Münsterer, Thomas
Mayer, Hans Jürgen
Jähne, Bernd
1995-12-01
<p>A combination of two laser-induced fluorescence (LIF) techniques for measurements<br />
of vertical concentration profiles of dissolved gases and thus<br />
the investigation of micro-turbulence in the aqueous mass boundary layer<br />
at a free interface is presented. The first one uses an acid-base reaction<br />
of the fluorescence indicator fluorescein at the water surface to visualize<br />
the concentration profiles. The second one uses fluorescence quenching of<br />
pyrenebutyric acid by oxygen. Both experiments are done simultaneously<br />
at the same location.<br />
The advantage of a combined experiment is that the two techniques utilized<br />
here to visualize the concentration profiles are caused by different<br />
independent physical effects, i.e. an acid-base reaction and the fluorescence<br />
quenching by oxygen. Simultaneous measurements can help to detect possible<br />
systematic errors and offer the chance to learn more about the underlying<br />
gas exchange mechanisms.<br />
Experiments performed at the circular facility of the University of Heidelberg<br />
using a surfactant to suppress waves are presented. For three wind<br />
speeds the mean and fluctuating boundary layer properties are investigated.</p>
https://doi.org/10.5281/zenodo.10406
oai:zenodo.org:10406
Zenodo
https://zenodo.org/communities/asi
https://doi.org/
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
3rd Intern. Symp. on Air-Water Gas Transfer, Heidelberg, Germany, 24-27 July 1995
air-sea gas exchange
aqueous mass boundary layer
LIF
laser-induced fluorescence
Dual-tracer measurements of concentration profiles in the aqueous mass boundary layer
info:eu-repo/semantics/conferencePaper