Abstract
Abstract At a global scale the troposphere is a closed water vapour reservoir with interlinked cycles of heat and water. The global (macroscale) water vapour dynamics are analysed in three stages: (a) a semi-empirical simulation procedure quantifying the internal relationships among the vapour pressure gradients at the Earth's surface, within the overheated and unsaturated nearsurface layer, and the precipitation formation zone; (b) an analytical description of the effect of changing the Earth's surface temperature on the vapour pressure gradient at cloud base, giving insight into the feedback mechanism between the Earth's surface evaporation and precipitation formation; and (c) a combination of the previous two stages leading to the equilibrium criteria for vertical vapour flux. Needs and opportunities for applications combined with other approaches in climate research are outlined. Fuller details are given elsewhere (Szesztay, 1991).
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