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 13503-13508

Ämneskategorier

Fysikalisk kemi

Analytisk kemi

Kemi

Miljövetenskap

Klimatforskning

Organisk kemi

DOI

10.1073/pnas.1115186109