Wavelet multiresolution analysis of numerically simulated 3D radiative convection

Aime Fournier; David E. Stevens

doi:10.1117/12.236036

22 March 1996 Wavelet multiresolution analysis of numerically simulated 3D radiative convection

Aime Fournier, David E. Stevens

Proceedings Volume 2762, Wavelet Applications III; (1996) https://doi.org/10.1117/12.236036
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

A wavelet multiresolution analysis is performed on atmospheric fields simulated by a multilevel 3-dimensional atmospheric boundary layer model. Wavelet cospectra of the vertical wind and potential temperature are calculated and compared with radial Fourier cospectra. The former indicate most of the field variance to have horizontal scales roughly equal to the vertical scale, as should be the case for convectively driven turbulence. Fourier spectra exhibit a minus 3 power law, suggesting that the statistics may depend only on a quantity with units of time. Observations of time- and scale-dependent structures suggest certain physical mechanisms at work. The multiresolution analysis analogue of turbulent energy equations is formulated. This framework supports the proposed physical mechanisms.

Citation Download Citation

Aime Fournier and David E. Stevens "Wavelet multiresolution analysis of numerically simulated 3D radiative convection", Proc. SPIE 2762, Wavelet Applications III, (22 March 1996); https://doi.org/10.1117/12.236036

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