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Cloud droplet activation through oxidation of organic aerosol influenced by temperature and particle phase state: CLOUD ACTIVATION BY AGED ORGANIC AEROSOL

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2016GL072424· OSTI ID:1344233
 [1];  [2];  [3];  [4];  [3];  [5];  [6]
  1. Stony Brook University, Institute for Terrestrial and Planetary Atmospheres, School of Marine and Atmospheric Sciences, Stony Brook NY USA; Now at Purdue University, Department of Chemistry, West Lafayette IN USA
  2. Max Planck Institute for Chemistry, Multiphase Chemistry Department, Mainz Germany; University of California, Irvine, Department of Chemistry, Irvine CA USA
  3. Max Planck Institute for Chemistry, Multiphase Chemistry Department, Mainz Germany
  4. Max Planck Institute for Chemistry, Multiphase Chemistry Department, Mainz Germany; Institute for Environmental and Climate Research, Jinan University, Guangzhou China
  5. Brookhaven National Laboratory, Environmental and Climate Sciences Department, Upton NY USA
  6. Stony Brook University, Institute for Terrestrial and Planetary Atmospheres, School of Marine and Atmospheric Sciences, Stony Brook NY USA
+ Show Author Affiliations

Chemical aging of organic aerosol (OA) through multiphase oxidation reactions can alter their cloud condensation nuclei (CCN) activity and hygroscopicity. However, the oxidation kinetics and OA reactivity depend strongly on the particle phase state, potentially influencing the hydrophobic-to-hydrophilic conversion rate of carbonaceous aerosol. Here, amorphous Suwannee River fulvic acid (SRFA) aerosol particles, a surrogate humic-like substance (HULIS) that contributes substantially to global OA mass, are oxidized by OH radicals at different temperatures and phase states. When oxidized at low temperature in a glassy solid state, the hygroscopicity of SRFA particles increased by almost a factor of two, whereas oxidation of liquid-like SRFA particles at higher temperatures did not affect CCN activity. Low-temperature oxidation appears to promote the formation of highly-oxygenated particle-bound fragmentation products with lower molar mass and greater CCN activity, underscoring the importance of chemical aging in the free troposphere and its influence on the CCN activity of OA.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); National Science Foundation (NSF); European Union (EU); Max Planck Society
Grant/Contract Number:
SC0012704
OSTI ID:
1344233
Report Number(s):
BNL--113518-2017-JA; KP1701000
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 3 Vol. 44; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Influence of particle viscosity on mass transfer and heterogeneous ozonolysis kinetics in aqueous–sucrose–maleic acid aerosol journal January 2018
Second inflection point of water surface tension in the deeply supercooled regime revealed by entropy anomaly and surface structure using molecular dynamics simulations journal January 2019
Compositional evolution of particle-phase reaction products and water in the heterogeneous OH oxidation of model aqueous organic aerosols journal January 2017
Influence of relative humidity on the heterogeneous oxidation of secondary organic aerosol journal January 2018
Isotopic constraints on the atmospheric sources and formation of nitrogenous species in clouds influenced by biomass burning journal January 2019
Photomineralization mechanism changes the ability of dissolved organic matter to activate cloud droplets and to nucleate ice crystals journal January 2019
Effects of inorganic salts on the heterogeneous OH oxidation of organic compounds: insights from methylglutaric acid–ammonium sulfate journal January 2019

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
OH oxidation
chemical aging
cloud formation
hygroscopicity
organic aerosol
viscosity