Increase in the atmospheric CO2 due to fossil fuel usage, change in agricultural practices and deforestation is balanced by draw down by the land and ocean biota.  About 104.9 Pg (1 Petagram = 1 Gigaton= 1015 grams) of carbon is fixed per year by the global biota, out of which about 46.2 per cent (48.5 … Continue reading Calculating Carbon Uptake by the Oceans