| Autor: |
Donahue NM; Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15217, USA. nmd@andrew.cmu.edu, Henry KM, Mentel TF, Kiendler-Scharr A, Spindler C, Bohn B, Brauers T, Dorn HP, Fuchs H, Tillmann R, Wahner A, Saathoff H, Naumann KH, Möhler O, Leisner T, Müller L, Reinnig MC, Hoffmann T, Salo K, Hallquist M, Frosch M, Bilde M, Tritscher T, Barmet P, Praplan AP, DeCarlo PF, Dommen J, Prévôt AS, Baltensperger U |
| Jazyk: |
angličtina |
| Zdroj: |
Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2012 Aug 21; Vol. 109 (34), pp. 13503-8. Date of Electronic Publication: 2012 Aug 06. |
| DOI: |
10.1073/pnas.1115186109 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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