give a sketch of Global carbon cycle diagram.. fast......
Answers
The global carbon cycle describes the complex transformations and fluxes of carbon between the major components of the Earth system. Carbon is stored in four major Earth reservoirs, including the atmosphere, lithosphere, biosphere, and hydrosphere. Each reservoir contains a variety of organic and inorganic carbon compounds ranging in amounts. In addition, the exchange and storage times for each carbon reservoir can vary from a few years to millions of years. For example, the lithosphere contains the largest amount of carbon (1023 g C), buried in sedimentary rocks in the form of carbonate minerals (CaCO3, CaMgCO3, and FeCO3) and organic compounds such as oil, natural gas, and coal (fossil fuels). Carbon in the lithosphere is redistributed to other carbon reservoirs on timescales of millions of years by slow geological processes such as chemical weathering and sedimentation. Thus, the lithosphere is considered to be a relatively inactive component of the global carbon cycle (though the fossil fuels are now being added to the biologically active reservoirs at unnaturally high rates). The Earth’s active carbon reservoirs contain approximately 43×1018 g of carbon, which is partitioned between the atmosphere (750×1015 g C), the terrestrial biosphere (2190×1015 g C), and the ocean (39 973×1015 g C; Figure 1). While the absolute sum of carbon found in the active reservoirs is maintained in near steady state by slow geological processes, more rapid biogeochemical processes drive the redistribution of carbon among the active reservoirs.
