Atmospheric exchange of carbon dioxide in a low‐wind oligotrophic lake measured by the addition of SF6

  title={Atmospheric exchange of carbon dioxide in a low‐wind oligotrophic lake measured by the addition of SF6},
  author={Jonathan J. Cole and Nina F. Caraco},
  journal={Limnology and Oceanography},
  • J. ColeN. Caraco
  • Published 1 June 1998
  • Environmental Science
  • Limnology and Oceanography
Many freshwater lakes are supersaturated in CO2 with respect to the atmosphere. This concentration gradient implies a net flux of CO2 from the water to the air. The actual rate of gas exchange is governed by both this concentration gradient and the gas transfer coefficient, k. To directly measure k, we added the chemically and biologically inert gas, sulfur hexaflouride (SF6), to the epilimnion of Mirror Lake, New Hampshire, a small (15 ha), low‐wind softwater lake. k was independent of wind… 

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