A NEW DIFFERENTIAL EQUATION OF MIXING LENGTH CONSIDERING ATMOSPHERIC STABILITY AND ITS APPLICABILITY TO ATMOSPHERIC BOUNDARY LAYER
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- QIAN Chaochao
- 中央大学理工学部 都市環境学科
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- YAMADA Tadashi
- 中央大学理工学部 都市環境学科
Bibliographic Information
- Other Title
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- 安定度を考慮した混合距離に関する微分方程式の提案と大気境界層への適用可能性
- アンテイド オ コウリョ シタ コンゴウ キョリ ニ カンスル ビブン ホウテイシキ ノ テイアン ト タイキ キョウカイソウ エ ノ テキヨウ カノウセイ
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Abstract
Numerical calculations of climate change and weather forecast has been widely carried out, and Monin-Obukhov length based vertical distribution of wind velocity (Log+Linear law) is used in the calculations typically. However, it is not suitable for the numerical calculations because the stability scale of Monin-Obukhov is an algebraic expression. Also, it is very difficult to give a physical interpretation that the scale of the mixing length is negative when the atmosphere is instable. In addition, the scale on the vertical direction of the mixed layer should be set a priori when the atmosphere is instable. In order to solve these problems, a new differential equation of physically rigorous mixing length with considering atmospheric stability has been proposed in this study. The precision of wind velocity distribution in the vertical direction was confirmed by both observed data and Monin-Obukhov length bese Log+Linear law in the study. The proposed stability length can be used more conveniently than existing Monin-Obukhov length based mixing length to deal with the boundary layer in atmospheric calculations such as GCM or weather models.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 71 (5), I_283-I_288, 2015
Japan Society of Civil Engineers
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Details
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- CRID
- 1390001205357344512
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- NII Article ID
- 40020629938
- 130005128911
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- ISSN
- 21856648
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- NDL BIB ID
- 026824227
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed