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Exploring the properties of local and non-local vertical diffusion schemes in the EMEP model using 222Rn data

The simulations of hourly 222Rn concentrations are performed with the EMEP model to validate different parameterization schemes for vertical mixing. In addition to recently evaluated non-local vertical diffusion schemes, a new scheme which is a local and based on total turbulent energy (TTE) has been implemented in the model and evaluated. Due to its properties 222Rn is commonly used to study the model sub-grid mixing schemes, numerical advection schemes or to compare the performance of different models. The effects on simulated 222Rn concentrations are investigated providing useful information on dynamic properties and on turbulence parameterization techniques.

higher order closure turbulence scheme; air quality modelling; Radon 222 measurements

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