Local Similarity Relationships of Non-Dimensional Wind and Temperature Gradient in the Tower-Layer Atmosphere over Beijing City

Al-Jiboori M. H.; Xu Yumao; Qian Yongfu

doi:10.1007/s00376-000-0025-6

Impact Factor: 5.8

Volume 17 Issue 4

Oct. 2000

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 2000 > 17(4): 636-648

Local Similarity Relationships of Non-Dimensional Wind and Temperature Gradient in the Tower-Layer Atmosphere over Beijing City

1.
Department of Atmospheric Sciences; Nanjing University; Nanjing 210093,Department of Atmospheric Sciences; Nanjing University; Nanjing 210093,Department of Atmospheric Sciences; Nanjing University; Nanjing 210093

doi: 10.1007/s00376-000-0025-6

Abstract
References
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Abstract:
Micrometeorological data for wind and temperature from a 325 m high tower in Beijing City are analyzed by use of local similarity theory. Non-dimensional wind and temperature gradients, Фm and Фh, are determined by three techniques called, respectively, eddy-correlation, mean profiles and inertia-subrange cospectra (ISC) method for a wide range of atmospheric stratification from unstable to stable conditions. Average dissipation rate Фε of turbulent kinetic energy (TKE) is evaluated from u-spectrum, as a quantity required in the last technique. Ratio of the eddy transfer coefficients. α (= Kh / Km,), is calculated from Фm and Фh estimations. The results from various techniques are compared with each other and with some available empirical results in the tower-layer. It is shown that the empirical relationships determined by mean profiles and ISC methods in the tower-layer turbulence are in agreement with each other and with some other results.
- Local similarity,
- Non-dimensional gradients of wind and temperature,
- Dissipation rate,
- Ratio of eddy diffusivities,
- Spectra and Cospectra
References

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Manuscript History

Manuscript received: 10 October 2000

Manuscript revised: 10 October 2000

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Local Similarity Relationships of Non-Dimensional Wind and Temperature Gradient in the Tower-Layer Atmosphere over Beijing City

1. Department of Atmospheric Sciences; Nanjing University; Nanjing 210093,Department of Atmospheric Sciences; Nanjing University; Nanjing 210093,Department of Atmospheric Sciences; Nanjing University; Nanjing 210093

Manuscript received: 2000-10-10
Manuscript revised: 2000-10-10

Abstract: Micrometeorological data for wind and temperature from a 325 m high tower in Beijing City are analyzed by use of local similarity theory. Non-dimensional wind and temperature gradients, Фm and Фh, are determined by three techniques called, respectively, eddy-correlation, mean profiles and inertia-subrange cospectra (ISC) method for a wide range of atmospheric stratification from unstable to stable conditions. Average dissipation rate Фε of turbulent kinetic energy (TKE) is evaluated from u-spectrum, as a quantity required in the last technique. Ratio of the eddy transfer coefficients. α (= Kh / Km,), is calculated from Фm and Фh estimations. The results from various techniques are compared with each other and with some available empirical results in the tower-layer. It is shown that the empirical relationships determined by mean profiles and ISC methods in the tower-layer turbulence are in agreement with each other and with some other results.

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