Experiments in Fluids

, Volume 25, Issue 3, pp 190–196 | Cite as

LIF measurements of concentration profiles in the aqueous mass boundary layer

  • T. Münsterer
  • B. Jähne

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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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • T. Münsterer
    • 1
  • B. Jähne
    • 1
  1. 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, USADE

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