A land-based field station, two moored buoys and data from the Finnpartner ship were used
to investigate the variability of the air–sea CO2-flux and parameters controlling the flux
during one year in the Baltic Sea region. The agreement between the sea surface partial
pressure of CO2 measured near the tower and from the ship in the central parts of the Baltic
Proper was relatively good during most of the period. But, during periods with intense
biological activity or strong upwelling there were significant differences. The flux of CO2 was …