Global Importance of Hydroxymethanesulfonate in Ambient Particulate Matter: Implications for Air Quality

Autor: Stefano Decesari, Becky Alexander, Jonathan M. Moch, Daniel J. Jacob, Jingyuan Shao, Sri Hapsari Budisulistiorini, Frank N. Keutsch, Tracy Dombek, Loretta J. Mickley, Eleni Dovrou, Mikinori Kuwata, Liudongqing Yang, Zirui Liu, Yuesi Wang, Marco Paglione, J. William Munger
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Atmospheric Science
010504 meteorology & atmospheric sciences
Trace Amounts
Chemical transport model
Pollution: Urban
Regional and Global
air pollution
Air pollution
chemistry.chemical_element
Megacities and Urban Environment
Atmospheric Composition and Structure
hydroxymethanesulfonate
sulfate
medicine.disease_cause
Biogeosciences
01 natural sciences
Aerosol and Clouds
chemistry.chemical_compound
Oceanography: Biological and Chemical
Paleoceanography
Earth and Planetary Sciences (miscellaneous)
medicine
Sulfate
Air quality index
Research Articles
0105 earth and related environmental sciences
Aerosols
Marine Pollution
Particulates
Aerosols and Particles
Decomposition
Sulfur
Oceanography: General
Geophysics
Pollution: Urban and Regional
chemistry
Space and Planetary Science
cloud chemistry
Environmental chemistry
Environmental science
Cloud Physics and Chemistry
formaldehyde
Troposphere: Composition and Chemistry
aerosols
Natural Hazards
Research Article
Zdroj: Journal of Geophysical Research. Atmospheres
Journal of geophysical research. Atmospheres
125 (2020). doi:10.1029/2020JD032706
info:cnr-pdr/source/autori: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./titolo:Global Importance of Hydroxymethanesulfonate in Ambient Particulate Matter: Implications for Air Quality/doi:10.1029%2F2020JD032706/rivista:Journal of geophysical research. Atmospheres (Print)/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume:125
ISSN: 2169-8996
2169-897X
DOI: 10.1029/2020JD032706
Popis: 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.
Key Points New and reanalyzed observations suggest a ubiquitous global presence of hydroxymethanesulfonate (HMS) in particulate matterGEOS‐Chem simulations suggest HMS may comprise over 25% of particulate sulfur in many polluted regions, especially in continental winterReductions of formaldehyde and other volatile organic compounds may have the co‐benefit of reducing particulate sulfur
Databáze: OpenAIRE
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