GSTDTAP  > 地球科学
DOI10.5194/acp-20-7575-2020
Synergistic enhancement of urban haze by nitrate uptake into transported hygroscopic particles in the Asian continental outflow
Seo, Jihoon1,2; Lim, Yong Bin3; Youn, Daeok4; Kim, Jin Young1; Jin, Hyoun Cher1
2020-06-30
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2020
卷号20期号:12页码:7575-7594
文章类型Article
语种英语
国家South Korea
英文摘要

Haze pollution is affected by local air pollutants, regional transport of background particles and precursors, atmospheric chemistry related to secondary aerosol formation, and meteorological conditions conducive to physical, dynamical, and chemical processes. In the large, populated and industrialized areas like the Asian continental outflow region, the combination of regional transport and local stagnation often exacerbates urban haze pollution. However, the detailed chemical processes underlying the enhancement of urban haze induced by the combined effect of local emissions and transported remote pollutants are still unclear. Here, we demonstrate an important role of transported hygroscopic particles in increasing local inorganic aerosols, by studying the chemical composition of PM2.5 collected between October 2012 and June 2014 in Seoul, a South Korean megacity in the Asian continental outflow region, using the ISOR-ROPIA II thermodynamic model. PM2.5 measured under the condition of regional transport from the upwind source areas in China was higher in mass concentration and richer in secondary inorganic aerosol (SIA) species (SO42-, NO3, and NH4+) and aerosol liquid water (ALW) compared to that measured under non-transport conditions. The secondary inorganic species and ALW were both increased, particularly in cases with high PM2.5 levels, and this indicates inorganic species as a major driver of hygroscopicity. We conclude that the urban haze pollution in a continental outflow region like Seoul, particularly during the cold season, can be exacerbated by ALW in the transported particles, which enhances the nitrate partitioning into the particle phase in NOx- and NH3-rich urban areas. This study reveals the synergistic effect of remote and local sources on urban haze pollution in the downwind region and provides insight into the nonlinearity of domestic and foreign contributions to receptor PM2.5 concentrations in numerical air quality models.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000545952900004
WOS关键词ORGANIC AEROSOL FORMATION ; WINTER HAZE ; AIR-QUALITY ; SEOUL ; SECONDARY ; SULFATE ; ACIDITY ; PM2.5 ; WATER ; EQUILIBRIUM
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/281758
专题地球科学
作者单位1.Korea Inst Sci & Technol, Environm Hlth & Welf Res Ctr, Seoul 02792, South Korea;
2.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 08826, South Korea;
3.Ewha Womans Univ, Dept Chem Engn & Mat Sci, Seoul 03760, South Korea;
4.Chungbuk Natl Univ, Dept Earth Sci Educ, Cheongju 28644, South Korea
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Seo, Jihoon,Lim, Yong Bin,Youn, Daeok,et al. Synergistic enhancement of urban haze by nitrate uptake into transported hygroscopic particles in the Asian continental outflow[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(12):7575-7594.
APA Seo, Jihoon,Lim, Yong Bin,Youn, Daeok,Kim, Jin Young,&Jin, Hyoun Cher.(2020).Synergistic enhancement of urban haze by nitrate uptake into transported hygroscopic particles in the Asian continental outflow.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(12),7575-7594.
MLA Seo, Jihoon,et al."Synergistic enhancement of urban haze by nitrate uptake into transported hygroscopic particles in the Asian continental outflow".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.12(2020):7575-7594.
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