Objective Problems to be solvedThe proposed research programme is designed to resolve many of the outstanding key issues concerning the chemical transformation of DMS so that a reliable quantitative appraisal can be made of its contribution to CCN formation and consequently an assessment of the magnitude of its regulatory role in climate. Past work on the atmospheric chemistry has been instrumental in highlighting very specific processes, which need to be investigated in detail if a reliable assessment of the relationship between DMS, CCN and climate is to be made. The continuing improvement in analytical techniques now makes it possible to make high quality and high time resolution measurements of many species, both in the laboratory and in the field, which were previously either not possible or only with large error limits and poor time resolution.Scientific objectives and approachThe major objectives of the project are1) to put constrains on the large uncertainties associated with current photochemical models by providing more accurate gas-phase kinetic and photochemical data on DMS oxidation chemistry.2) Investigate particle formation from both DMS and DMSO.3) Simultaneous high-time resolution measurements of dimethyl sulphide, oxidation products, halogen oxides, NO3 radical, and aerosol number/size distribution in 3 campaigns at sites with different geographical locations reflecting distinct aspects of DMS chemistry.4) Use the data to determine the relative importance of the oxidants OH, NO3 and halogen oxides under different atmospheric conditions.5) Use the laboratory data to construct a DMS chemistry module for CT-models capable of describing both the remote and polluted marine atmosphere and test of the models against the field data. The objectives will be achieved by a closely co-ordinated amalgamation of laboratory, field and modelling investigations.Expected impactsThe main deliverables of the project will initially be progressive constraints on kinetic/ mechanistic aspects of the oxidation chemistry of DMS and DMSO from laboratory and field experiments. This will be accompanied by high-time resolution field measurements of DMS, oxidation products, aerosols and other products relevant to the photochemistry. Based on this laboratory and field information a comprehensive gas/aerosol DMS-halogen-chemistry mechanism (g/a-DMS-HALO) module for incorporation in CT-models will be developed, which will be capable of describing DMS chemistry in both the remote and polluted marine atmosphere. The information can eventually be incorporated into global climatic models. Fields of science natural scienceschemical scienceselectrochemistryelectrolysisnatural scienceschemical sciencesphysical chemistryphotochemistrynatural scienceschemical sciencesinorganic chemistryhalogens Programme(s) FP5-EESD - Programme for research, technological development and demonstration on "Energy, environment and sustainable development, 1998-2002" Topic(s) 1.1.4.-2. - Key action Global Change, Climate and Biodiversity Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator BERGISCHE UNIVERSITAET GESAMTHOCHSCHULE WUPPERTAL EU contribution No data Address Gauss-Straße 20 42097 WUPPERTAL Germany See on map Total cost No data Participants (10) Sort alphabetically Sort by EU Contribution Expand all Collapse all CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE France EU contribution No data Address Avenue de la Terrasse, BFtiment 12 91198 GIF SUR YVETTE See on map Total cost No data CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE France EU contribution No data Address Avenue de la Recherche Scientifique 1 C 45071 ORLEANS See on map Total cost No data COMMISSION OF THE EUROPEAN COMMUNITIES Italy EU contribution No data Address Via Enrico Fermi TP 290 21020 ISPRA See on map Total cost No data DANISH METEOROLOGICAL INSTITUTE Denmark EU contribution No data Address 100,Lyngbyvej 100 2100 KOEPENHAGEN See on map Total cost No data FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. Germany EU contribution No data Address Nikolai-Fuchs-Strasse 1 30625 HANNOVER See on map Links Website Opens in new window Total cost No data FUNDACION CENTRO DE ESTUDIOS AMBIENTALES DEL MEDITERRANEO Spain EU contribution No data Address C/ Charles R. Darwin 14 - Parque Tecnológico - Se 46980 CAMPAMENTO/PATERNA See on map Total cost No data NORWEGIAN INSTITUTE FOR AIR RESEARCH Norway EU contribution No data Address Instituttveien 18 2027 KJELLER See on map Total cost No data RUPRECHT-KARLS-UNIVERSITAET HEIDELBERG Germany EU contribution No data Address Im Neuenheimer Feld 229 69117 HEIDELBERG See on map Total cost No data UNIVERSIDAD DE CASTILLA-LA MANCHA Spain EU contribution No data Address Campus Universitario SN 13071 CIUDAD REAL See on map Total cost No data UNIVERSITY OF CRETE Greece EU contribution No data Address Knossos Avenue 71409 IRAKLION See on map Total cost No data