Objectif Problems to be solvedThe project proposes actions to detect, understand, assess and predict global change processes and to contribute to the European component of the global observing systems. It answers to interrogations of the origin, budget and evolution in the upper troposphere and lower stratosphere (UT/LS) of chemical species (ozone, water vapour) which have impact on air quality and climate, with special attention to the impact of aircraft emissions.Scientific objectives and approachThe MOZAIC-III project is designed for the evaluation of ozone and water vapour budgets in the tropopause region. It takes full advantage of the measuring capabilities of the in-service aircraft already equipped and of the database (O3, H2O) built up since August 1994. The purpose is to improve the current understanding on the processes active in this region of the atmosphere (UT/LS), and particularly on the aircraft impact. MOZAIC-III corresponds to installation, on the aircraft measuring units, of new CO and NOy devices and to the extension of the existing database of O3 and H2O measurements below 12 km altitude with simultaneous measurements of CO and NOy, in order to better characterise the origin of the air parcels sampled and the combined effects of transport and chemistry. The database is opened to the European research community. Data are analysed using statistical correlation, modelling of chemistry and dynamics, satellite data (ENVISAT, METEOSAT, TOVS) and assimilation methods. The duration of the series over almost 9 years allows analysing trends, interannual variability, and correlations between species. The numerous data collected at a quasi global scale are used to improve current understanding of tropospheric chemical and dynamical processes and to quantify the ozone budget in the UT/LS region: stratospheric contribution, transport of pollution from PBL, free tropospheric formation, productions from NOx emitted by aircraft and NOx induced by lightning, surface deposition, chemical losses. The relation between upper tropospheric water vapour and sea surface temperature over tropical, sub-tropical and mid-latitude regions is investigated.Expected impactsFrom the whole set of data collected since 1994, it is expected to assess the budget and trends of ozone and water vapour in the UT/LS, to reduce uncertainties on stratosphere / troposphere exchanges, to improve existing 3D CTM models and to better quantify the impact of subsonic aircraft. These results are of major concern for the evaluation of climate change. Champ scientifique natural sciencescomputer and information sciencesdatabasesnatural scienceschemical sciencesinorganic chemistryinorganic compoundsnatural sciencesearth and related environmental sciencesenvironmental sciencespollutionnatural sciencesearth and related environmental sciencesatmospheric sciencesclimatologyclimatic changesnatural sciencesearth and related environmental sciencesatmospheric sciencesmeteorologytroposphere Programme(s) FP5-EESD - Programme for research, technological development and demonstration on "Energy, environment and sustainable development, 1998-2002" Thème(s) 1.1.4.-2. - Key action Global Change, Climate and Biodiversity Appel à propositions Data not available Régime de financement CSC - Cost-sharing contracts Coordinateur CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Contribution de l’UE Aucune donnée Adresse 14,Avenue Edouard Belin 14 31400 TOULOUSE France Voir sur la carte Coût total Aucune donnée Participants (7) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE France Contribution de l’UE Aucune donnée Adresse Avenue Gustave Coriolis 42, C.N.R. MTtTorologique 31057 TOULOUSE Voir sur la carte Coût total Aucune donnée CENTRE NATIONAL DE RECHERCHES MÉTÉOROLOGIQUES METEO FRANCE France Contribution de l’UE Aucune donnée Adresse Avenue Gustave Coriolis 42 31057 TOULOUSE Voir sur la carte Coût total Aucune donnée FORSCHUNGSZENTRUM JUELICH GMBH Allemagne Contribution de l’UE Aucune donnée Adresse Leo-Brandt-Strasse 52425 Jülich Voir sur la carte Coût total Aucune donnée GIE AIRBUS INDUSTRIE France Contribution de l’UE Aucune donnée Adresse 1,Rond-Point Maurice Bellonte 1 31707 BLAGNAC Voir sur la carte Coût total Aucune donnée UNIVERSITE PAUL SABATIER DE TOULOUSE III France Contribution de l’UE Aucune donnée Adresse Avenue Edouard Belin 14 31400 TOULOUSE Voir sur la carte Coût total Aucune donnée UNIVERSITY OF READING Royaume-Uni Contribution de l’UE Aucune donnée Adresse Earley Gate 2, Whiteknights RG6 6BB READING / SILCHESTER Voir sur la carte Coût total Aucune donnée University of Cambridge Royaume-Uni Contribution de l’UE Aucune donnée Adresse Lensfield Road CB2 1EW Cambridge Voir sur la carte Coût total Aucune donnée