气候变化领域集成服务门户(CCPortal): Contribution of hydroxymethanesulfonate (HMS) to severe winter haze in the North China Plain

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DOI	10.5194/acp-20-5887-2020
	Contribution of hydroxymethanesulfonate (HMS) to severe winter haze in the North China Plain
	Ma T.; Furutani H.; Duan F.; Kimoto T.; Jiang J.; Zhang Q.; Xu X.; Wang Y.; Gao J.; Geng G.; Li M.; Song S.; Ma Y.; Che F.; Wang J.; Zhu L.; Huang T.; Toyoda M.; He K.
发表日期	2020
ISSN	16807316
起始页码	5887
结束页码	5897
卷号	20 期号:10
英文摘要	Severe winter haze accompanied by high concentrations of fine particulate matter (PM2.5) occurs frequently in the North China Plain and threatens public health. Organic matter (OM) and sulfate are recognized as major components of PM2.5, while atmospheric models often fail to predict their high concentrations during severe winter haze due to incomplete understanding of secondary aerosol formation mechanisms. By using a novel combination of single-particle mass spectrometry and an optimized ion chromatography method, here we show that hydroxymethanesulfonate (HMS), formed by the reaction between formaldehyde (HCHO) and dissolved SO2 in aerosol water, is ubiquitous in Beijing during winter. The HMS concentration and the molar ratio of HMS to sulfate increased with the deterioration of winter haze. High concentrations of precursors (SO2 and HCHO) coupled with low oxidant levels, low temperature, high relative humidity, and moderately acidic pH facilitate the heterogeneous formation of HMS, which could account for up to 15 of OM in winter haze and lead to up to 36 overestimates of sulfate when using traditional ion chromatography. Despite the clean air actions having substantially reduced SO2 emissions, the HMS concentration and molar ratio of HMS to sulfate during severe winter haze increased from 2015 to 2016 with the growth in HCHO concentration. Our findings illustrate the significant contribution of heterogeneous HMS chemistry to severe winter haze in Beijing, which helps to improve the prediction of OM and sulfate and suggests that the reduction in HCHO can help to mitigate haze pollution. © Author(s) 2020.
关键词	atmospheric chemistry atmospheric pollution concentration (composition)haze ion chromatography mass spectrometry organic matter particulate matter severe weather sulfate winter Beijing [China]China North China Plain
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132026
推荐引用方式 GB/T 7714	Ma T.,Furutani H.,Duan F.,et al. Contribution of hydroxymethanesulfonate (HMS) to severe winter haze in the North China Plain[J]. Atmospheric Chemistry and Physics,2020,20(10).
APA	Ma T..,Furutani H..,Duan F..,Kimoto T..,Jiang J..,...&He K..(2020).Contribution of hydroxymethanesulfonate (HMS) to severe winter haze in the North China Plain.,20(10).
MLA	Ma T.,et al."Contribution of hydroxymethanesulfonate (HMS) to severe winter haze in the North China Plain".20.10(2020).