气候变化领域集成服务门户(CCPortal): Global Importance of Hydroxymethanesulfonate in Ambient Particulate Matter: Implications for Air Quality

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DOI	10.1029/2020JD032706
	Global Importance of Hydroxymethanesulfonate in Ambient Particulate Matter: Implications for Air Quality
	Moch J.M.; Dovrou E.; Mickley L.J.; Keutsch F.N.; Liu Z.; Wang Y.; Dombek T.L.; Kuwata M.; Budisulistiorini S.H.; Yang L.; Decesari S.; Paglione M.; Alexander B.; Shao J.; Munger J.W.; Jacob D.J.
发表日期	2020
ISSN	2169897X
卷号	125 期号:18
英文摘要	Sulfur compounds are an important constituent of particulate matter, with impacts on climate and public health. While most sulfur observed in particulate matter has been assumed to be sulfate, laboratory experiments reveal that hydroxymethanesulfonate (HMS), an adduct formed by aqueous phase chemical reaction of dissolved HCHO and SO2, may be easily misinterpreted in measurements as sulfate. Here we present observational and modeling evidence for a ubiquitous global presence of HMS. We find that filter samples collected in Shijiazhuang, China, and examined with ion chromatography within 9 days show as much as 7.6 μg m−3 of HMS, while samples from Singapore examined 9–18 months after collection reveal ~0.6 μg m−3 of HMS. The Shijiazhuang samples show only minor traces of HMS 4 months later, suggesting that HMS had decomposed over time during sample storage. In contrast, the Singapore samples do not clearly show a decline in HMS concentration over 2 months of monitoring. Measurements from over 150 sites, primarily derived from the IMPROVE network across the United States, suggest the ubiquitous presence of HMS in at least trace amounts as much as 60 days after collection. The degree of possible HMS decomposition in the IMPROVE observations is unknown. Using the GEOS-Chem chemical transport model, we estimate that HMS may account for 10% of global particulate sulfur in continental surface air and over 25% in many polluted regions. Our results suggest that reducing emissions of HCHO and other volatile organic compounds may have a co-benefit of decreasing particulate sulfur. ©2020. The Authors.
英文关键词	aerosols; air pollution; cloud chemistry; formaldehyde; hydroxymethanesulfonate; sulfate
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185777
作者单位	Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States; John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, United States; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Analytical Sciences Division, RTI International, Research Triangle Park, Durham, NC, United States; Asian School of the Environment and Earth Observatory of Singapore, Nanyang Technological University, Singapore; Now in the Department of Atmospheric and Oceanic Sciences, School of Physics, and BIC-ESAT, Peking University, Beijing, China; Now in Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, United Kingdom; Italian National Research Council - Institute of Atmospheric Sciences and Climate (CNR-ISAC), Bol...
推荐引用方式 GB/T 7714	Moch J.M.,Dovrou E.,Mickley L.J.,et al. Global Importance of Hydroxymethanesulfonate in Ambient Particulate Matter: Implications for Air Quality[J],2020,125(18).
APA	Moch J.M..,Dovrou E..,Mickley L.J..,Keutsch F.N..,Liu Z..,...&Jacob D.J..(2020).Global Importance of Hydroxymethanesulfonate in Ambient Particulate Matter: Implications for Air Quality.Journal of Geophysical Research: Atmospheres,125(18).
MLA	Moch J.M.,et al."Global Importance of Hydroxymethanesulfonate in Ambient Particulate Matter: Implications for Air Quality".Journal of Geophysical Research: Atmospheres 125.18(2020).