A Multiscale Tiered Approach to Quantify Contributions: A Case Study of PM2.5 in South Korea During 2010–2017

Atmosphere

HyunCheol Kim¹  Minah Bae²  Soontae Kim²  Byeong-Uk Kim³ 

[1] Air Resources Laboratory, National Oceanic and Atmospheric Administration, College Park, MD 20740, USA;Department of Environmental and Safety Engineering, Ajou University, Suwon 16499, Korea;Georgia Environmental Protection Division, Atlanta, GA 30354, USA;

关键词: pm_2.5;    long-range transport;    source-receptor relationship;    receptor coverage;    model horizontal grid resolution;   

DOI  :  10.3390/atmos11020141

来源: DOAJ

【 摘 要 】

We estimated long-term foreign contributions to the particulate matter of 2.5 μm or less in diameter (PM_2.5) concentrations in South Korea with a set of air quality simulations. The Weather Research and Forecasting (WRF)-Sparse Matrix Operator Kernel Emissions (SMOKE)-Community Multiscale Air Quality (CMAQ) modeling system was used to simulate the base and sensitivity case after a 50% reduction of foreign emissions. The effects of horizontal modeling grid resolutions (27- and 9-km) was also investigated. For this study, we chose PM_2.5 in South Korea during 2010−2017 for the case study and emissions from China as a representative foreign source. The 9-km simulation results show that the 8-year average contribution of the Chinese emissions in 17 provinces ranged from 40−65%, which is ~4% lower than that from the 27-km simulation for the high-tier government segments (particularly prominent in coastal areas). However, for the same comparison for low-tier government segments (i.e., 250 prefectures), the 9-km simulation presented lowered the foreign contribution by up to 10% compared to that from the 27-km simulation. Based on our study results, we recommend using high-resolution modeling results for regional contribution analyses to develop an air quality action plan as the receptor coverage decreases.

【 授权许可】

Unknown