Effects of an Ensemble of Convective Elements on the Large-Scale Motions of the Atmosphere

[摘要] It has been recently recognized that the role played by organized cumulus-scale convec-tion is very important in understanding the dynamics of the general circulation of the atmosphere, particularly in the tropics. Because of large differences between the size of cumulus-scale convection and of large-scale motion, it is difficult to deal with both pheno-mena in one system of atmospheric equations.In this paper we discuss (1) the effects of an ensemble of convective elements on the large-scale motion, and (2) the influence of the large-scale motion on the development of organized cumulus clouds. A scheme is proposed to solve simultaneously two systems of equations for the large-scale flow and for the cumulus-scale convection. The effects of cumu-lus convection are included in the equations for the large-scale motions. The large-scale (synoptic) conditions are included in the equations for the cumulus convection which determine not only the structure of cumulus clouds, but also the population of the clouds.

[学科分类] 大气科学