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RETRO Modelling Activities

RETRO Modelling Activities. RETRO is a 5 th framework EU program with 12 partners (MPI-M, CNRS, KNMI, UiO, UCamb, ISA, FMI, ETH-Z, TNO, MPI-BGC, NILU, UBremen) Main Objective: “ Reanalysis of the tropospheric chemical composition over the past 40 years ”

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RETRO Modelling Activities

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  1. RETRO Modelling Activities • RETRO is a 5th framework EU program with 12 partners(MPI-M, CNRS, KNMI, UiO, UCamb, ISA, FMI, ETH-Z, TNO, MPI-BGC, NILU, UBremen) • Main Objective: “Reanalysis of the tropospheric chemical composition over the past 40 years” • Approach: Develop emission data sets, stratospheric boundary conditions and use several models to simulate 1960-2000 using ERA-40 meteorology • Heritage and links: several previous and ongoing EU projectsPOET, TRADEOFF, TROTREP, MOZAIC, GMES • Project Duration: Jan. 2003 – Dec. 2005

  2. Work Package Structure • WP1: Emissions – focus on anthropogenic emissions and biomass burning • WP2: Data sets – collect data sets from 1960s-1980s, prepare data sets for model validation, extend NILU data base • WP3: Sensitivity studies and evaluation – model-data intercomparison, attribution experiments • WP4: Long-term simulations – prepare meteorological data and models, run and evaluate simulations • WP5: Policy and Implications – scenarios, radiative forcing, assessment of uncertainties

  3. Europe Southern China POET Heritage (trends) GOME Observations Model Results courtesy U. Niemeier, C. Granier, A. Richter

  4. Emissions (Biomass Burning) GWEM Emission Model Global Burned Areas from AVHRR 1980-2000 J. Hoelzemann et al. (JGR, 2004) Reg-FIRM fire model J. Pereira et al. … also cleaned ATSR fire count data set (1996-2001) A. Spessa et al.

  5. Emissions (fossil fuel) NOx emission trend Time patterns Web-based interface GOME LOTOS T. Pulles, R. Brand, M. van Het Bolscher GOME analysis S. Beirle

  6. MOZAIC O3, relative to tropopause Ozone sondes A. Volz-Thomas et al. C. Schnadt et al. Data-Model Comparisons • investigating: • model bias • seasonal amplitude and phase shift • variability (standard deviation) • correlation

  7. Preparing 40-year simulations • Use of ERA-40 meteorology • Variability of stratospheric boundary (from Fin-ROSE) • Emission trends expected output: ~1 TByte per model

  8. Using ERA-40 meteorology SPRING SUMMER ERA-40 GCM S. Rast and M. Schultz

  9. Using ERA-40 meteorology 100-hPa flux drops to 716/761 Tg/yr (6o x 4o/3o x 2o) ‘cross-tropopause’ flux to 629/663 Tg/yr P. van Velthoven, T. van Noije et al.

  10. Link to ACCENT • Several RETRO partners participate in ACCENT • RETRO emissions and model results will be made available at the end of the project • RETRO model intercomparison and model-data comparison is open to community – standardisation of tools (model QA) • Collection of old measurements and extended observational data base

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