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http://dx.doi.org/10.5572/KOSAE.2017.33.5.435

Effect of Aerosol Feedback on Solar Radiation in the Korean Peninsula Using WRF-CMAQ Two-way Coupled Model  

Yoo, Jung-Woo (Division of Earth Environmental System, Pusan National University)
Park, Soon-Young (Institute of Environment Studies, Pusan National University)
Jeon, WonBae (Institute of Environment Studies, Pusan National University)
Kim, Dong-Hyeok (Seohaean Research Institute, ChungNam Institute)
Lee, HwaWoon (Division of Earth Environmental System, Pusan National University)
Lee, Soon-Hwan (Department of Earth Science Education, Pusan National University)
Kim, Hyun-Goo (Korea Institute of Energy Research)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.33, no.5, 2017 , pp. 435-444 More about this Journal
Abstract
In this study, we investigated the effect of aerosol feedback on $PM_{10}$ simulation using a two-way coupled air quality model (WRF-CMAQ). $PM_{10}$ concentration over Korea in January 2014 was simulated, and the aerosol feedback effect on the simulated solar radiation was intensively examined. Two $PM_{10}$ 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 $-80MJ/m^2$ due to the aerosol feedback effect. The feedback effect was significant in the west part of Korea, showing high $PM_{10}$ 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 $PM_{10}$. Moreover, FB better matched the observed solar radiation and $PM_{10}$ 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.
Keywords
WRF-CMAQ two-way coupled model; aerosol feedback; solar radiation; rRMSE;
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