대기화학-에어로졸-구름-복사 과정이 상호작용하는 전지구시스템모델 (UKESM) 내 서로 다른 대기화학 과정 적용에 따른 동아시아 지역 대기질과 기후 모의 성능 평가

• Published in: 한국대기환경학회지, 41(4) pp. 622 - 644
• Main Authors: 윤대옥, 송형규
• Format: Journal Article
• Language: Korean
• Published: 한국대기환경학회 01.08.2025
• Subjects: 대기과학
• ISSN: 1598-7132; 2383-5346

Earth System Models (ESMs) are advanced modeling frameworks designed for both sub-seasonal weather prediction and long-term climate analysis. Unlike traditional global models, ESMs incorporate fully interactive atmospheric chemistry, aerosols, clouds, and radiation processes. The coupling of atmospheric chemistry and aerosol physics in the atmosphere enables ESMs to simulate weather and climate realistically by accounting for feedbacks between meteorology and atmospheric chemistryaerosol- cloud-radiation interactions, which leads to support quantitative assessment of how air pollutants influence regional climate and air quality. In this study, we utilized the UK Earth System Model (UKESM) that includes fully interactive chemistryaerosol- cloud-radiation processes and simulates the whole atmosphere from the surface to the mesosphere. We conducted 30-year numerical simulations using two configurations of the UKESM, each with a different atmospheric chemistry scheme. The first couples Strattrop, a simplified chemistry scheme designed for whole-atmosphere simulations on a global scale. The second couples CRI, an extended version of Strattrop with enhanced ozone chemistry. To assess their simulation performance over East Asia, simulated results of UKESM-Strattrop and UKESM-CRI were compared with reanalysis data and satellite observations over the period 2003~2010. Both UKESM reasonably simulated surface air temperature compared to ERA5, but UKESM-CRI exhibited weaker performance over the ocean. For precipitation, both models overestimated summer rainfall with UKESM-CRI showing a lower correlation with ERA5. Through comparisons between the two current models, it is noted that the enhanced ozone chemistry did not improve the simulation of surface temperature and precipitation. In comparisons of simulated air quality results, UKESM-CRI showed better performance in simulating air pollutants such as sulfur dioxide and ozone. Both simulations overestimated aerosol optical depth compared to satellite data, likely due to the insufficient representation of secondary organic aerosols in UKESM. However, current global model evaluation study of climate and air quality over East Asia, as a first attempt, sheds light on future advanced ESM studies of simulating air quality and climate simultaneously in that UKESM can simulate air pollutants and climate over East Asia to an agreeable degree. Therefore, UKESM is expected to serve as a useful tool for predicting both air quality and climate at the same time and for climate change assessment. KCI Citation Count: 0