NO at low concentration can enhance the formation of highly oxygenated biogenic molecules in the atmosphere
(2023) In Nature Communications 14(1).- Abstract
- The interaction between nitrogen monoxide (NO) and organic peroxy radicals (RO2) greatly impacts the formation of highly oxygenated organic molecules (HOM), the key precursors of secondary organic aerosols. It has been thought that HOM production can be significantly suppressed by NO even at low concentrations. Here, we perform dedicated experiments focusing on HOM formation from monoterpenes at low NO concentrations (0 – 82 pptv). We demonstrate that such low NO can enhance HOM production by modulating the RO2 loss and favoring the formation of alkoxy radicals that can continue to autoxidize through isomerization. These insights suggest that HOM yields from typical boreal forest emissions can vary between 2.5%-6.5%, and HOM formation will... (More)
- The interaction between nitrogen monoxide (NO) and organic peroxy radicals (RO2) greatly impacts the formation of highly oxygenated organic molecules (HOM), the key precursors of secondary organic aerosols. It has been thought that HOM production can be significantly suppressed by NO even at low concentrations. Here, we perform dedicated experiments focusing on HOM formation from monoterpenes at low NO concentrations (0 – 82 pptv). We demonstrate that such low NO can enhance HOM production by modulating the RO2 loss and favoring the formation of alkoxy radicals that can continue to autoxidize through isomerization. These insights suggest that HOM yields from typical boreal forest emissions can vary between 2.5%-6.5%, and HOM formation will not be completely inhibited even at high NO concentrations. Our findings challenge the notion that NO monotonically reduces HOM yields by extending the knowledge of RO2-NO interactions to the low-NO regime. This represents a major advance towards an accurate assessment of HOM budgets, especially in low-NO environments, which prevails in the pre-industrial atmosphere, pristine areas, and the upper boundary layer. © 2023, The Author(s). (Less)
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https://lup.lub.lu.se/record/5d9e819b-c0ec-4f13-918a-ccfd574088ef
- author
- Nie, W. ; Roldin, P. LU and Ding, A.
- author collaboration
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Aerosols, Atmosphere, Monoterpenes, Nitric Oxide, Oxidation-Reduction, monoterpene, nitric oxide, organic nitrate, oxygen, peroxy radical, boreal forest, concentration (composition), hydroxyl radical, nitrous oxide, organic matter, oxygenation, radical, terpene, air pollution control, Article, atmosphere, autooxidation, boundary layer, chemical environment, circadian rhythm, comparative study, concentration (parameter), isomerization, mass spectrometry, ozone depletion, ozonolysis, relative humidity, secondary organic aerosol, stratosphere, taiga, temperature, aerosol, oxidation reduction reaction
- in
- Nature Communications
- volume
- 14
- issue
- 1
- article number
- 3347
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:85161252636
- ISSN
- 2041-1723
- DOI
- 10.1038/s41467-023-39066-4
- language
- English
- LU publication?
- yes
- id
- 5d9e819b-c0ec-4f13-918a-ccfd574088ef
- date added to LUP
- 2023-11-13 14:05:38
- date last changed
- 2023-11-13 14:06:30
@article{5d9e819b-c0ec-4f13-918a-ccfd574088ef,
abstract = {{The interaction between nitrogen monoxide (NO) and organic peroxy radicals (RO2) greatly impacts the formation of highly oxygenated organic molecules (HOM), the key precursors of secondary organic aerosols. It has been thought that HOM production can be significantly suppressed by NO even at low concentrations. Here, we perform dedicated experiments focusing on HOM formation from monoterpenes at low NO concentrations (0 – 82 pptv). We demonstrate that such low NO can enhance HOM production by modulating the RO2 loss and favoring the formation of alkoxy radicals that can continue to autoxidize through isomerization. These insights suggest that HOM yields from typical boreal forest emissions can vary between 2.5%-6.5%, and HOM formation will not be completely inhibited even at high NO concentrations. Our findings challenge the notion that NO monotonically reduces HOM yields by extending the knowledge of RO2-NO interactions to the low-NO regime. This represents a major advance towards an accurate assessment of HOM budgets, especially in low-NO environments, which prevails in the pre-industrial atmosphere, pristine areas, and the upper boundary layer. © 2023, The Author(s).}},
author = {{Nie, W. and Roldin, P. and Ding, A.}},
issn = {{2041-1723}},
keywords = {{Aerosols; Atmosphere; Monoterpenes; Nitric Oxide; Oxidation-Reduction; monoterpene; nitric oxide; organic nitrate; oxygen; peroxy radical; boreal forest; concentration (composition); hydroxyl radical; nitrous oxide; organic matter; oxygenation; radical; terpene; air pollution control; Article; atmosphere; autooxidation; boundary layer; chemical environment; circadian rhythm; comparative study; concentration (parameter); isomerization; mass spectrometry; ozone depletion; ozonolysis; relative humidity; secondary organic aerosol; stratosphere; taiga; temperature; aerosol; oxidation reduction reaction}},
language = {{eng}},
number = {{1}},
publisher = {{Nature Publishing Group}},
series = {{Nature Communications}},
title = {{NO at low concentration can enhance the formation of highly oxygenated biogenic molecules in the atmosphere}},
url = {{http://dx.doi.org/10.1038/s41467-023-39066-4}},
doi = {{10.1038/s41467-023-39066-4}},
volume = {{14}},
year = {{2023}},
}