A study of temperature fluctuations in the atmospheric boundary layer

1976 ◽  
Vol 10 (3) ◽  
pp. 337-346 ◽  
Author(s):  
A. Weill ◽  
M. Aubry ◽  
F. Baudin ◽  
J. Heissat
Keyword(s):  
Boundary Layer ◽  
Atmospheric Boundary Layer ◽  
Temperature Fluctuations

Temperature fluctuations in the atmospheric boundary layer

1960 ◽  
Vol 7 (3) ◽  
pp. 375-384 ◽  
Author(s):  
C. H. B. Priestley
Keyword(s):  
Boundary Layer ◽  
Atmospheric Boundary Layer ◽  
Thermal Stratification ◽  
Similarity Theory ◽  
Temperature Fluctuations ◽  
Vertical Temperature Gradient ◽  
Vertical Temperature ◽  
Systematic Analysis ◽  
Wide Range ◽  
Regression Relations

A systematic analysis is made of published measurements of the magnitude of temperature fluctuations in the atmospheric boundary layer. These cover a wide range of height, wind speed, and thermal stratification. Within appropriate ranges of the variables, there is evidence for the existence of a dominantly forced convection régime, and also one wherein the predictions of the similarity theory of free convection are fairly closely approached. Subject to the limitations set by the recording systems used, regression relations are obtained for the magnitude of the fluctuations in terms of height and vertical temperature gradient or heat flux.

scholarly journals Decomposition of wind velocity and temperature fluctuations into wave and turbulent signals, using wavelet transform

2000 ◽  
pp. 141
Author(s):  
Nisia Krusche ◽  
Osvaldo Luis Leal de Moraes ◽  
Birajara S. Machado
Keyword(s):  
Boundary Layer ◽  
Wavelet Transform ◽  
Atmospheric Boundary Layer ◽  
Wind Velocity ◽  
Vertical Velocity ◽  
Turbulent Diffusion ◽  
Temperature Fluctuations ◽  
Wavelet Packets ◽  
Discrete Wavelet ◽  
Velocity Fluctuations

In the stable stratified atmospheric boundary layer, spectra might be affected by several kinds of waves. Since the problem of turbulent diffusion is closely related to the spectra of wind velocity fluctuations, it is necessary to separate the contributions of those waves from that of turbulence. Discrete wavelet packets transform was applied to temperature and vertical velocity fluctuations measured in Candiota, RS (31°28´ S, 53°40´ W), sampled with a frequency of 10 Hz and 1 Hz. In these datasets, waves have been detected through cospectral techniques. Wavelet transform was used to decompose the series. It allowed identification of those contributions that are related to the detected waves, which were then removed from the original signals. Therefore, this method may be used to decompose the series in two signals, one containing waves and other corresponding to random turbulence of the flow.

An Experimental Study of the Statistics of Temperature Fluctuations in the Atmospheric Boundary Layer

2013 ◽  
Vol 150 (1) ◽  
pp. 91-106 ◽  
Author(s):  
Elena Costa Frola ◽  
Andrea Mazzino ◽  
Federico Cassola ◽  
Luca Mortarini ◽  
Enrico Ferrero
Keyword(s):  
Boundary Layer ◽  
Experimental Study ◽  
Atmospheric Boundary Layer ◽  
Temperature Fluctuations
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