Studies on Global Redox Carbon Cycle and Periodicity of Some Phenomena in Biosphere (6381)| Chapter 4 | Challenging Issues on Environment and Earth Science Vol. 6

 A global redox carbon cycle model is used to investigate the irregular periodicity of some biosphere events such as climatic cycles, mass extinctions, sudden changes in biodiversity rate, and others over geological time. It is demonstrated that the periodicity of these various natural events is caused by a single cause. Moving lithospheric plates have a periodic impact on photosynthesis via CO2 injections, which is the cause. The oxidation of sedimentary organic matter via thermochemical sulphate reduction from the subduction zone, where plates clash, is the source of CO2. Orogenic cycles are generated by the periodicity and irregularity of lithospheric plate movement, which occur against a backdrop of orogenic cycles. Identify the geological events that occurred in the past. Orogenic cycles occurred until the carbon cycle reached the ecological compensation point, which occurs when the amount of photosynthetically produced carbon equals the amount of reduced carbon oxidised in the Earth's crust's various oxidation processes. Long-term orogenic cycles were replaced by short-term climatic oscillations after this time. The orogenic cycles and climatic oscillations share the same set of characteristics, indicating that they are of the same nature. The only things that have changed are the length of the event and the magnitude of its impact.

Author(s) Details

Dr. Alexander A. Ivlev
Russian State Agrarian University - Moscow Agricultural Academy of Timiryazev, Timiryazevskaya str. 49 Moscow 127550, Russia.

View Book :- https://stm.bookpi.org/CIEES-V6/article/view/2830

1 Carbon Isotopic Data Validate the New Model of Carbon Turnover | Chapter 7 | Challenging Issues on Environment and Earth Science Vol. 2

 It is proposed that a new global redox carbon cycle model be created. It claims that the movement of the lithosphere plates has an effect on photosynthesis growth. Periodic injections of CO2 from plate collision zones are used to create the effect. In subduction zones, carbon dioxide is produced by the oxidation of sedimentary organic carbon during thermochemical sulphate reduction. Carbon turnover is characterised as the transformation of an element from its oxidised state (CO2 + HCO3- + CO32-) to its reduced state (CO2 + HCO3- + CO32-) as a result of photosynthesis and subsequent transformations. The isotopic data back up the model's validity. They clarify why the carbon isotope composition of sedimentary organic matter corresponds with geologic age. The discrepancy between the carbon isotope composition of organic matter and that of coeval carbonates was discovered to be an analogue of the carbon 13C isotope discrimination used by modern plants in photosynthesis. Isotopic periodicity coincides with the periodicity of climatic shifts, mass extinctions, the irregularity of stratigraphic distribution of organic-rich rocks, and other periodic occurrences in the biosphere. The model describes how the evolution of photosynthesis contributed to the accumulation of oxygen in the atmosphere and sedimentary organic matter in the Earth's crust, and how these developments gradually led to an ecological compensation point in the global carbon cycle system. At this point, all of the system's parameters stabilised and started to oscillate around a fixed point.

Author (s) Details

A. A. Ivlev
Russian State Agrarian University of K. A. Timiryazev, Moscow.

View Book :- https://stm.bookpi.org/CIEES-V2/issue/view/60