The use of pCO2 for the study of biological production in natural waters has advantages over the use of oxygen related to the persistence of changes in pCO2, the magnitude of the changes, and the possibility of making continuous recordings of surface-water pCO2 from a ship underway. The method of calculating biological production is discussed and illustrated with data from coastal waters off Massachusetts.
Teal, John M., and John Kanwisher. 1966. "The use of pCO2 for the calculation of biological production, with examples from waters off Massachusetts." Journal of Marine Research 24, (1). https://elischolar.library.yale.edu/journal_of_marine_research/1060