Author(s)

G. Latini, R. Cocci Grifoni & G. Passerini

Abstract

The mixing height is one of the most important parameters in air pollution studies since it determines the vertical extent of the layer in which pollutants are mixed and dispersed. In this study, the temporal evolution of the Mixed Layer, for different meteorological conditions during daytime-nightime transition, has been evaluated by a semi-empirical estimate of boundary layer parameters like the Monin-Obukhov and the roughness length ZQ. Preliminary results mainly based on data from Dodge City (Kansas) and from Florence (Italy) are presented. 1 Introduction The mixing-depth concept is based upon the principle that heat transferred to the atmosphere at the earth surface results in convection, vigorous vertical mixing, and establishes a dry-adiabatic lapse rate. The depth thr

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