Field Measurements of Gas Exchange

  • Wolfgang Roether
Part of the NATO Conference Series book series (NATOCS, volume 17)


A transfer coefficient is required to convert a measured ocean—atmosphere gas solubility disequilibrium into a net interfacial gas flux density. For many gases, the transfer between the interface and the bulk liquid (transfer coefficient kw) is rate controlling, whereas for other gases, notably reactive ones, a more complex situation has to be dealt with. The available oceanic field data for kw are presented. The value of kw increases considerably with wind velocity, and a total variation over more than one order of magnitude is probable. However, little field information exists for wind velocities lower than 5 m s−1 and, in particular, higher than about 10 m s−1. Available field methods to measure kw are described and their potential to fill the gaps in present knowledge is assessed.


Wind Velocity Schmidt Number Eddy Diffusion Dimethyl Sulfide Bulk Transfer Coefficient 
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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • Wolfgang Roether
    • 1
  1. 1.Institut für UmweltphysikUniversity of HeidelbergHeidelbergGermany

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