Climate Simulation for the 21st Century with High Resolution AGCM based on CMIP5 data

The high-resolution (40-km mesh) atmospheric general circulation model (GCM) have been used for regional detail climate response to observed CO2, sulfate and other greenhouse gas for the future climate simulation. For this long-term climate simulation, we have adopted a high-resolution global Circulation model (GME) of German Weather Service (Deutscher Wetterdienst) which is based on uniform icosahedral-hexagonal grid. This high-resolution global model has the advantage of avoiding the lateral boundary problems that the regional climate models have. So To simulate the future climate change, we have performed the model based on the two RCP (Representative Concentration Pathway) Scenarios (RCP8.5 and RCP4.5) by IPCC AR5 and this experiment has used the sea surface temperature and sea ice concentration obtained from projected data by 4 models participating in the Coupled Model Intercomparison Project 5 (CMIP5). First, we have perform the present-day climate simulation during 1979-2009 years using AMIP observed sea surface temperature and sea ice concentration and subsequently we have performed the future climate simulation from 2010 to 2030 years due to the RCP 8.5 and RCP 4.5 respectively. From the results in AGCM, we have analyzed the performance of simulating the present-day climate with observations. The model can reflect the detailed trend of seasonal precipitation and 2m air temperature over the South Asia by the better representation of topographical effects. In future climate change during next 20 years, it shows the increase of air 2m temperature over the South and East Asia region. Although it is not able to capture accurately the response of regional climate change, it can provide the regional information for future climate change of the worldwide.