Moist wind relationships

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Abstract

The influence of diabatic processes on the large-scale moisture fluxes depends greatly on the degree of balance between forcing and damping terms in the governing equations. The existence of a near balance requires a reduction in the large-scale horizontal geostrophic wind speed. From a scale analysis of the moisture flux equations it is argued that reductions in the large-scale horizontal wind speed, observed within major cumulus cloud systems, help conserve large-scale moisture fluxes. The deviation of the wind from geostrophic conditions is easily estimated. This wind modification induces secondary vertical circulations that contribute to the convergence, creating or supporting long-lived mesoscale flows. In the tropics the wind modification has an antitriptic relationship. -from Author

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APA

Raymond, W. H. (1993). Moist wind relationships. Monthly Weather Review, 121(7), 1992–2003. https://doi.org/10.1175/1520-0493(1993)121<1992:mwr>2.0.co;2

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