1. Output type and frequency

The output frequency will be the same over the entire length of the simulation. For both 2-D and 3-D biogeochemical and physical variables, model groups will provide monthly mean output fields (12 records per year).

1. Physical
   • [ 3-D ] Potential Temperature [ C ] , Salinity [psu ], potential density [ kg/m^3 ], the three components of velocity [ m/s ] , and if the parameterization is used, of bolus velocity, the vertical diffusivity coefficient [ m^2/s ] .
   • [ 2-D ] Total heat flux [ W/m^2 ], Shortwave heat flux [ W/m^2 ], E-P [ mm/day ], mixed layer depth defined by the 0.01 density difference criterion [ m ], SST [ C ], SSS [ psu ], sea ice concentration, and SSH [ m ] . If SSH is not a prognostic variable, it should be diagnosed from the pressure gradient.
2. Biogeochemical
   • [ 3-D ] All 3-D prognostic tracers should be provided [mol/m^3 ] . Since the total number of these variables differ between the different models, we do not give a precise list here. In addition to the tracers, participants should provide total primary production [ mol C/m^3/s ] , export production by sinking particles [ mol C/m^2/s ] . If available, new production [mol C/m^3/s ] , biogenic silica production [ mol Si/m^3/s ] , export of biogenic silica [ mol Si/m^2/s ] and of CaCO3 [ mol C/m^2/s ] will be given.
   • [ 2-D ] Surface concentrations of all the tracers [mol/m^3 ] , vertically integrated primary production [ mol C/m^2/s ] , export production by sinking particles at 100m [ mol C/m^2/s ] , surface pCOn2 [ uatm ] , dpCO2 (pCO2surf - pCO2atm) [ uatm ] , air-to-sea CO2 flux [mol/m^2/s ] , air-to-sea O2 flux [ mol C/m^2/s ] . If available, participants should also provide vertically integrated biogenic silica production [ mol Si/m^2/s ] , biogenic iron production [ mol Fe/m^2/s ] , and CaCO3 production [ mol C/m^2/s ] .