Physics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1221p&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 18, July 1991, p. 1221-1224.
Physics
12
Air Water Interactions, Carbon Dioxide, Heat Flux, Heat Transfer, Nonequilibrium Conditions, Partial Pressure, Gas-Solid Interfaces, Mass Transfer, Nonequilibrium Thermodynamics, Transport Properties
Scientific paper
Existing data on CO2 fluxes between air and sea have been calculated by assuming, incorrectly, that the thermodynamic driving force for the CO2 flux is provided solely by the CO2 partial pressure difference between the two phases. Because both heat and matter transfer occur under nonequilibrium conditions, with finite temperature and composition differences across the interface, a proper description of transport at the air-water interface requires the use of irreversible thermodynamics, according to which the heat and matter fluxes are coupled through the heat of solution of the gas. The present treatment shows that the driving force for CO2 transport due to the temperature difference across the interface is comparable with that arising from the partial pressure difference.
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