The Two‐Energies Turbulence Scheme Coupled to the Assumed PDF Method

Abstract

In previous papers (Bašták Ďurán et al., 2014(Bašták Ďurán et al., , 2018 the authors derived a turbulence scheme based on two prognostic turbulence energies with the aim to parameterize turbulence and clouds in the atmospheric boundary layer (ABL) in a unified way.The two-energy (2TE) approach originates in the work of S. S. Zilitinkevich et al. (2007) and S. Zilitinkevich et al. (2008, who proposed the usage of two turbulence energies in the stable boundary layer. In Bašták Ďurán et al. (2018), this work is extended to all atmospheric stabilities in the framework of Bašták Ďurán et al. (2014). The influence of moisture on turbulence mixing is also accounted for. The fundamental difference between the two-energy scheme and turbulence schemes with only one prognostic turbulence energy, the