== Reports of technical meeting ORCHIDEE ==

=== 30/09/2010 ===

 * Bug report on interpolation of a 6-hourly climate dataset (see attached file [http://forge.ipsl.jussieu.fr/orchidee/attachment/wiki/TechnicalReports/6_hourly_interpolation.pdf pdf])[[BR]]
   The routine 'forcing_read_interpol' in readdim2.f90 file works fine with climate datasets such as NCEP/NCAR in which:[[BR]]
   * State variables are forecasts valid 6 hours after the reference time[[BR]]
   * Flux variables are  6 hour averages starting at the reference time[[BR]]
   For dataset such as ERA-interim, there are different time lags for state variables and flux variables and a specific problem [[BR]]
   for the interpolation of SWdown. Cédric Bacour already fixed this last bug.[[BR]]
   '''To be done'''
   * To define different flags helping to characterize the temporal structure of a climate dataset: [[BR]]
    Instanteous vs Average variables, Centered vs shifted(+1 timestep) value, GMT vs local-time data
   * To auto-document any Netcdf dataset used by ORCHIDEE with these flags. This will prevent of using datasets without knowing these characteristics
   * To modify the 'forcing_read_interpol' routine in order to account for these flags[[BR]]
    Optional question: How ORCHIDEE interpolates the 6-hourly climate fields for an on-line run (ie coupled model) ?

 * Output variables[[BR]]
   In order to reduce the number of output variables (ie avoid 2 variables for a same physical entity), we (N. Vuichard and M. Mancip) will circulate the ALMA and CMORE standard and the list of output variables that are not in these 2 standards. [[BR]]
   Specific request : 
  * to modify the standard driver for being able to specify as a list, the variables that a user wants as outputs
  * modification of the call to histdef function : loop over the outputs variables stored in a text file (like in viovy's driver)[[BR]]
 * Next technical meeting : '''14th October 2010 10pm''' [[BR]]
   Suggested topics  : 
   1. report of Didier on the externalization
   1. work on the output variables (to continue)

=== 16/09/2010 ===

 * introduction on forge ORCHIDEE wiki : create this page
 * short words from Phillipe on the organization of those meetings
   * every two weeks
   * organized by Martial, supplied by Nicolas Vuichard
   * reports are done during the meeting or just after [[BR]]
     and all participants have to read and perhaps correct the report
 * presentation of work on externalization of parameters (see attached file [http://forge.ipsl.jussieu.fr/orchidee/attachment/wiki/TechnicalReports/Orchidee_meeting_1609.pdf pdf])
   * definition of readding PFTs versus Meta-Classes : discution of idea of Didier versus Sebastiaan. [[BR]]
     We don't keep idea that definition of PFT are in MTC sets (Sebastiaan) [[BR]]
     But for clearing the def file, Nicolas has proposed that we give number of MTC for each PFT per line. Accepted. 
   * simplification of all parameters in code : regroup all constant modules (MTC parameters) in src_parameters and stomate_constants (all participant are agreed ). [[BR]] 
     Discussion on initialization functions [[BR]]
     We have to talk to all ORCHIDEE developpers before this fusion. Two steps[[BR]]
     1. put all STOMATE constant in src_parameter
     1. fusion if needed all constant files.
     Some SAVE values are not parameters and lot of MTC array are SAVE and will be PARAMETER.
   * Possible flags related to the externalization [[BR]]
     1. flag CONFIG_AR5 in order to get back to the AR5 config (13 PFT with default values for all PFT parametes) [[BR]]
     This corresponds to only define nvm=13 and pft_to_mtc = 1 2 3 4 5 6 7 8 9 10 11 12 13  [[BR]]
     We wont' implement the CONFIG_AR5 flag[[BR]]
     1. flag IMPOSE_PARAM : a user has developed a orchidee.def with for instance 16 PFT and has modified some parameter values [[BR]]
     In order to be able to use this .def file but for a run with default values (eg without removing the lines in the .def that redefined the parameter values)[[BR]]
     we set IMPOSE_PARAM to FALSE else we set it to TRUE.
   * All vegetation maps for variable number of PFTs will be land use like maps (result of pre-process in the right number of types). 
 * Spacialization of variables : Didier has asked for a list of spatialization parameters to begin change in the code. [[BR]]
   We decide to begin the work with vcmax_opt. Nicolas Viovy has proposed to build a map by PFTs.[[BR]]
 * Next technical meeting : '''30th September 2010 2pm''' [[BR]]
   Suggested topics (to be confirmed) : 
   1. interpolation of 6-hourly climatology
   1. bug reported by Tea/Pierre on water stress