November 2008 Philippe Keckhut Service d’Aéronomie/IPSL P. Ciais, C. Textor, M. Logan, CEA/LSCE, F ; E. G. Nisbet, RHUL, UK ; B. Buchmann, J. Klausen, Empa, CH; G. de Leeuw, UHEL, Finland ; M. De Mazière, BIRA-IASB, B ; M. Schulz, P. Rayner, CEA/LSCE, F ; S. Godin-Beekmann, SA, F ; K. Torseth, NILU, NO & GEOmon partners Global Earth Observation and Monitoring GEOMON

November 2008 Scientific Questions regional European trendsWhat are the regional European trends and variability of atmospheric composition in relation to changes in surface emissions? validate and integrate satellite observationsHow to validate and integrate satellite observations with ground-based and airborne observations to obtain a coherent picture? global trends of atmospheric compositionreduce the uncertaintiesWhat are the global trends of atmospheric composition and how to reduce the uncertainties of surface emissions and atmospheric processes?

November 2008 GEOMON : GEOSS atmosphere GEOmon is a prototype for a European contribution to GEOSS

November 2008 GEO and GEOSS… GEO is an Intergovernmental Organization –65 Nations –European Commission –43 Participating Organizations With a simple objective: To establish a global, coordinated, comprehensive and sustained system of Earth observing systems, GEOSS Courtesy Dr. Brendan Kelly GEO Sec.

November 2008 Operational system for climate?

November 2008 But also…. Satellites have a limited lifetime Successive satellites need inter-calibration even with similar experiment onboard Ground-based network are required Ground-based instruments are supposed to be supported by national agencies. Few ideas of consolidate costs : –Lidar profile: 1 k€ –Ozonesonde: 2 k€ –Spectrometers k€ Ground-based networks are not operational yet Becoming operational has a larger cost

November 2008 GEOMON Objectives Build an integrated pan-European atmospheric observing system of greenhouse gases, reactive gases, aerosols, and stratospheric ozone. Quantify and understand the ongoing changes of the atmospheric composition Integrate ground-based and satellite observations

November 2008 Act 6: Data dissemination GEOmon Data Center Outreach User Interfaces Projects Organizations Policy Act3: Aerosols & Climate Act2: Reactive Gases & Pollutants Act1: Greenhouse Gases Act4: Stratospheric Ozone Act5: Modeling and Integration Surface & profile in-situ observations Surface, profile, column remote sensing observations Integration & Harmonization Modeling Selecting representative sites Processing & Trend Analysis GEOmon Project structure

November 2008 High towers Surface observatories Flask sampling sites Activity 1 - Greenhouse gases Observations: In situ monitoring of CO2 and CH4 Airborne measurements of global distributions of CO2 and CH4 Solar (near-infrared) Fourier Transform Infrared spectrometers across Europe Products Near Real time greenhouse gas in situ data Integrated CO2 and CH4 global products combining atmospheric assimilation models, ground based data and remote sensing fields, in linkage with existing modelling projects Assess potential of satellite observations for constraining European sources of CH4 and CO2 Air-borne sampling

November 2008 Network of networks of surface reactive gases measurementsNetwork of networks of surface reactive gases measurements Quality assured, harmonized, and regionally representative data sets in the European boundary-layer using long-term surface observations. - Airborne monitoring of the free troposphereAirborne monitoring of the free troposphere Provide quality assured and integrated chemical composition measurements of the global free troposphere, with focus on O3 and CO from CARIBIC. Network of ground-based remote sensing measurements for satellite validationNetwork of ground-based remote sensing measurements for satellite validation Link data from ground-based remote sensing networks and passenger aircraft programs to satellite measurements, in synergy with model studies. Activity 2 - Pollutants & Climat Key species: CO, O 3, NO 2

November 2008 Activity 3 - Aerosols and Climate Harmonize and quality-check dataHarmonize and quality-check data from ground- based in-situ and remote sensing measurements European Network of Aerosol Observation NetworksCreate of the European Network of Aerosol Observation Networks (ENAN) data base, complementary to satellite data. 4-D aerosol distributionAssess the 4-D aerosol distribution over Europe using ENAN

November 2008 Activity 4 - Stratospheric O 3 & Climate monitoringContinued monitoring of O 3, NO 2, BrO, Cl y /F y, T, H 2 O, aerosol/PSC from ground (NDACC) and space time seriesHomogenisation and consistency of time series links O 3 climateIdentify links between stratospheric O 3 and climate changes. Insure satellite continuity

November 2008 Integration & Modeling Studies integrated data productsDevelop integrated data products combining assimilation model results, ground-based data and remote sensing fields satellite retrievalsImprove satellite retrievals long-term trendsAnalyze long-term trends in existing model results and check consistency with trends in observations budgetsConstrain budgets EvaluatemodelsEvaluate global & regional models with GEOMON data Optimize measurement networksOptimize measurement networks through comparisons between observed and modeled tracer distributions

November 2008 Geomon satellite remote sensing list

November 2008 Europeen atmospheric data Lot of Networks local->national->international Networks with real added values Similar data include in different networks Similar data generated for different purposes Different data policies Different qualities Acces difficult No unique catalog, format, metadata Many initiatives (Projects, agencies)

November 2008 Towards a “one-stop shop” for European atmospheric composition observations Existing databases have a large added value: Quality check Share technology & methodology improvements insure network homogeneity International connections

November 2008 Towards a “one-stop shop”: common GEOMON Data Centre Towards a “one-stop shop”: Establish a common GEOMON Data Centre for atmospheric composition parameters, including near-real time data products - Virtual data base at NILU Common search facilities for and acess to : GEOmon-funded data External data National & international databases of past and ongoing scientific projects, and other relevant activities - Tools for data viewing and description GEOMON Data Centre

November 2008 Conclusions GEOmon is a prototype for a European contribution to GEOSS GEOMON will developed a “one-stop shop” for European atmospheric composition observations GEOMON data center will be a virtual data base, a portal towards existing data bases Inter-operability and metadata are big issues Models contribute to better evaluate measurement distributions Cost for operational ground-based network need to be found