Numerical experiments investigating the orographic effects on a heavy rainfall event over the northwestern coast of Taiwan

摘要

An unusual heavy coastal rainfall event([231 mm day-1) occurred during the period of 24-25 June 1987 over the lowland (elevation less than 200 m) andcoastal areas in northwest and central Taiwan.TheWeather Research and Forecasting (WRF) model is used toinvestigate the role of synoptic forcing,orographic effectsand the diurnal heating cycle on the generation of a prefrontallocalized low-level convergence zone offshoreleading to the observed coastal rainfall maximum.