Arctic tropospheric ozone chemistry

Directorate-General For Research And Innovation European Commission

Description

Arctoc: Results from field, laboratory and modelling studies
Research policy and organisation
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: 16
• Langue: English
• Poids de l'ouvrage: 12 Mo

Extrait

ISSN 1018-5593
E U R O P E AN
COMMISSION
Environment and climate programme
Arctic Iropespheric ozone chemistry
nitCTOC
OJR 17783 Œ
Finol Report —Julg 1997 Arctic tropospheric ozone chemistry
flrcloc European Commission
Arctic tropospheric ozone chemistry
Arctoc
Results from field, laboratory ond modelling studies
Flir pol lution research report No 64
Final report of the£U project
Contract No <EV5V-Q93-0318 (DT€F)
Funding period: January 1994 to fìugust 1996
Ulrich Plattand Eckhard Lehrer, editors
Heidelberg, July 1997
Directorate-General
Science, Research and Development
1997 OIR 17783 €N A great deal of additional information on the European Union is available on the Internet.
It can be accessed through the Europa server (http://europa.eu.int).
Cataloguing data can be found at the end of this publication.
Luxembourg: Office for Official Publications of the European Communities, 1997
ISBN 92-828-2350-4
© European Communities, 1997
Reproduction is authorised provided the source is acknowledged.
Printed in Italy
PRINTED ON WHITE CHLORINE-FREE PAPER ν
Foreword
This volume is the final report of the ARCTOC project (1994-1996) supported by the
EC Environment Research Programme of DG XII. The main aim of this project was
to understand the mechanism of sudden polar tropospheric ozone loss events which
were discovered about 10 years ago.
Since then, these episodes had been observed at several Arctic sites, where
tropospheric ozone drops from the normal 30-40 ppb to very low mixing ratios.
The project consisted of coordinated field, laboratory and modelling activities, with
field campaigns in Ny-Alesund, Norway, bringing together 8 research groups from 5
European countries and groups from Canada, United States and New Zealand.
This report describes the results of the three activities, indicating the still remaining'
questions, which need further investigation, concerning in particular the details of
halogen activation mechanism and the comparison of the phenomenon of sudden
ozone loss with the similar one at other latitudes and in Antarctica.
The main result of the project is that the knowledge about the phenomenon is greatly
increased, in particular it can be concluded that the observed polar boundary layer
ozone depletion is caused by bromine and chlorine compounds during favourable
meteorological conditions.
Also it is now clear that anthropogenic influence only plays a minor role in this
phenomenon.
I would like to gratefully acknowledge on behalf of the European Commission the
efforts of all partners who had contributed to the success of this work and special
thanks are due to Prof. U. Piatt for the coordination of the project and to E. Lehrer for
the editorial work of this report.
Giovanni Angeletti
EC, DGXII/D-1 VII
Contents:
Summary 1
ARCTOC -Arctic Tropospheric Ozone Chemistry 3
Introduction 3
The Project 17
Main results8
What have we learned from ARCTOC 26
References 2
Acknowledgements 33
Publications
Appendix A Field Section
Individual contributions from field measurements A-l
1. Overview A-
2. Location and measurement schedule
3. Figures section4
A.l. University of Heidelberg (IUP) A-ll
A.2. Max-Planck-Institute Mainz (MPI) A-89
A.3. Forschungszentrum Jülich (KFA) A-107
A.4. Norwegian Institute for Air Research (NELU) A-133
A.5. Danish Meteorological Institute (DMI) A-15
A. 6* Alfred- Wegener-Institute / Potsdam (A WI) A-181
A.7.* Atmospheric Environment Service / Canada (AES)
A.8.* University of California /Irvine (UCI) A-20
A.9.* National Institute of Water and Atmospheric Research / New Zeeland A-209
* associated partners of ARCTOC i.e. these institutes served not as contractors VIII
Appendix Β Laboratory Section
Individualcontributions from laboratory studies B­l
B.l.LCSR­CNRSOrleans (CNRS)B­l
B.2.BergischeUniversitätWuppertalΒ­15
Β.3.UniversityofEastAnglia, Norwich (UEA) B­29
Appendix C Modelling Section
Individualcontributions from modelling studies C­l
C.l.Max­Planck­InstituteMainz(MPI)C­l
C.2.UniversityofBergen/NorwayC­l1