The OCMIP boundary condition for C4MIP is ready. The information is provided
as a self-describing netCDF file (fco2_airtosea_1850-2000.nc). It provides
results on a 2x2 rectangular grid; the first data point is centered at 89S,
1E.  Gridded variables in that file include

* CO2_flux: unmasked mean monthly air-to-sea CO2 fluxes (mol/(m2 * s)) 
  with 1 time-step for each month between January 1850 and December 2000 
  (i.e., 1812 time-steps). The air-sea flux given is that of the median of 
  11 seasonal models from OCMIP-2: CSIRO, IPSL, IPSL.DM1/HOR, LLNL, MIT, 
  MPIM, NCAR, PRINCE, PRINC2, SOC, UL.  Fluxes have already been corrected for 
  sea-ice cover.  For more information contact me or see the protocol document 
  at http://www.ipsl.jussieu.fr/OCMIP/phase2/simulations/Abiotic/HOWTO-Abiotic.html

* mask: land grid points = 0; ocean grid points = 1
  This array is included only for purposes of visualizing the 
  results on the original grid.

IMPORTANT: For the "CO2_flux" array, the land points on the 2 x 2 degree
standard grid have been flooded with adjacent ocean values. Such an approach
will avoid discontinuities at land-sea boundaries during future
interpolation by the coupled modelers (all with different ocean grids).  
After interpolation, coupled modelers should multiply the CO2_flux field on
their grid times their ocean grid's land mask (land=0; ocean=1).  
Climatological sea-ice cover has already been accounted for in the OCMIP-2
model output.

These results can be found (and seen) with the files now available on 
/home/scratch01/orr/C4MIP

 * fco2_airtosea_1850-2000.nc   - netCDF file of OCMIP-2 median air-sea flux
 * fco2_airtosea_1850-2000.gif  - GIF animation with 1 flux map/month
                                  (use gifview or other std. visual. tools)
 * fco2map_1990s.jnl            - Ferret map of mean sea-air flux (1990s) 

Cheers,

James

-- ====================================================================== James Orr Laboratoire des Sciences du Climat et de l'Environnement Unite Mixte de Recherche CEA-CNRS LSCE, CEA Saclay http://www.ipsl.jussieu.fr/~jomce Bat. 709 - Orme mailto: orr@cea.fr F-91191 Gif-sur-Yvette Cedex Phone: (33) (0)1 69 08 77 23 FRANCE Fax: (33) (0)1 69 08 77 16 ======================================================================