American Society of Civil Engineers

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

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

pp. 244-256

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Document type: Conference Proceeding Paper
Part of: Air-Water Mass Transfer
Abstract: 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.

ASCE Subject Headings:
Air-water interactions
Heat transfer
Mass transfer
Probe instruments
Wind waves

Author Keywords:
Mass Transfer
Surface Waves - Water Waves
Air Sea Gas Exchange - Controlled Flux Technique - Gas Transfer Process