An evaluation of local similarity at the top of the mixed layer based on large-eddy simulations

Local similarity, referred to as type II similarity, in the interfacial, st ably-stratified layer at the top of the atmospheric (or oceanic) mixed laye r is discussed. Type II scales for scalars are based on the local values of scalar gradients. Similarity predictions are derived from the second-order closure model of Yamada and Mellor, and also from similarity arguments. Th e obtained formulation is verified for active and passive scalars based on the large-eddy simulation model.