(A) Photosynthesis in land plants fixes atmospheric CO2 (inorganic carbon) as organic carbon, which is either stored as plant biomass or in soil, or is decomposed back to CO2 through plant and ...

This is Earth's major inorganic carbon cycle, and it shifts Earth's atmospheric CO 2 over time scales of millions of years. But as the sun gets 10 percent brighter every billion years, it ...

Of this amount, nearly 80% (2500 GT) is found in soil (Lal 2008). Soil carbon can be either organic (1550 GT) or inorganic carbon (950 GT). The latter consists of elemental carbon and carbonate ...

The IAEA Environment Laboratories apply nuclear and isotopic techniques to better understand the carbon cycle, to evaluate the ocean’s ... where it is recycled back into inorganic carbon and stored, ...