An analysis of wind velocity fluctuations in the atmospheric surface layer using an orthonormal wavelet transform |
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Authors: | Taiichi Hayashi |
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Institution: | (1) Shionomisaki Wind Effect Laboratory, Disaster Prevention Research Institute, Kyoto University, Wakayama, Japan |
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Abstract: | A wavelet analysis can supply information of both the location (time) and the scale of fluctuations. This method is applied to the fluctuations of the natural wind and the turbulent transport of momentum in the atmospheric surface layer. The shapes of both the wavelet spectra and the Fourier spectra of the three components of the wind velocity fluctuations are similar to each other. The quadrant representation of momentum transport shows the scale difference of the transport. The large-scale fluctuations mainly contribute to the downward transport of momentum. |
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