We use the simulation results generated using from the IPSL "Earth system model"
(Braconnot et al, 2006) for external ocean surface forcing.
The IPSL-CM4 version of the model couples four components of the Earth system.
LMDZ is the component for atmospheric dynamics and physics. 
ORCA is the component for ocean dynamics. LIM is the component for sea-ice dynamics
and thermodynamics. ORCHIDEE handles the land surface.

The atmospheric parameters needed to force the NEMO (Nucleus for European Modelling of 
the Ocean) are zonal and meridional wind components at 10m above the surface, 
temperature and specific humidity at 2m above the surface,
snow falling and precipitation rates, downwelling shortwave and longwave at the surface.
Daily and monthly values of the parameters are avaialble for the following simulations 
on a 96 x 71 longitude-latitude grid.

"2L20" is a control simulation with concentration of the different trace gazes
prescribed to modern trace gazes concentration (1840-2409).

"2L24" is a pre-industrial simulation with trace gazes concentration
prescribed to pre-industrial values (circa 1750) (1931-2080).

"2L23" is a CMIP simulation with 1% increase in the CO2 concentration
until quadrupling CO2 is reached (1931-2080).

"2L23B" is an additional stabilization scenarios with 2xCO2 
starting from the CMIP run when the corresponding level of CO2 is reached (1931-2080).

"2L26" and "2L27" are Scenarios A2 and A1B respectively for 2000-2100.

"2L28" and "2L31" are Scenarios B1 for 2000-2100.

The full set of IPCC simulations performed at IPSL are described 
at http://mc2.ipsl.jussieu.fr/simules.html.