hanna Subroutine

public subroutine hanna(z)

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Computation of \sigma_i and \tau_L based on the scheme of Hanna (1982) * Source: 'Atmospheric Turbulence and Air Polution', chapter 4 and 7, * J.A. Businger, edited by F.T.M. Nieuwstadt and H. van Dop * * * Author: A. Stohl * * 4 December 1997 * *

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Variables: * dsigwdz [1/s] vertical gradient of sigw * ol [m] Obukhov length * sigu, sigv, sigw standard deviations of turbulent velocity fluctuations * tlu [s] Lagrangian time scale for the along wind component. * tlv [s] Lagrangian time scale for the cross wind component. * tlw [s] Lagrangian time scale for the vertical wind component. * ust, ustar [m/s] friction velocity * wst, wstar [m/s] convective velocity scale * *

1. Unstable conditions

1. Stable conditions

Arguments