Some considerations on skewness and kurtosis of vertical velocity in the\n convective boundary layer

2013/10/16 by A. Maurizi, Maurizi, Alberto, Francesco Tampieri +1
Earth and Planetary Sciences · Environmental Science · #Atmospheric and Oceanic Physics (physics.ao-ph) #Climate variability and models #FOS: Physical sciences #Meteorological Phenomena and Simulations #Plant Water Relations and Carbon Dynamics #Wind and Air Flow Studies

paper · pdf · doi:10.48550/arxiv.1310.4321

openalex publication_date 2013/10/16 · openalex created_date 2022/10/01 · openalex updated_date 2026/07/28

Abstract

Data of skewness S and kurtosis K of vertical velocity in the convective\nboundary layer from different datasets have been analysed. Vertical profiles of\nS were found to be grouped into two classes that display different slopes\nwith height: one is nearly constant and the other is increasing. This behaviour\ncan be explained using a simple model for the PDF of vertical velocity and\nassuming two distinct vertical profiles of updraft area fraction from\nliterature. The possibility of describing the explicit dependence of K on S\nwas revised critically, also considering the neutral limit as well as the limit\nfor very small non-dimensional height. It was found that the coefficients of\nthe relationship depends on both the Obukhov length scale L and inversion\nheight z_i.\n

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