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LIF measurements of concentration profiles in the aqueous mass boundary layer

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Abstract

 A laser-induced fluorescence (LIF) technique is described to measure vertical concentration profiles of gases in the aqueous mass boundary layer at a free water surface. The technique uses an acid-base reaction of the fluorescence indicator fluorescein at the water surface to visualize the concentration profiles. The technique is capable of measuring two-dimensional vertical concentration profiles at a rate of 200 frames/s and a spatial resolution of 16 μm. The mass boundary layer at a free surface is characterized by significant fluctuations. Direct surface renewal is observed. The mean profiles also support rather surface renewal models than turbulent diffusion models.

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Authors and Affiliations

  1. Institute for Environmental Physics, University of Heidelberg Im Neuenheimer Feld 366, 69120 Heidelberg, Germany and Scripps Institution of Oceanography Physical Oceanography Res. Div. La Jolla, CA 92093-0230, USA, , , , , , DE

    T. Münsterer & B. Jähne

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  1. T. Münsterer
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  2. B. Jähne
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Received: 21 May 1997/Accepted: 18 December 1997

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Münsterer, T., Jähne, B. LIF measurements of concentration profiles in the aqueous mass boundary layer. Experiments in Fluids 25, 190–196 (1998). https://doi.org/10.1007/s003480050223

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  • DOI: https://doi.org/10.1007/s003480050223

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