TY  - JOUR
A1  - Hoyle, Christopher Robert
A1  - Fuchs, Claudia
A1  - Järvinen, Emma
A1  - Saathoff, Harald
A1  - Dias, Antonio
A1  - El Haddad, Imad
A1  - Gysel, Martin
A1  - Coburn, Sean C.
A1  - Tröstl, Jasmin
A1  - Bernhammer, Anne-Kathrin
A1  - Bianchi, Federico
A1  - Breitenlechner, Martin
A1  - Corbin, Joel C.
A1  - Craven, Jill
A1  - Donahue, Neil McPherson
A1  - Duplissy, Jonathan
A1  - Ehrhart, Sebastian
A1  - Frege, Carla
A1  - Gordon, Hamish
A1  - Höppel, Niko Florian
A1  - Heinritzi, Martin
A1  - Kristensen, Thomas Bjerring
A1  - Molteni, Ugo
A1  - Nichman, Leonid
A1  - Pinterich, Tamara
A1  - Prévôt, André Stephan Henry
A1  - Simon, Mario
A1  - Slowik, Jay G.
A1  - Steiner, Gerhard
A1  - Tomé, Antonio
A1  - Vogel, Alexander L.
A1  - Volkamer, Rainer
A1  - Wagner, Andrea Christine
A1  - Wagner, Robert
A1  - Wexler, Anthony S.
A1  - Williamson, Christina
A1  - Winkler, Paul M.
A1  - Yan, Chao
A1  - Amorim, Antonio
A1  - Dommen, Josef
A1  - Curtius, Joachim
A1  - Gallagher, Martin William
A1  - Flagan, Richard C.
A1  - Hansel, Armin
A1  - Kirkby, Jasper
A1  - Kulmala, Markku
A1  - Möhler, Ottmar
A1  - Stratmann, Frank
A1  - Worsnop, Douglas R.
A1  - Baltensperger, Urs
T1  - Aqueous phase oxidation of sulphur dioxide by ozone in cloud droplets
T2  - Atmospheric chemistry and physics / Discussions
N2  - The growth of aerosol due to the aqueous phase oxidation of sulfur dioxide by ozone was measured in laboratory-generated clouds created in the Cosmics Leaving OUtdoor Droplets (CLOUD) chamber at the European Organization for Nuclear Research (CERN). Experiments were performed at 10 and −10 °C, on acidic (sulfuric acid) and on partially to fully neutralised (ammonium sulfate) seed aerosol. Clouds were generated by performing an adiabatic expansion – pressurising the chamber to 220 hPa above atmospheric pressure, and then rapidly releasing the excess pressure, resulting in a cooling, condensation of water on the aerosol and a cloud lifetime of approximately 6 min. A model was developed to compare the observed aerosol growth with that predicted using oxidation rate constants previously measured in bulk solutions. The model captured the measured aerosol growth very well for experiments performed at 10 and −10 °C, indicating that, in contrast to some previous studies, the oxidation rates of SO2 in a dispersed aqueous system can be well represented by using accepted rate constants, based on bulk measurements. To the best of our knowledge, these are the first laboratory-based measurements of aqueous phase oxidation in a dispersed, super-cooled population of droplets. The measurements are therefore important in confirming that the extrapolation of currently accepted reaction rate constants to temperatures below 0 °C is correct.
Y1  - 2015
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/39567
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-395670
VL  - 15
SP  - 33843
EP  - 33896
PB  - European Geosciences Union
CY  - Katlenburg-Lindau
ER  -