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The effect of tempe...
The effect of temperature and relative humidity on secondary organic aerosol formation from ozonolysis of Δ3-carene
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- Thomsen, Ditte (author)
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
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- Iversen, Emil Mark (author)
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
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- Skønager, Jane Tygesen (author)
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
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- Luo, Yuanyuan (author)
- Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland
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- Li, Linjie (author)
- Gothenburg University,Göteborgs universitet,University of Gothenburg,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,Department of Chemistry and Molecular Biology, University of Gothenburg, 41296 Gothenburg, Sweden
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- Roldin, Pontus (author)
- Lund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Aerosoler,LTH profilområden,Centre for Environmental and Climate Science (CEC),Faculty of Science,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH,Division of Physics, Lund University, 22100 Lund, Sweden;IVL Swedish Environmental Research Institute, 21119 Malmö, Sweden
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- Priestley, Michael (author)
- Gothenburg University,Göteborgs universitet,University of Gothenburg,Department of Chemistry and Molecular Biology, University of Gothenburg, 41296 Gothenburg, Sweden;IVL Swedish Environmental Research Institute, 41133 Gothenburg, Sweden,Institutionen för kemi och molekylärbiologi
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- Pedersen, Henrik B. (author)
- Department of Physics, Aarhus University, Aarhus C, 8000, Denmark
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- Hallquist, Mattias, 1969 (author)
- Gothenburg University,Göteborgs universitet,University of Gothenburg,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,Department of Chemistry and Molecular Biology, University of Gothenburg, 41296 Gothenburg, Sweden
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- Ehn, Mikael (author)
- Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland
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- Bilde, Merete (author)
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
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- Glasius, Marianne (author)
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
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(creator_code:org_t)
- Malmö : IVL Svenska Miljöinstitutet, 2024
- 2024
- English.
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In: Environmental Science. - Malmö : IVL Svenska Miljöinstitutet. - 2634-3606. ; 4:1, s. 88-103
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Abstract
Subject headings
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- This study investigates the effects of temperature and relative humidity (RH) on the formation of secondary organic aerosol (SOA) from D3-carene, a prevalent monoterpene in boreal forests. Dark ozonolysis experiments of 10 ppb D3-carene were conducted in the Aarhus University Research on Aerosol (AURA) atmospheric simulation chamber at temperatures of 0, 10, and 20 °C. Under dry conditions (RH < 2%), the SOA formation in terms of both particle number and mass concentration shows minimal temperature dependence. This is in contrast to previous findings at higher initial concentrations and suggests an effect of VOC loading for D3-carene. Interestingly, the mass fraction of key oxidation products (cis-3-caric acid, cis-3-caronic acid) exhibit a temperature dependence suggesting continuous condensation at lower temperatures, while evaporation and further reactions over time become more favourable at higher temperatures.The oxygen-to-carbon ratios in the particle phase and the occurrence of highly oxygenated organic molecules (HOM) in the gas phase show modest increases with higher temperatures. Predictions from the Aerosol Dynamics and Gas- and Particle-Phase Chemistry Kinetic Multilayer Model (ADCHAM) agrees with the experimental results regarding both physical particle properties and aerosol composition considering theexperimental uncertainties. At high RH (∼80%, 10 °C), a considerable increase in the particle nucleation rate and particle number concentration is observed compared to experiments under dry conditions. This is likely due to enhanced particle nucleation resulting from more stable cluster formation of water and inorganics at increased RH. However, RH does not affect the particle mass concentration.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
Keyword
- S Organic Aerosol; Δ3‑Careneecondary
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Thomsen, Ditte
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Iversen, Emil Ma ...
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Skønager, Jane T ...
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Luo, Yuanyuan
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Li, Linjie
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Roldin, Pontus
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Priestley, Micha ...
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Pedersen, Henrik ...
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Hallquist, Matti ...
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Ehn, Mikael
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Bilde, Merete
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Glasius, Mariann ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
- Articles in the publication
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Environmental Sc ...
- By the university
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IVL Swedish Environmental Research Institute
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Lund University
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University of Gothenburg