Obiettivo Problems to be solvedThere are still discrepancies between model prediction and observations of the year- round stratospheric ozone decline in mid and high latitudes. In summer, current models still severely overestimate ozone in the polar regions, and this appears as a major deficiency in our ability to model the complete ozone seasonal cycle. The springtime mid-latitude ozone depletion has not been satisfactorily modelled in a quantitative manner. This proposal hence aims at improving our understanding and modelling of ozone loss processes throughout spring and summer, in the northern mid and high latitudes.Scientific objectives and approachThe main scientific objective is to acquire a quantitative understanding of:(i) the mid-latitude ozone depletion accompanying the breakdown of the wintertime polar vortex, especially over Europe, andii) the Arctic summer ozone deficit and its linkage to midlatitudes.The project relies on using an integrated approach combining ground-based and balloon-borne measurements, global satellite observations, as well as advanced chemical/dynamical modelling and data assimilation. Measurements of ozone, inert gases, or species actively involved in ozone chemistry, are made at three different stations in the Arctic throughout spring and summer. Observational techniques comprise ground-based lidar and infrared spectroscopic measurements, and lightweight balloon-borne instrumentation. Satellite observations complement these local, ground-based and in-site measurements by allowing characterising the global, evolving three-dimensional ozone distribution. The satellite data are globally integrated into a transport model through data assimilation. State-of-the-art numerical models are used to investigate the interaction of chemistry and mixing in the spring and summer stratosphere. These models are used to diagnose the ozone loss mechanisms and the overall transport of trace species in spring and summer. Correlative studies of the abundance of various trace species, either modelled or measured, allow to disentangle the effect of mixing from chemical sources and sinks.Expected impactsThe information to be provided by the field campaigns and model studies during SAMMOA will improve the quantification of ozone loss in the stratosphere, a key science priority in support of the Montreal protocol. This project will particularly impact on understanding of ozone depletion in spring and summer, when it is most harmful. It is indeed in the summertime, that human exposure to UV radiation is largest in middle latitudes. Modelling improvements shall result in better assessment and prediction of the ozone trend and recovery in support of regulatory protocols. Campo scientifico natural sciencesearth and related environmental sciencesatmospheric sciencesengineering and technologymechanical engineeringvehicle engineeringaerospace engineeringsatellite technologynatural sciencesearth and related environmental sciencesenvironmental sciencesozone depletion Programma(i) FP5-EESD - Programme for research, technological development and demonstration on "Energy, environment and sustainable development, 1998-2002" Argomento(i) 1.1.4.-2. - Key action Global Change, Climate and Biodiversity Invito a presentare proposte Data not available Meccanismo di finanziamento CSC - Cost-sharing contracts Coordinatore NORWEGIAN INSTITUTE FOR AIR RESEARCH Contributo UE Nessun dato Indirizzo Instituttveien 18 2027 KJELLER Norvegia Mostra sulla mappa Costo totale Nessun dato Partecipanti (9) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto ALFRED WEGENER INSTITUTE FOR POLAR AND MARINE RESEARCH Germania Contributo UE Nessun dato Indirizzo Telegraphenberg 43 A 14473 GROSS GLIENICKE POTSDAM Mostra sulla mappa Costo totale Nessun dato DANISH METEOROLOGICAL INSTITUTE Danimarca Contributo UE Nessun dato Indirizzo 100,Lyngbyvej 100 2100 KOEPENHAGEN Mostra sulla mappa Costo totale Nessun dato FORSCHUNGSZENTRUM JUELICH GMBH Germania Contributo UE Nessun dato Indirizzo Leo-Brandt-Strasse 52425 JUELICH Mostra sulla mappa Costo totale Nessun dato ROYAL NETHERLANDS METEOROLOGICAL INSTITUTE Paesi Bassi Contributo UE Nessun dato Indirizzo 10,Wilhelminalaan 10 3730 AE DE BILT Mostra sulla mappa Costo totale Nessun dato SWEDISH INSTITUTE OF SPACE PHYSICS Svezia Contributo UE Nessun dato Indirizzo 981 28 KIRUNA Mostra sulla mappa Costo totale Nessun dato SWEDISH SPACE CORPORATION Svezia Contributo UE Nessun dato Indirizzo 981 28 KIRUNA Mostra sulla mappa Costo totale Nessun dato THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD Regno Unito Contributo UE Nessun dato Indirizzo Keble Road 1- Denys Wilkinson Building OX1 3RH OXFORD Mostra sulla mappa Costo totale Nessun dato UNIVERSITY OF LEEDS Regno Unito Contributo UE Nessun dato Indirizzo .,Woodhouse Lane LS2 9JT LEEDS Mostra sulla mappa Costo totale Nessun dato University of Cambridge Regno Unito Contributo UE Nessun dato Indirizzo Lensfield Road CB2 1EW Cambridge Mostra sulla mappa Costo totale Nessun dato