Tide level during one year in time-domain measured at Dili port (East Timor) is analyzed by the frequency spectrum with the Fast Fourier Transform (FFT), together with the autocorrelation function (AF). The frequency spectrum shows a characteristic feature of the Lorentz-type resonance (Lorentz oscillator) with the special peaks which are attributed to the major tide constituents related to the gravitational motions of the sun and the moon. The Lorentz-type resonance occurs in water fluid systems under the periodic change in gravitational potential, which is similar to the electronic polarization under an electric potential change. The 1/f characteristics found at high frequencies in the power spectrum (the so-called 1/f characteristics in frequency domain) can be originated only from the gravitational effect, while its origin is usually discussed in terms of meteorology such as atmospheric pressure.
Time-dependent changes of the wind speed, as for example in Hera Campus (East Timor), are analysed by the statistical and the autocorrelation function in time domain and by the frequency spectrum (frequency domain) using the Fast Fourier Transform (FFT). The wind speed can be modelled using the Weibull distribution function. The autocorrelation function in time domain shows roughly a non-exponential decay with periodicity. The power spectrum shows two peaks and nearly 1/f a nature at high frequencies, close to the Kolmogorov prediction with α = 5/3. A Cole-Davidson type generalisation of wind dynamics, originating from the fractional dynamics of oscillation, is different from the dynamics of tides.
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