Evaluating the “Rich-Get-Richer” Mechanism in Tropical Precipitation Change under Global Warming

摘要: Abstract Examining tropical regional precipitation anomalies under global warming in 10 coupled climate models, several mechanisms are consistently found. The tendency of rainfall to increase convergence zones with large climatological and decrease subsidence regions—the rich-get-richer mechanism—has previously been examined different approximations by Chou Neelin, Held Soden. effect increased moisture transported the mean circulation (the “direct effect” or “thermodynamic component” respective terminology) is relatively robust, while dynamic feedback poorly understood differs among models. argument outlined states that thermodynamic component should be a good approximation for large-scale averages; this confirmed averages across convection descent regions, respectively. Within zones, however, can substantially anomalies. Regions negative...