, in which the mean stream plane was determined at each wind sector with a center angle of 30°. The planar fit technique is not applicable when the mean stream surface is not approximated by a plane. In such cases, the sectorial planar fit can be a practical alternative to the ordinary planar fit.
収録刊行物
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- 農業気象
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農業気象 64 (3), 121-130, 2008
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
- 1390282679645608192
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- NII論文ID
- 10025613496
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- NII書誌ID
- AA11530034
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- ISSN
- 18810136
- 00218588
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- NDL書誌ID
- 9655117
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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
- IRDB
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可