Aging of biogenic secondary organic aerosol via gas-phase OH radical reactions
Artikel i vetenskaplig tidskrift, 2012
The Multiple Chamber Aerosol Chemical Aging Study (MUCHACHAS) tested the hypothesis that hydroxyl radical (OH) aging significantly increases the concentration of first-generation biogenic secondary organic aerosol (SOA). OH is the dominant atmospheric oxidant, and MUCHACHAS employed environmental chambers of very different designs, using multiple OH sources to explore a range of chemical conditions and potential sources of systematic error. We isolated the effect of OH aging, confirming our hypothesis while observing corresponding changes in SOA properties. The mass increases are consistent with an existing gap between global SOA sources and those predicted in models, and can be described by a mechanism suitable for implementation in those models.
biosphere-atmosphere interactions
chemistry
chamber
alpha-pinene
ozonolysis
particles
yields
volatility basis-set
model
pinonic acid
atmospheric chemistry
mass-spectrometer
Författare
N. M. Donahue
K. M. Henry
Th. F. Mentel
A. Kiendler-Scharr
C. Spindler
B. Bohn
T. Brauers
H. P. Dorn
H. Fuchs
R. Tillmann
A. Wahner
H. Saathoff
K. H. Naumann
O. Mohler
T. Leisner
L. Muller
M. C. Reinnig
T. Hoffmann
Kent Salo
Göteborgs universitet
Mattias Hallquist
Göteborgs universitet
M. Frosch
M. Bilde
T. Tritscher
P. Barmet
A. P. Praplan
P. F. DeCarlo
J. Dommen
A. S. H. Prevot
U. Baltensperger
Proceedings of the National Academy of Sciences of the United States of America
0027-8424 (ISSN) 1091-6490 (eISSN)
Vol. 109 34 13503-13508Ämneskategorier
Fysikalisk kemi
Analytisk kemi
Kemi
Miljövetenskap
Klimatforskning
Organisk kemi
DOI
10.1073/pnas.1115186109