Effect of upwelling, mixing, and high primary productivity on CO₂concentrations in surface waters of the Bering Sea

Late spring and early fall measurements were made of carbon dioxide concentration in Bering Sea surface waters north of Amukta and Samalga passes in the eastern Aleutian Islands. High values of CO2, NO3-N, and salinity were accompanied by low oxygen and temperature values. All the isopleths of these parameters give evidence of vertically mixed water. Seasonal variation of CO2 in surface waters was observed particularly in areas of low vertical mixing and high productivity.