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(a) The Lagrangian decorrelation time scale TL, for the vertical component of the turbulent air velocity. (b) The east–west U (dashed line) and north–south V (dotted line) components of the mean resolved velocity profile and the overall wind speed (U2+V2)1/2 (solid line) in the simulated stable boundary layer. The variation of U and V with height z leads to an Ekman spiral. (c) The resolved variance in vertical wind speeds.
