References of "Quarterly Journal Of The Royal Meteorological Society"
     in
Bookmark and Share    
Peer Reviewed
See detailTHE MAXIMUM-ENTROPY PRODUCTION PRINCIPLE IN CLIMATE MODELS - APPLICATION TO THE FAINT YOUNG SUN PARADOX
Gérard, Jean-Claude ULg; DELCOURT, D.; François, Louis ULg

in Quarterly Journal Of The Royal Meteorological Society (1990), 116(495), 1123-1132

Current theories of stellar evolution imply that the solar luminosity was 25-30% less than at present during early phases of the Earth's history. The response of the global annual climate to changes of ... [more ▼]

Current theories of stellar evolution imply that the solar luminosity was 25-30% less than at present during early phases of the Earth's history. The response of the global annual climate to changes of the solar input is examined using the maximum entropy production (MEP) principle and a zonal energy balance model including ice-albedo feedback. It is shown that this formulation reproduces satisfactorily the present meridional heat flux and latitudinal temperature distributions. It is found that the model predicts that the efficiency of the meridional heat transport decreases for low values of the solar constant. Consequently, if the solar irradiance is lowered, a progressive development of the polar caps and a decrease of the global surface temperature are obtained without major irreversibility in the system. A comparison with a similar model including diffusive heat transport formalism shows that the value of the critical solar luminosity causing a global glaciation is decreased when the meridional heat fluxes are determined by the MEP principle. [less ▲]

Detailed reference viewed: 41 (2 ULg)