부산대학교 도서관

In this study, we investigated the effect of aerosol feedback on PM10 simulation using a two-way coupled air quality model (WRF-CMAQ). PM10 concentration over Korea in January 2014 was simulated, and the aerosol feedback effect on the simulated solar radiation was intensively examined. Two PM10 simulations were conducted using the WRF-CMAQ model with (FB) and without (NFB) the aerosol feedback option. We find that the simulated solar radiation in the west part of Korea decreased by up to -80 MJ/m2 due to the aerosol feedback effect. The feedback effect was significant in the west part of Korea, showing high PM10 estimates due to dense emissions and its long-range transport from China. The aerosol feedback effect contributed to the decreased rRMSE (relative Root Mean Square Error) for solar radiation (47.58% to 30.75%). Aerosol feedback effect on the simulated solar radiation was mainly affected by concentration of PM10. Moreover, FB better matched the observed solar radiation and PM10 concentration than NFB, implying that taking into account the aerosol direct effects resulted in the improved modeling performance. These results indicate that aerosol feedback effects can play an important role in the simulation of solar radiation over Korean Peninsula.