The effects of domain choice on summer precipitation simulation and sensitivity in a regional climate model

Abstract

The regional climate models (RegCM) were developed for simulations of monthly decadal timescales. A suite of simulations were performed to evaluate the sensitivity of the RegCM model based on the analyses of observations for May-July 1988 and 1993. The sensitivity of predicted seasonal rainfall to `wet' and `dry' initial soil moisture was analyzed. The simulation of seasonal precipitation as well as the sensitivity to initial soil moisture were affected by domain size and location of the lateral boundaries in both the 1988 and 1993 experiments.