Oxygen fluxes in the biosphere

Biospheric budget of oxygen and ozone in the context of globalization 245 

Reservoirs (t/kni2), fluxes (tknT2yr ) Identifier Estimate 

Oxygen in the upper photic layer of the World Ocean Ou 0.8 x 108 

Exchange at the atmosphere-inland water body border H° 16 18-140 

Nowadays and in the geological past there have been two sources of oxygen endogenic and photosynthetic. Without dwelling on the respective scientific discussions and all existing concepts, we shall try to describe the sources of oxygen in the present biosphere, following numerous studies in this field. 

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