Abstract. We describe the development of a non-hydrostatic version regional climate model RegCM4, called RegCM4-NH, for use at convection-permitting resolutions. The dynamical core Mesoscale Model MM5 is introduced in with some modifications to increase stability and applicability long-term simulations. Newly available explicit microphysics schemes are also described, three case studies intense...

This study evaluates for the first time performance of latest version non-hydrostatic RegCM4 (RegCM4-NH) customized over two vast urban agglomerations in China (i.e., Pearl River Delta, PRD, and Yangtze YRD). A one-way double nesting configuration is used, with a mother domain (20 km grid spacing) driven by ERA-Interim data (0.75°) forcing nested domains (4 spacing). The analysis focuses on how...

In this study, we have investigated changes in precipitation extremes and the population’s exposure to these during 2091–2099 China’s Beijing–Tianjin–Hebei (JJJ) region relative historical period of 1991–1999. First, regional climate model RegCM4, with a hydrostatic dynamic core, was run for east Asia, including China, at 12 km resolution 1990–1999 2090–2099. This is forced by global (GCM) MPI-...

Recent studies over different geographical regions of the world have proven that regional climate models at convection-permitting scale (CPMs) improve simulation precipitation in many aspects, such as diurnal cycle, frequency, intensity, and extremes daily—but even more hourly—time scales. Here, we present an evaluation simulations with newly developed RegCM4-NH model run (CP-RegCM4-NH) for a d...

due to climate changes, precipitation forecast average in time scale is one of the most important challenges for specialists in the recent years. the purpose of this research is to investigate the capabilities of the dynamic model regcm4 in precipitation forecast in cold period of fars province. in this study, september to february or 6 month is considered as the cold period. several variable s...