Heat energy balance in the convective atmospheric boundary layer at Xianghe (Beijing area), China

A simple and physically consistent expression for the turbulent heat flux e quation in the convective atmospheric boundary layer (CABL) has been sugges ted by Holtslag and Moeng in 1991. In their equation, valid under quasi-ste ady states and horizontal homogeneity, the countergradient term resulted fr om the third-moment transport effect rather than from the buoyancy producti on term. In this paper, experimental observation data from the World Labora tory Applied Research Project on Drought and Desertification (WL-ARPDD94 Ex periment), carried out in a flat region of the greater Beijing area, China, have been utilized with the purpose of checking the validity of the Holtsl ag and Moeng equation. The result of this experimental check proved to be m ore than satisfactory through most of the CABL.