THE ROLE OF BIOSPHERE IN THE FORMATION OF PLANETARY CLIMATE: GREENHOUSE CATASTROPHE

摘要

If take into consideration the role of planet atmospheres in a climate formation, the habitable zone around a star system would be more wide than it is supposed now. Reflection of the incident radiation (reflectance) and greenhouse effect is significantly changes the planet temperature. As a result of slow accumulation of greenhouse gases in the atmosphere the planet global temperature will increase from minimum values to hundred degrees Celsius. Thus, on a certain stage of evolution the planetary environments of the planets placed at a wide range distances from the central star may be fit to origin of life. Originating at the time of the favorable climatic conditions, the photosynthetic life stabilizes later the global temperature of the planet absorbing atmospheric CO_2 in to the nonequilibrium lithospheric buffer. Civilization may disturb the biospheric stabilization mechanisms of the atmospheric and lithospheric nonequilibrium state, that will cause irreversible transition of climate system in a equilibrium state which is accompanied by the significant increase of the planet surface temperature and concentration of the atmospheric greenhouse gazes. This irreversible transition, which able to eliminate life on the planet, is named "Greenhouse catastrophe".