1. The PILPS-C1 experiment update Reminder on the project: Comparison of both « biophysical » and « biogeochemical » flux from Different types of models with observations at one EUROFLUX site: Loobos (coniferous forest). Simulation proposed: -« equilibrium »: models are run until equilibrium With the two years of forcing -« 100 years runs » models run the whole period of The plantation (100 year) knowing that there was no carbon at the beginning -« free runs »: no information on site is provided (except soil characteristics) -« constrained runs »: ancillary data are provided To calibrate the models  4 simulations possible

2. The participants of the project

3. What has been done last year « free runs » (both equilibrium and 100 years) Example of results from the equilibrium runs: Index of agreement for all models

4. CLASS-MCMCLASS-UA ORCHIDEE-1ORCHIDEE-2 SWAP IBIS Annual NEE (Kg C m-2 y-1) MC AVIM CLASS-MCMCLASS-UA ORCHIDEE-1ORCHIDEE-2 IBIS Annual GPP (Kg C m-2 y-1) Example of results from the 100 years simulation

5. What has been decided at the Gif workshop? Complete the simulations set with constrained runs. Redaction of 2 papers with all the participants have been scheduled: 1/ First with the equilibrium runs that include Models with and without carbon: 2/ Second with the 100 years simulation. 1.Completion of the first phase of the project 2. Preparation of a second phase

6. What have been done this year Ancillary data from the site was collected and given to participants Completion of simulations for “constrained” run with calibrated are now available Most of the participant. The analysis of these new simulation will begin soon Hope to have a first draft of the first paper by the end of the year. For next year: Hope to have the submission of the two papers.

7. The future of PILPS Carbon As it was decided at Tucson last year, decision for a second phase of the project will be done after completion of the first phase.. So probably at the next panel meeting ? What have been proposed: Extend the study to more site which include different vvegetation types (more than 30 sites available) How the inter-biomes variability compare with the inter-models variability ? What biomes are correctly/not correctly simulated ?. It will be very interesting to include year 2003 available for most of European sites with the extreme drought of The European summer: -Test of model response to high hydric stress and high Temperature (in particular biomes show very different responses) -Seems to be a good way to test how models simulate vegetation response to climate similar to those expected by the end of the century !