How long does it take for the oceans and terrestrial biosphere to take up carbon after it is burned?

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Studies Neha Sharma 1 year 1 Answer 163 views Silver 0

Answer ( 1 )

  1. Inorganic carbon is readily exchanged between the atmosphere and ocean, exerting an important control on the pH of ocean water. Carbon is released to the atmosphere at oceanic upwelling sites, whereas regions of downwelling transfer carbon from the atmosphere to the ocean. When carbon (CO2) enters the ocean, carbonic acid is formed by the reaction: CO2 + H2O = H2CO3. Carbonic acid dissociates to form bicarbonate ions (HCO3-), the form in which most of the carbon in the oceans exists; lesser amounts of carbon exist as carbonic acid (H2CO3 or dissolved CO2), and carbonate ions (CO32-) paired with calcium and magnesium and other cations. Marine organisms build their skeletons and shells out of the minerals calcite and aragonite (CaCO3) through the incorporation of bicarbonate ions. These minerals dissolve after the death of the organism, but some of the material settles to the sea floor where it can be buried and stored in the form of limestone.

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