![]() Photosynthesis: 6 CO 2 + 6 H 2O + light → C 6H 12O 6 + 6 O 2 Respiration: C 6H 12O 6 + 6 O 2 → 6 CO 2 + 6 H 2O + energy Photosynthesis, and the biological pump, is dependent on the availability of inorganic nutrients and carbon dioxide. Respiration is the reverse process and consumes organic carbon to produce inorganic carbon. Dissolved inorganic carbon in the form of carbon dioxide is fixed into organic carbon is produced through photosynthesis. Biological pump ĭissolved inorganic carbon is a key component of the biological pump, which is defined as the amount of biologically produced organic carbon flux from the upper ocean to the deep ocean. ![]() Sea-air flux of CO 2 and the resulting dissolved inorganic carbon is affected by physical processes such as strong winds and vertical mixing, and the biological processes of photosynthesis, respiration, and decomposition. More than 99% of dissolved inorganic carbon is in the form of bicarbonate and carbonate ions meaning that most of the ocean’s carbon storing ability is due to this chemical reactivity. Therefore, in seawater, dissolved inorganic carbon is commonly referred to as the collection of bicarbonate, carbonate ions, and dissolved carbon dioxide (CO 2, H 2CO 3, HCO − Aqueous carbon dioxide reacts with water to form carbonic acid which is very unstable and will dissociate rapidly into hydronium and bicarbonate.
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