| Literature DB >> 22869714 |
Neil M Donahue1, Kaytlin M Henry, Thomas F Mentel, Astrid Kiendler-Scharr, Christian Spindler, Birger Bohn, Theo Brauers, Hans P Dorn, Hendrik Fuchs, Ralf Tillmann, Andreas Wahner, Harald Saathoff, Karl-Heinz Naumann, Ottmar Möhler, Thomas Leisner, Lars Müller, Marc-Christopher Reinnig, Thorsten Hoffmann, Kent Salo, Mattias Hallquist, Mia Frosch, Merete Bilde, Torsten Tritscher, Peter Barmet, Arnaud P Praplan, Peter F DeCarlo, Josef Dommen, Andre S H Prévôt, Urs Baltensperger.
Abstract
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.Entities:
Mesh:
Substances:
Year: 2012 PMID: 22869714 PMCID: PMC3427056 DOI: 10.1073/pnas.1115186109
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205