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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
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The participants of the project
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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

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Example of results from the 100 years simulation
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What has been decided at the Gif workshop?

1. Completion of the first phase of the project

• 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.

2. Preparation of a second phase
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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.
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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 !