Objetivo Problems to be solvedTropospheric ozone has a dual role with respect to climatic changes. Ozone is itself a greenhouse gas and it also plays a key role in the production of the hydroxyl radical (OH), which controls the lifetime of many climatically important tropospheric gases. Tropospheric ozone and OH are produced as a result of photochemical processes, through reactions involving ozone precursors. The proposed project is defined in order to answer three main questions:first, can the surface emissions of ozone precursors, and their variability be accurately quantified?Second, how should the current observations of chemical species be optimally coupled with chemistry-transport models (CTMs) to quantify the global budgets of ozone precursors and ozone?Third, how do future changes in surface emissions and proposed future scenarios influence the lifetime of greenhouse gases and ozone distribution?The project will provide a quantitative basis for emissions, distributions and evolution of chemical tropospheric species for discussions related to policies aimed at improving the quality of air or at reduction of greenhouse species anthropogenic emissions.Scientific objectives and approachThe overall objective of the project is to quantify accurately the budget of ozone precursors using a combination of observations and state of the art CTM. The retrieval methods to derive accurately the tropospheric burdens of CO, CH4, NO2 and ozone from observations provided by the IMG/ADEOS and GOME instruments will be improved. High-resolution inventories of emissions for ozone precursors will be developed. The ability of several European CTMs to reproduce current distributions will be assessed, through detailed comparisons between model results and observations. The impact of changes in ozone precursors on the tropospheric oxidising capacity and on the distribution of ozone will be quantified. The relative importance of anthropogenic versus natural emissions in the ozone production will be quantified. The inverse modelling approach for quantifying surface emissions will be further developed. These developments will yield an assessment of the accuracy of current inventories. The impact of emission mitigation policies on the distributions of methane and ozone will be quantified.Expected impactsThe proposed project addresses issues that are central to our understanding of the causes of large-scale air pollution and climate change, and will provide a quantitative basis for reducing the environmental and climatic impact of human activities. The new tools and databases we will develop will aid the understanding of changes in the composition of the atmosphere and their consequences. The emissions distributions we will optimise could be used as a starting point for discussions on emissions reduction policies. The inverse modelling methodology developed within the project will be available for the optimisation and verification of surface emissions of other chemical species for which measurements will be available in the future. The project will allow a better knowledge of the behaviour of ozone precursors and ozone, and yield a quantitative understanding of the importance of the processes that determine their budgets and their evolution. This represents an important step in reducing uncertainties about the impact of changes in ozone precursors on the concentration of ozone, which is important for policy makers to decide upon efficient options for future mitigation policies. The project will therefore provide an important reference for the evaluation of future global trends using the existing and future satellite observations. Ámbito científico natural sciencescomputer and information sciencesdatabasesnatural sciencesearth and related environmental sciencesenvironmental sciencespollutionnatural scienceschemical sciencesorganic chemistryaliphatic compoundsnatural 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 10-12,Boulevard Vauban, 47 78047 GUYANCOURT Francia Ver en el mapa Coste total Sin datos Participantes (9) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo BELGIAN INSTITUTE FOR SPACE AERONOMY Bélgica Aportación de la UE Sin datos Dirección 3,Ringlaan 3 1180 BRUXELLES Ver en el mapa Coste total Sin datos Business Unit of TNO Built Environment and Geosciences Países Bajos Aportación de la UE Sin datos Dirección Van Mourik Broekmanweg 6 2628 XE DELFT Ver en el mapa Enlaces Sitio web Opens in new window Coste total Sin datos MAX-PLANCK-GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN E.V. Alemania Aportación de la UE Sin datos Dirección 55020 MAINZ Ver en el mapa Coste total Sin datos NATIONAL INSTITUTE OF PUBLIC HEALTH AND ENVIRONMENT Países Bajos Aportación de la UE Sin datos Dirección 9,Antonie van Leeuwenhoeklaan 9 3720 BA BILTHOVEN Ver en el mapa Coste total Sin datos NORWEGIAN INSTITUTE FOR AIR RESEARCH Noruega Aportación de la UE Sin datos Dirección Instituttveien 18 2027 KJELLER Ver en el mapa Coste total Sin datos PSB, ANALYSE, ONTWERP & BOUW INFORMATIESYSTEMEN BV Países Bajos Aportación de la UE Sin datos Dirección Haaksbergweg 45 1101 BR AMSTERDAM Ver en el mapa Coste total Sin datos UNIVERSITAET BREMEN Alemania Aportación de la UE Sin datos Dirección .,Otto-Hahn-Allee 28334 BREMEN Ver en el mapa Coste total Sin datos UNIVERSITY OF OSLO Noruega Aportación de la UE Sin datos Dirección Moltke Moes Vei 31 0315 OSLO 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
