Effects of Mesoscale Eddies on Southern Ocean Biogeochemistry

Cyclonic eddies pump DIC and nitrate upwards leading to less oceanic carbon uptake, and anticyclonic eddies have the opposite impact• Cyclonic eddies pump low-oxygen water upwards (anticyclones opposite) and eddy trapping leads to opposite anomalies at depth • The net anomalous eddy-induced Southern Ocean carbon uptake is ∼0.02±0.02Pg C yr -1 , with larger signals seasonally and regionally