Gas transfer velocities for SF6 and He-3 in a small pond at low wind speeds

Details Gas transfer velocities for SF6 and He-3 in a small pond at low wind speeds Gas transfer velocities for SF6 and He-3 in a small pond at low wind speeds

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22...93c&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 22, no. 2, p. 93-96

Other

9

Air Water Interactions, Gas Exchange, Helium Isotopes, Low Speed, Ponds, Sulfur Hexafluoride, Wind Velocity, Concentration (Composition), Ratios, Water

Scientific paper

Gas transfer velocities for two gases, SF6 (sulfur hexafluoride) and He-3, were determined in a small pond by injecting a mixture of these gases into the water and monitoring the decline of their concentrations over the next eight days. For wind speeds between 1.5-2.5 m/s, no variations of gas transfer velocity with wind speed could be resolved with our data. Gas transfer velocites at wind speeds greater than 3 m/s were substantially larger and consistent with other lake tracer experiments. From the ratio of gas transfer velocities for SF6 and He-3, we calculated the Schmidt number exponent to be 0.57 +/- 0.07.

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