Objetivo 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. Ámbito científico 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 Programa(s) FP5-EESD - Programme for research, technological development and demonstration on "Energy, environment and sustainable development, 1998-2002" Tema(s) 1.1.4.-2. - Key action Global Change, Climate and Biodiversity Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Aportación de la UE Sin datos Dirección 14,Avenue Edouard Belin 14 31400 TOULOUSE Francia Ver en el mapa Coste total Sin datos Participantes (7) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Francia Aportación de la UE Sin datos Dirección Avenue Gustave Coriolis 42, C.N.R. MTtTorologique 31057 TOULOUSE Ver en el mapa Coste total Sin datos CENTRE NATIONAL DE RECHERCHES MÉTÉOROLOGIQUES METEO FRANCE Francia Aportación de la UE Sin datos Dirección Avenue Gustave Coriolis 42 31057 TOULOUSE Ver en el mapa Coste total Sin datos FORSCHUNGSZENTRUM JUELICH GMBH Alemania Aportación de la UE Sin datos Dirección Leo-Brandt-Strasse 52425 Jülich Ver en el mapa Coste total Sin datos GIE AIRBUS INDUSTRIE Francia Aportación de la UE Sin datos Dirección 1,Rond-Point Maurice Bellonte 1 31707 BLAGNAC Ver en el mapa Coste total Sin datos UNIVERSITE PAUL SABATIER DE TOULOUSE III Francia Aportación de la UE Sin datos Dirección Avenue Edouard Belin 14 31400 TOULOUSE Ver en el mapa Coste total Sin datos UNIVERSITY OF READING Reino Unido Aportación de la UE Sin datos Dirección Earley Gate 2, Whiteknights RG6 6BB READING / SILCHESTER Ver en el mapa Coste total Sin datos University of Cambridge Reino Unido Aportación de la UE Sin datos Dirección Lensfield Road CB2 1EW Cambridge Ver en el mapa Coste total Sin datos