Interhemispheric Transport of Carbon Through the Ocean
A case is made that the Atlantic’s conveyor circulation carries roughly 0.6 gigatons of carbon (as ΣCO2) from the northern to the southern hemisphere. The return transport of this carbon (as CO2) through the atmosphere would maintain a 1.6 ppm south to north gradient in atmospheric CO2 content. Such a gradient would go a long way toward explaining the current lower than expected fossil fuel CO2 supported north to south atmospheric gradient and hence would alleviate the necessity for the large northern hemisphere terrestrial sink proposed by Tans et al., 1990.
KeywordsSouthern Hemisphere North Atlantic Deep Water Marine Organic Matter Thermocline Water Southern Component
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