Table 1.

Compilation of soil surface CO2 fluxes.

EcosystemSoil Ordermax Jo*min Jomax S(z) (ppmV)min S(z) (ppmV)Ref.
temperate grasslandVertisol55.53.525,7001,620(19)
temperate grasslandMollisol26.16.312,1002,920(20)
temperate grasslandMollisol57.63.626,7001,670(21)
temperate grasslandMollisol20.04.29,3001,940(22)
temperate grasslandInceptisol slightly calcareous28.83.613,3001,670(23)
tropical grasslandalluvial soil29.24.613,5002,130(24)
tropical grasslandOxisol13.56.56,2003,010(25)
tropical forestOxisol3.51.73,2001,560(26)
tropical forestOxisol11.01.510,1001,380(27)
  • *Jo is the soil surface CO2 flux in mmol/m2/hr

  • Minimum summer values are shown for the temperate grasslands; minimum annual values are shown for tropical soils