Rapid dark aging of biomass burning as an overlooked source of oxidized organic aerosol.
air pollution
biomass burning
nighttime
oxidation
secondary organic aerosol
Journal
Proceedings of the National Academy of Sciences of the United States of America
ISSN: 1091-6490
Titre abrégé: Proc Natl Acad Sci U S A
Pays: United States
ID NLM: 7505876
Informations de publication
Date de publication:
29 12 2020
29 12 2020
Historique:
pubmed:
16
12
2020
medline:
13
2
2021
entrez:
15
12
2020
Statut:
ppublish
Résumé
Oxidized organic aerosol (OOA) is a major component of ambient particulate matter, substantially impacting climate, human health, and ecosystems. OOA is readily produced in the presence of sunlight, and requires days of photooxidation to reach the levels observed in the atmosphere. High concentrations of OOA are thus expected in the summer; however, our current mechanistic understanding fails to explain elevated OOA during wintertime periods of low photochemical activity that coincide with periods of intense biomass burning. As a result, atmospheric models underpredict OOA concentrations by a factor of 3 to 5. Here we show that fresh emissions from biomass burning exposed to NO
Identifiants
pubmed: 33318218
pii: 2010365117
doi: 10.1073/pnas.2010365117
pmc: PMC7776776
doi:
Substances chimiques
Aerosols
0
Air Pollutants
0
Particulate Matter
0
Nitrogen Dioxide
S7G510RUBH
Oxygen
S88TT14065
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
33028-33033Informations de copyright
Copyright © 2020 the Author(s). Published by PNAS.
Déclaration de conflit d'intérêts
The authors declare no competing interest.
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