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Workshop “Atmospheric monitoring and inverse modelling for verification of national and EU bottom-up GHG inventories” - reportWorkshop "Atmospheric monitoring and inverse modelling for verification of national and EU bottomupGHG inventories " - reportGeolandJean-Christophe CalvetMétéo-France, Toulouse, FranceThe GEOLAND projectGEOLAND is carried out in the context of Global Monitoring of Environment andSecurity (GMES), a joint initiative of European Commission (EC) and EuropeanSpace Agency (ESA), which aims to build up a European capacity for GMES.GEOLAND is designed to fundamentally support this initiative, focusing on the GMESpriorities "Land Cover Change in Europe", "Environmental Stress in Europe", and"Global Vegetation Monitoring". In FP6, the GEOLAND integrated project started in2004 and the technical work was completed in December 2006.The ambition of the GEOLAND consortium is to develop and demonstrate a range ofreliable, affordable and cost efficient European geo-information services, supportingthe implementation of European directives and their national implementation, as wellas European and International policies. Thus, the GMES initiative is considered aunique opportunity to integrate existing technology with innovative and scientificallysound elements into sustainable services.The Land Carbon component of GEOLANDThe objective of the land carbon component of GEOLAND is to develop a bottom-up(Fig. 1) multimodel carbon accounting system accounting for weather and climatevariability, coupled with an Earth Observation (EO) data assimilation system. Thisnew tool will support Kyoto (and post-Kyoto) reporting activities.The main achievement so far (Fig. 2) consisted in performing the 'greening' of theland surface operational platforms of meteorological services (ECMWF and Météo-France). Namely, a CO 2 responsive capability was introduced in the land surfacemodels and the possibility to simulate the vegetation biomass and leaf area index.ECMWF is now ready to simulate the terrestrial carbon flux at a global scale with aspatial resolution of 25 km. The modelled carbon flux is fully consistent with themodelled water flux, soil moisture, vegetation biomass and leaf area index.A demonstration EO data assimilation system was implemented over southwesternFrance (Fig. 3), and a simplified version was successfully applied at a global scale.ProspectsFuture activities will focus on the representation of carbon storage and soilrespiration in the modelling platforms of meteorological services, on the developmentof the operational use of EO data assimilation, on the improvement of the spatialresolution over Europe (1-10 km), and on linking the products with forest and soilcarbon inventory activities in Europe.38