Jung-Woo Yoo, Soon-Young Park, Wonbae Jeon, Jia Jung, Jaehyeong Park, Jeonghyeok Mun, Dongjin Kim, Soon-Hwan Lee
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引用次数: 0
Abstract
This study evaluated the impact of the aerosol direct effect (ADE) on the meteorological conditions and air quality in Seoul, South Korea (Korea), using the WRF-CMAQ coupled model. Two experiments were conducted: NF simulation without the ADE feedback and YF simulation with the ADE feedback. The ADE resulted in a decrease in shortwave radiation at the surface and an increase in shortwave radiation in the atmosphere. Additionally, the 2-m temperature, 10-m wind speed, and planetary boundary layer (PBL) height decreased. The changes in meteorological conditions due to ADE-induced atmospheric stability and restrained vertical mixing resulted in deteriorated air quality. During the simulation, PM2.5 concentrations increased due to ADE, with daily averages rising by 4.2 µg·m−3 on transport day and 3.2 µg·m−3 on accumulation day. Process analysis (PA) was employed to investigate contributions of physical/chemical processes affecting ADE. Local emissions, aerosol processes, and horizontal advection were identified as key factors in PM2.5 increases in Seoul. Differences in the contributions of processes were noted between transport and accumulation day due to ADE considerations. On transport day, the YF simulation exhibited a higher influx of PM2.5 through horizontal advection, attributed to transport from upwind regions. Conversely, on accumulation day, horizontal advection decreased due to enhanced atmospheric stability, while vertical transport increased from restrained vertical mixing induced by ADE. Thus, ADE emphasized the contribution of processes to PM2.5. Emissions and horizontal advection were primary contributors on transport day, while the emissions process dominated on accumulation day.
期刊介绍:
Air Quality, Atmosphere, and Health is a multidisciplinary journal which, by its very name, illustrates the broad range of work it publishes and which focuses on atmospheric consequences of human activities and their implications for human and ecological health.
It offers research papers, critical literature reviews and commentaries, as well as special issues devoted to topical subjects or themes.
International in scope, the journal presents papers that inform and stimulate a global readership, as the topic addressed are global in their import. Consequently, we do not encourage submission of papers involving local data that relate to local problems. Unless they demonstrate wide applicability, these are better submitted to national or regional journals.
Air Quality, Atmosphere & Health addresses such topics as acid precipitation; airborne particulate matter; air quality monitoring and management; exposure assessment; risk assessment; indoor air quality; atmospheric chemistry; atmospheric modeling and prediction; air pollution climatology; climate change and air quality; air pollution measurement; atmospheric impact assessment; forest-fire emissions; atmospheric science; greenhouse gases; health and ecological effects; clean air technology; regional and global change and satellite measurements.
This journal benefits a diverse audience of researchers, public health officials and policy makers addressing problems that call for solutions based in evidence from atmospheric and exposure assessment scientists, epidemiologists, and risk assessors. Publication in the journal affords the opportunity to reach beyond defined disciplinary niches to this broader readership.