Abstract
The atmosphere-hydrosphere-lithosphere-biosphere at the planetary surface forms a complicated network system where the energy and materials are exchanged with the outer space and the planetary interior. This system is simulated following a concept of chemical plant design. Evolution or secular variation in the planetary state is studied based upon the assumption of dynamic equilibrium.
The following unit process simulaters are developed: EQCOMV, MAGMA, EQCOMS, EQDSTB, CARBON, and SEDSIM. Combining the above processes a synoptic characteristics of the system is discussed. The authors present the hypothesis that the planetary evolution is progressed by the optimum process control under the condition: entropy production rate=minimum.
