% In the case of an entraining PBL (growing in depth), the changes due to vertical advection by PBL entrainment and cumulus-induced subsidence are applied separately.

% Again in the case of an entraining PBL, an extrapolated value is used to calculate the vertical advection of H2O, potential temperature, u and v from the free atmosphere into the PBL (i.e., entrainment). The extrapolated values of H2O mixing ratio and potential temperature are also used in the calculation of the criterion for the occurrence of stratus Layer Cloud Instability (LCI).

% In addition, the mixing of air between the PBL and the layer above associated with an unstable layer cloud has been replaced by an entrainment of air into the PBL. The larger of the entrainment computed due to LCI and that associated with PBL processes is applied.