This group will produce global estimates of gas transfer velocity, which allows a representation of air–sea gas exchange to be consistent in all global models. Individual estimates of gas fluxes diverge because different gas exchange parameterisations are employed. A widely accepted product of gas transfer will permit the intercomparison of flux estimate studies and is critical to the work of the other Working Groups.
The working group will also produce estimates of dry and wet deposition of material relevant for biogeochemical air–sea interactions. Global estimations of wet and particle deposition velocities can be combined with estimates of concentrations of the chemical species of interest to produce flux estimates. Such a scheme requires a synthesis of present measurements and a framework into which new measurements can be incorporated to improve the estimates.
Products:
- Global climatology of gas transfer velocity, dry and wet deposition velocities, atmospheric concentrations of trace metals in aerosol and soluble forms, and gas deposition
- Synthesis of the role of bubbles, surfactants rain and wind on gas transfer.