Physics – Data Analysis – Statistics and Probability
Scientific paper
2008-11-20
Physics
Data Analysis, Statistics and Probability
25 pages, 14 figures, presented at DAMES 2008 (Potsdam)
Scientific paper
We study the statistics of the horizontal component of atmospheric boundary layer wind speed. Motivated by its non-stationarity, we investigate which parameters remain constant or can be regarded as being piece-wise constant and explain how to estimate them. We will verify the picture of natural atmospheric boundary layer turbulence to be composed of successively occurring close to ideal turbulence with different parameters. The first focus is put on the fluctuation of wind speed around its mean behaviour. We describe a method estimating the proportionality factor between the standard deviation of the fluctuation and the mean wind speed and analyse its time dependence. The second focus is put on the wind speed increments. We investigate the increment distribution and use an algorithm based on superstatistics to quantify the time dependence of the parameters describing the distribution. Applying the introduced tools yields a comprehensive description of the wind speed in the atmospheric boundary layer.
Ghasemi Fatemeh
Kantz Holger
Laubrich T.
Peinke Joachim
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