Fluxes
Anthropogenic carbon emissions (fossil fuel, cement etc., including their history)
Ecosystem-related carbon fluxes (measured at flux measurement sites, or derived from inventories of forest or agricultural yields)
Stocks and spatially comprehensive observations
Stocks of mobile carbon in the Earth System (for these, observations of present status is equally important as a comprehensive reconstruction of past changes)
Atmospheric chemistry (pCO2, O2/N2, CH4, other trace gases)
Terrestrial carbon pools, stratified by above- and belowground, and short-, medium- and long-lifespan pools (available from measurements at irregularly spaced points or inventory areas only, needs to include ancillary data such as present ecosystem structure, history of land use and natural disturbance, climate and soils)
Land surface parameters (fPAR, LAI etc.) including phenology-dependent temporal dynamics
Freshwater ecosystem and ocean biogeochemistry parameters
Forcings
Climate, ocean circulation fields, soils, topography etc. (at compatible spatial and temporal resolutions with the above)
Land use
Deposition of atmospheric pollutants.
