Investigating uncertainties in air quality models used in GMAP/SIJAQ 2021 field campaign: General performance of different models and ensemble results

作者：Yesol Cha, Jong-Jae Lee, Chul Han Song, Soontae Kim, Rokjin J. Park, Myong‐In Lee, Jung‐Hun Woo, Jaeho Choi, Kangho Bae, Jinhyeok Yu, Eunhye Kim, Eunhye Kim, Seunghee Lee, Jin‐Seok Kim, Lim‐Seok Chang, Kwonho Jeon, Chang‐Keun Song · 发表于：Atmospheric Environment · 年份：2024 · DOI：10.1016/j.atmosenv.2024.120896 · 被引用次数：4 · 研究领域：Atmospheric chemistry and aerosols、Air Quality Monitoring and Forecasting、Air Quality and Health Impacts

The international field campaign, GMAP/SIJAQ 2021, was conducted in Korea from October 18th to November 25th to enhance the performance and validation of the Geostationary Environment Monitoring Spectrometer (GEMS) products algorithm and obtain a better understanding of the current air pollution status of the Korean Peninsula. Five chemical transport models (CTMs), including CMAQ , CMAQ-GIST, CAMx, WRF-Chem, and WRF GEOS-Chem, were utilized during the campaign to assist in organizing the observation plan and identifying changes in pollutant concentrations and their spatiotemporal distribution in Korea following the Korea–United States Air Quality (KORUS-AQ) 2016. In this study, we evaluated the forecasting performance, strengths, and limitations of these five CTMs and their ensemble in simulating air quality. Intensive measurement data and intercomparisons were employed to explain discrepancies between observed and simulated results. A comparison of the CTM ensemble results for PM 2.5 and various gaseous pollutants between the current GMAP/SIJAQ 2021 and previous KORUS-AQ 2016 campaigns showed the R-value for the total mass PM 2.5 concentration increased from 0.88 to 0.94. This improvement is related to CTM updates, including the emission inventory and better reproductions of the concentrations of gaseous species. However, the models consistently underestimated carbon monoxide (CO) concentrations, similar to the results from KORUS-AQ. This finding still suggests a further cha...