Table 2.

Conditions of the Earth system close to and far from a state of planetary thermodynamic equilibrium. Adapted from Kleidon (2009a).

property or fluxclose to equilibriumfar from equilibrium
frictional dissipationnonehigh
relative humiditysaturatedlow
cloud coverhighlow
net evaporation0high
net precipitation0high
continental runoff0high
geochemical cyclingnonehigh
atmospheric CO2highlow
greenhouse effecthighlow
surface temperaturehighlow
ice cover0polar, seasonal
absorption of solar radiationlowhigh
planetary entropy productionlowhigh
conditions for lifelowhigh