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A low-order general circulation moisture model is presented, and some experiments with it are described. The model is based on the quasi-geostrophic motion in the β-plane of two layers with landsea distribution. As proposed by Lorenz, the moisture variable in the model is the total dewpoint. Modeled processes consist of evaporation, precipitation, and the effects of clouds and water vapor on radiation.Results of the experiments with the model show that the moisture process enhances subtropical highs significantly and the meridional development of flow. It can also reproduce the hi-equilibrium states in certain parametric combinations, which is similar to the observational fact about the “Eastern pattern” and the “Western pattern” circulations in the subtropical areas during the summer half year.
A low-order general moisture model is presented, and some experiments with it are described. The model is based on the quasi-geostrophic motion in the β-plane of two layers with landsea distribution. As proposed by Lorenz, the moisture variable in the model is the total dewpoint. Modeled processes consist of evaporation, precipitation, and the effects of clouds and water vapor on radiation. Results of the experiments with the model show that the moisture process enhances subtropical highs significantly and the meridional development of flow. It. can also reproduce the hi-equilibrium states in certain parametric combinations, which is similar to the observational fact about the “Eastern pattern ” and the “Western pattern ” circulations in the subtropical areas during the summer half year.