Author 楊 冬梅| 岩田 徹| 三浦 健志|
Published Date 2003-12
Publication Title 岡山大学農学部センター報告
Volume volume25
Issue issue1
Content Type Departmental Bulletin Paper
Author 北垣 順大| 牛川 希望| 岩田 徹| 大滝 英治|
Published Date 2003-12
Publication Title 岡山大学農学部センター報告
Volume volume24
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/fest/11463
Title Alternative Heat Budget on Rice Field
FullText URL 009_081_085.pdf
Author Yang, Dongmei| Iwata, Toru| Miura, Takeshi| Ohtaki, Eiji|
Abstract Experience of flux measurements over tall canopies has revealed that the eddy flux of sensible plus latent heat is about 30% smaller than the available radiant energy flux. A systematic observation was carried out to investigate the imbalance problem on rice field. The rice field represents a complex system consisting of rice plant, irrigated water and soil. Date obtained in this experiment show that appreciable understimations of sensible and latent heat fluxes are not recognized but understimations of 15 to 23% are counted in the soil heat flux.
Keywords Heat budget Eddy correlation method Sensible heat flux Latent heat flux Soil heat flux
Publication Title 岡山大学環境理工学部研究報告
Published Date 2004-02-27
Volume volume9
Issue issue1
Start Page 81
End Page 85
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313468
JaLCDOI 10.18926/fest/11459
Title Alternative CO(2) Fluxes Measured by Eddy Correlation and Aerodynamic Techniques
FullText URL 009_069_073.pdf
Author Inohara, Sachiko| Iwata, Toru| Ohtaki, Eiji|
Abstract To elucidate the seasonal and inter-annual variation of CO(2) exchanges between the atmosphere and cultivated field in Japan, the CO(2) flux has been measured by the eddy correlation technique at the experimental farm of Agricultural Faculty, Okayama University since December in 1998. The CO(2) sensor, however, does not work under rainy conditions. The improved aerodynamic technique was developed and used to cover CO(2) flux data which were not collected. This technique gives reasonable CO(2) fluxes even in rainy days. The reliability of the technique was also confirmed by comparing CO(2) fluxes with those measured by the eddy correlation technique using data in fine weather conditions.
Keywords CO(2) flux Eddy correlation technique Aerodynamic techniques Dimensionless profile
Publication Title 岡山大学環境理工学部研究報告
Published Date 2004-02-27
Volume volume9
Issue issue1
Start Page 69
End Page 73
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313999
JaLCDOI 10.18926/fest/11461
Title Alternative The Study of Monin-Obukhov Similarity of Vertical Wind Velocity and Scalar Quantities in the Atmospheric Surface Layer
FullText URL 009_075_079.pdf
Author Ushikawa, Nozomi| Iwata, Toru| Ohtaki, Eiji|
Abstract Standard deviations for vertical wind velocity and scalar quantities, such as carbon dioxide,c, and water vapor,q, were analyzed on the basis of Monin-Obukhov similarity theory in the atmospheric surface layer. The correlation coefficient between scalar quantities c and q ,|R(cq)|, was derived from the similarity functions and can be expressed as the ratio of B(q)/B(c)(B(q)≤B(c)), where parameter B is the value of the normalized standard deviation of carbon dioxide and water vapor at neutral conditions.
Keywords Monin-Obukhov similarity theory Standard deviation Correlation coefficient Carbon dioxide Water vapor
Publication Title 岡山大学環境理工学部研究報告
Published Date 2004-02-27
Volume volume9
Issue issue1
Start Page 75
End Page 79
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313729
Author Iwata, Toru|
Published Date 2004-03-25
Publication Title
Content Type Thesis or Dissertation
Author 牛川 希望| Iwata, Tooru| Miura, Takeshi|
Published Date 2004-07-01
Publication Title 岡山大学農学部センター報告
Volume volume26
Content Type Departmental Bulletin Paper
Author 猪原 幸子| Iwata, Tooru| Miura, Takeshi|
Published Date 2004-07-01
Publication Title 岡山大学農学部センター報告
Volume volume26
Content Type Departmental Bulletin Paper