Hypotheses and postulates of the model of global carbon cycle evolution

The key idea of the global carbon cycle model is that carbon turnover can be described as a transition of the oxidized state presented by carbon species from natural "carbon dioxide -carbonate" system into the reduced state by means of photosynthesis, and reverse transition through oxidation of sedimentary organic matter in the thermochemical sulfate reduction. Energy for the first transition is provided by the sun, energy for reverse transition is provided through collisions of moving lithospheric plates. The movement of lithospheric plates, as postulated, occurs under the control of gravitational interaction of the Earth and celestial bodies affecting convection streams in magma. As a result, lithospheric plates movement is irregular and consists of short-term orogenic period and long-term geosynclynal period, which form orogenic cycles. In short-term orogenic period CO2, produced in organic matter oxidation, rises onto the Earth's surface, filling the atmosphere and hydrosphere and initiating photosynthesis. Photosynthesis develops in the next geosynclinal period, as a result of which the content of CO2 falls, and oxygen increases. This causes cooling on the Earth, ending in glaciations by the end of the cycle. Photosynthesis provides climatic changes and biotic turnover. Due to participation of global photosynthesis in global carbon cycle, manifested in the form of the integrated assimilation and photorespiration functions of all photosynthetic organisms living at the moment and in the past on the Earth, including those whose biomass was used in food chains, as well as due to the increased oxygenation of the environment, the global carbon cycle evolution and spontaneous movement of the cycle towards ecological compensation point occurred. At this point, the global carbon cycle system became stationary. It was characterized by the fact that the key parameters of the system, such as the content of carbon dioxide and oxygen in the atmosphere and hydrosphere, the content of sedimentary organic matter in the Earth's crust, sea level fluctuations and other related parameters became stable and began to oscillate around the certain average values. The interdependence and interconditionality of the parameters of the global carbon cycle system in a stationary state requires continuous monitoring of the fluctuations of numerous vital parameters, so that they do not exceed the permissible limits that meet acceptable human habitation conditions.