From Mean Fluxes to a Detailed Experimental Investigation of the Gas Transfer Process

by Bernd Jähne, Scripps Inst of Oceanography, La Jolla, United States,

Document Type: Proceeding Paper

Part of: Air-Water Mass Transfer


Three new experimental techniques are discussed which allow a much more detailed investigation of the gas transfer process than any previous techniques. Using heat as a proxy tracer for gases allows to control the flux across the interface and to measure the local transfer rate with a time resolution of several minutes in the field. The two other techniques are based on acid and alkaline gases and fluorescent pH indicators. They are used in wind/wave tunnels to measure the spatial and temporal patterns of the thickness of the mass boundary layer and time series of vertical concentration profiles within the boundary layer.

Subject Headings: Dissolved gases | Boundary layers | Water waves | Sea water | Wind waves | Acids | Alkalinity | pH

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