Abstract
Regional climate models are important research tools available to scientists around the world, including in economically developing nations (EDNs). The Earth Systems Physics (ESP) group of the Abdus Salam International Centre for Theoretical Physics (ICTP) maintains and distributes a state-of-the-science regional climate model called the ICTP Regional Climate Model version 3 (RegCM3), which is currently being used by a large research community for a diverse range of climate-related studies. The RegCM3 is the central, but not only, tool of the ICTP-maintained Regional Climate Research Network (RegCNET) aimed at creating south–south and north–south scientific interactions on the topic of climate and associated impacts research and modeling. In this paper, RegCNET, RegCM3, and illustrative results from RegCM3 benchmark simulations applied over south Asia, Africa, and South America are presented. It is shown that RegCM3 performs reasonably well over these regions and is therefore useful for climate studies in EDNs.
Highlights
We focus the discussion of Regional Climate Model version 3 (RegCM3) on new developments in the model that have led to improved simulations over tropical and subtropical domains, thereby making the model a more useful tool for RegCNET scientists
These biases are of a similar magnitude to low scheme performs reasonably well in simulating the level temperature biases observed in other regional climate model (RCM) simulations over West (b) RegCM3 Precipitation & Winds
Another goal is to expand RegCNET research paper, we present the recently inaugurated I nternational Centre for Theoretical Physics (ICTP) activities, in particular toward the application of Regional Climate Network, or RegCNET, and the climate model output to impact studies ofparticular newly released ICTP RegCM3
Summary
In addition to a more physical representation of convection, the MIT scheme offers several advantages compared to the other RegCM3 convection options It includes a formulation of the autocon version ofcloudwater into precipitation inside cumulus clouds, and ice processes are accounted for by allowing the autoconversion threshold water content to be tem perature dependent. The scheme describes advection by atmospheric winds, diffusion by turbulence, vertical transport by deep cumulus convection, dry and wet removal processes, and gas and aqueous phase chemi cal conversion mechanisms Wet removal both by resolvable- and subgrid-scale precipitation is param eterized as a function of the rate of conversion from cloud water to rain water and the hydrophilicity of the different aerosols. This diverse range of applications and regions shows the versatility and portability of the RegCM system
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