Chemical mechanisms of atmospheric processes

Directorate-General For Research And Innovation European Commission

Description

Proceedings of the EC workshop, Copenhagen, Denmark, 24 and 25 August 1998
Environmental research
Environment policy and protection of the environment

Sujets

• Sciences et techniques

Informations

• Publié par: DIRECTORATE-GENERAL-FOR-RESEARCH-AND-INNOVATION-EUROPEAN-COMMISSION
• Nombre de lectures: 41
• Langue: English
• Poids de l'ouvrage: 6 Mo

Extrait

European Commission
Community research
Proceedings
Air pollution «arch report 6)
Chemical mechanisms of
atmospheric processes
EUR 18765
taSBP
ENERGY, ENVIRONMENT
AND SUSTAINABLE DEVELOPMENT European Commission
EC/DG XII Cluster 4 — Chemical processes and mechanisms
Chemical mechanisms of
atmospheric processes
Proceedings of the EC workshop
Copenhagen, Denmark
24 and 25 August 1998
Edited by
Karl H. Becker
University of Wuppertal (physical chemistry)
and
Giovanni Angeletti
European Commission, DG Xll/D. 1, Brussels
Directorate-General
Science, Research and Development
1999 EUR 18765 LEGAL NOTICE
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Cataloguing data can be found at the end of this publication.
Luxembourg: Office for Official Publications of the European Communities, 1999
ISBN 92-828-5774-3
© European Communities, 1999
Reproduction is authorised provided the source is acknowledged.
Printed in Belgium Preface
On August 24 and 25, 1998, an EC­Workshop «Chemical Mechanisms of Atmospheric Processes»
has been organised by K.H. Becker, Wuppertal, R.A. Cox, Cambridge, G. Le Bras, Orleans, and
O.J. Nielsen, Risø, in Copenhagen.
A total of 74 European scientists working in the field of atmospheric chemistry attended the meet­
ing. The book contains extended abstracts of the contributions presented, which consisted of 22 oral
papers and 48 posters. The EC/DG 12 cluster 4 "Chemical Processes and Mechanisms" for which
K.H. Becker and G. Le Bras act as rapporteurs formed the core of the workshop. The cluster 4
coordinators gave progress reports for all the projects, AEROBIC, AFCAR, BIOVOC, DIFUSO,
DOMAC, EUROSOLV, EUROVOC, HALOBUD, INFORMATEX, RADICAL, RINOXA 2 and
UNARO. In addition, reports on 2 projects from other clusters but with strong links to cluster 4,
NUCVOC and SAMPLER, were given by their coordinators. A special report was presented on the
work implemented using the Photoreactor EUPHORE in Valencia. Essentially all European labo­
ratories involved in kinetic and mechanistic studies on atmospheric reactions were present at the
workshop. Half a day was devoted to stratospheric laboratory research, for which progress reports
on the projects CHEMICON, COBRA, LAMOCS and LEXIS were presented. Two poster contri­
butions on stratospheric laboratory research were also given.
It was evident from both the oral reports as well as the very interesting poster presentations that
remarkable progress has been achieved in the attainment of new kinetic data and also in reaching a
much better mechanistic understanding of important atmospheric chemical processes. It is now well
accepted that a multiphase approach to studies of c l systems is necessary and
has been reached, to some extent, during the last years.
With respect to the Chemical Mechanism Development (CMD) project of EUROTRAC­2, on
which another workshop has been organised on September 23­25, 1998 in Karlsruhe, it was con­
cluded from the discussion that a common workshop in 1999 should be envisaged. Present plans
already include consideration for such a meeting during the second half of 1999, in Aachen.
We would like to express our thanks to the hosts of the workshop, O.J. Nielsen and the Chemistry
Department of the Copenhagen University, for the efficient organisation of the workshop.
Karl H. Becker Giovanni Angeletti
UniversityWuppertalEuropean Commission, DG ΧΠ
III Scientific Organisers: K.H. Becker, University of Wuppertal, Germany
R. A. Cox,y of Cambridge, UK
G. LeBras, C.N.R.S. Orléans, France
O.J. Nielsen, Risø National Laboratory, Roskilde, Denmark
O.J. Nielsen, Risø National Laboratory, Roskilde, Denmark Local Organiser:
The financial support by the European Commission is Financial Support:
gratefully acknowledged.
V INDEX
A) Oral Contributions
Session I - EC Cluster 4: Chemical Processes and Mechanisms
F. Zabel, O.J. Nielsen, R. Lesclaiix, W.R. Stockwell, T. Bérces
Atmospheric Fate of Carbonyl Radicals (AFCAR) 1
L. Ruppert
Measurements in the EuropeanPhotoreactor­EUPHORE: Contributions to the
Understanding of TroposphericChemicalProcesses3
J. Hjorth, Κ. Η. Becker, G. Hayman,E.Ljungström, G. Moortgat and K. Wirtz
Degradation Mechanisms of BiogenicVOC(BIOVOC)11
G. Moortgat
Evaluation of Radical Sources in Atmospheric Chemistry through Chamber and
Laboratory Studies 17
P.W.Seakins
StructureActivityRelationships for the Degradation of Biogenic Volatile Organic
Compounds(SARBVOC):'A Journey into Uncertainty' 23
H. SidebottomandJ.Wenger
ControlStrategiesforEuropean Air QualityBasedontheTropospheric Oxidation
CharacteristicsofVolatileOrganic compounds(EUROVOC):A Summary Report 31
//. Sidebottom and J. Wenger
Reduction of Tropospheric Ozone Formation in Europe by the Employment of
Alternative Industrial Solvents (EUROSOLV): A Progress Report 33
/. Barnes
Atmospheric Reactivity of Fuel Additives and ExhaustGasSamples:
Gas Phase Degradation of Oxygenated Organic CompoundsintheTroposphere 35
P. Wiesen
Diesel Fuel and Soot: Fuel Formulation and Its Atmospheric Implications 43
H. Geiger
Sampling Device for the Measurement of Peroxy Radicals in AtmosphericSystems 49
B. Bonsang
Aerosol Formation from Biogenic Organic Carbon (AEROBIC) 51
VII T. Hoffmann
Nucleation Processes from Oxidation of Biogenic Volatile Organic Compounds 61
O.J. Nielsen and H. Sidebottom
HALOBUD Status 63
G. LeBras
DimethylSulphide(DMS):Oxidation Mechanism in Relation to Aerosols and Climate
(DOMACProject)67
H. Herrmann,R.Zellner,Ph. Mirabel, Chr. George, G. Buxton, A. Salmon, K. Sehested,
J. Holcman and O. Brede
Removal and Interconversions of Oxidants in the Atmospheric Aqueous Phase, Part 2 69
B. Rindone, M. Pilling, H. Herrmann and W. Behnke
Uptake and Nitration of Aromatics in the Tropospheric Aqueous Phase (UNARO) 77
Session II - Stratospheric Projects
R. A. Cox
Laboratory Experiments of Iodine Chemistry in the Stratosphere (LEXIS) 83
G. Le Bras
Kinetics and Mechanism of Gas Phase Reactions Involving IodineInfluencingOzone "'
O. Schrems
Laboratory Studies of Physico-Chemical Properties and Heterogeneous Chemistry of
Stratospheric Sulfate Aerosols "'
F. Stordal, I. Fløisand,Β.Rognerudand I.S.A. Isaksen
Modelling StudiesofSelectedHeterogeneous Reactions on Sulfuric Acid Aerosols 93
G. Papagiannopoulos,H.Sidebottomand I. Morozov
Atmospheric DegradationProcessesofHydrofluoroethers99
R. Zellner
Chemistry and Microphysics of Contrail Formation (CHEMICON) 105
R. A. Cox
Coupled Bromine Chemistry Affecting Stratospheric Ozone"'
VIII