The Progress of RCMs Simulation on East Asia Region

Abstract

In recent years,there are still some difficulties in reproducing the climatological property in East Asian region by means of the General Climate Models(GCMs).Therefore,the researches of adopting the Regional Climate Models(RCMs) have become one significant aspect of simulating the special monsoon climatology in this region and make great progress.In this paper,firstly,the regional climate simulations in East Asia region are simply summarized.Research shows that a majority of RCMs are able to reproduce the climate characteristics of East Asia monsoon region with different extent success,including(1) the average circulation feature;(2) the large-scale features and the evolution processes of the severe and prolonged drought and flood events;(3) the inter-annual,seasonal and intra-seasonal precipitation variation in different monsoon climate region;(4) the seasonal march of major rain belt and the precipitation spatial-temporal characteristics.However,there are still a number of bias and deficiencies.It also emphasizes that(1) the intensity and magnitude of large-scale features are not reproduced flawlessly climatologically;(2) The simulated temperature and precipitation generally show some systematic biases,what's more,parts of the rain-belt are shifted northward about 2~3 latitude.Numerous investigations present that it will improve the simulation results of RCMs by ameliorating and perfecting the physical process parameterization schemes(including the cloud-radiation transfer process,the cumulus-convective precipitation process,the boundary layer physics process and the land surface process and so on) and the models' dynamical configurations(including the selection of research region,the lateral boundary condition and the spatial resolution and otherwise),as well as the appropriate treatment on the large-scale terrain features in the East Asian.In the end,the future prospect of RCMs is discussed.