Measurement of Dissolved PCO2 in Seawater
Atmospheric CO2 is one of the elements responsible for the greenhouse effect on Earth. The way its concentration evolves has significant consequences on the climate of our planet. Oceans are known to act as both CO2 sinks and sources, and for the essential, though badly quantified, role they play in the evolution of atmospheric CO2. It is critical to better understand and characterise the gas exchange process between the atmosphere and the ocean. The concentration in atmospheric CO2 is relatively well known, and that of the ocean must be accurately measured.
Given the great space and time variability of dissolved CO2 at the surface of the ocean, an experimental approach aimed at acquiring series of measurements can be adopted using drifting platforms, such as the CARIOCA buoy, in order to complement the data acquired with ships and anchored buoys.
Reference to the article: New in situ estimates of carbon biological prodution rates in southern Ocean from Carioca drifter measurements by J Boutin et L. Merlivat ( Geophysical Research letter vol 36 L13608 - 2009).