Gas Transfer Velocities for Sf6 and He-3 in a Small Pond at Low Wind Speeds

Publication Type  Journal Article
Year of Publication  1995
Authors  Clark, J. F.; Schlosser, P.; Wanninkhof, R.; Simpson, H. J.; Schuster, W. S. F.; Ho, D. T.
Journal Title  Geophysical Research Letters
Volume  22
Issue  2
Pages  93-96
Journal Date  Jan 15
ISBN Number  0094-8276
Accession Number  ISI:A1995QH63300004
Key Words  exchange; helium; water

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(-1), no variations of gas transfer velocity with wind speed could be resolved with our data. Gas transfer velocities at wind speeds greater than 3 m s(-1) 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.


Qh633Times Cited:23Cited References Count:20

URL  <Go to ISI>://A1995QH63300004