Authors: Elena Meneguz; David J. Thomson
Addresses: Atmospheric Dispersion and Air Quality, Met Office, FitzRoy Road, Exeter, EX1 3PB, UK ' Atmospheric Dispersion and Air Quality, Met Office, FitzRoy Road, Exeter, EX1 3PB, UK
Abstract: This paper describes an updated scheme for parametrisation of atmospheric convection to be used in the Met Office Atmospheric Dispersion Model (NAME III). In this scheme, the vertical transport of particles due to convection is represented in a 1-dimensional model based on a 'mass-flux' approach. Empirical formulas are used to obtain the mass fluxes and the convective precipitation is used for closure. Results compared with the mass fluxes from the single column version of the Met Office's NWP model show good agreement. Lastly, an alternative method to estimate the mass fluxes by calculating a dilute parcel ascent is also discussed.
Keywords: parametrisation; atmospheric convection; atmospheric dispersion modelling; particle transport; mass fluxes; convective precipitation; dilute parcel ascent.
International Journal of Environment and Pollution, 2014 Vol.54 No.2/3/4, pp.128 - 136
Received: 08 May 2021
Accepted: 12 May 2021
Published online: 13 Oct 2014 *