1. WP 5: Status and plans Hymn Brussels 23.05 2007

3. 1.Start off with with test run for year 2004 using existing emissions. UiO started last week (tropospheric model version) TM5 a couple of techincal problems to solve LMDZ ? Evaluation of the simulations: Comparison FTIR, satellite, NOAA ESRL Model output suggested in e-mails from Stig Dalsøren Feb and May 2007. 2. Assess the dry deposition scheme in the models and adapt it to LPJ output (first year). Communication on e-mail and meeting between KNMI and Rita Wania in April. Discussion yesterday 3. Long term simulations (start month 27): KNMI (trop+strat); UiO (trop+strat); LMDZ (?). Period:1980-2000 LMDZ and TM5 using ERA40 met data 1999-2007 UiO using IFS met data What about TM5 and LMDZ after year 2000? Problem after year 2000 no global anthropogenic emission inventory available How to handle fluxes/emissions of longlived components as methane and N 2 O?

4. 4. Evaluation and analysis: Analysis: - Trends - But also: What are the important scientific questions for the HYMN species during the period? Should probably put emphasis on some key issues. Evaluation: Surface measurements (NOAA, ALEGAGE); FTIR, SCIAMACHY (IASI). One step further: How can the information from both measurements and models be used to increase the understanding of some of the key issues. 5. Sensitivity simulations: Impact of CH4 from vegetation (suggested last meeting) Change in N 2 O (NOx) emissions due to introduction of biofuel (Crutzen2007) ? Others to be defined 6. Future simulation: 2030 (last year of the project). UiO only model to do this. Could/should be cooridnated with EUROHYDROS project. EUROHYDROS not yet defined future emission scenario and simulations. 7. Extend the simulations to 2008 (FTIR and IASI) ?