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BG | Articles | Volume 15, issue 10
Biogeosciences, 15, 3085–3092, 2018
https://doi.org/10.5194/bg-15-3085-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 15, 3085–3092, 2018
https://doi.org/10.5194/bg-15-3085-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 18 May 2018

Research article | 18 May 2018

Use of argon to measure gas exchange in turbulent mountain streams

Robert O. Hall Jr. and Hilary L. Madinger

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Alin, S., Maria de Fátima, F., Salimon, C., Richey, J. E., Holtgrieve, G. W., Krusche, A. V., and Snidvongs, A.: Physical controls on carbon dioxide transfer velocity and flux in low-gradient river systems and implications for regional carbon budgets, J. Geophys. Res.-Biogeosci., 116, G01009, https://doi.org/10.1029/2010JG001398, 2011. a
Appling, A. P., Hall, Jr., R. O., Yackulic, C. B., and Arroita, M.: Overcoming equifinality: Leveraging long time series for stream metabolism estimation, J. Geophys. Res.-Biogeosci., 123, 624–645, https://doi.org/10.1002/2017JG004140, 2018. a, b, c
Asher, W. and Wanninkhof, R.: Transient tracers and air-sea gas transfer, J. Geophys. Res.-Oceans, 103, 15939–15958, 1998a. a
Asher, W. E. and Wanninkhof, R.: The effect of bubble-mediated gas transfer on purposeful dual-gaseous tracer experiments, J. Geophys. Res.-Oceans, 103, 10555–10560, 1998b. a, b
Bernhardt, E., Heffernan, J., Grimm, N., Stanley, E., Harvey, J., Arroita, M., Appling, A., Cohen, M., McDowell, W., Hall, R., Read, J., Roberts, B., Stets, E., and Yackulic, C.: The metabolic regimes of flowing waters, Limnology and Oceanography, 63, s99–s118, https://doi.org/10.1002/lno.10726, 2018. a
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Streams exchange oxygen with the atmosphere, but this rate is difficult to measure. We added argon to small mountain streams to estimate gas exchange. We compared these rates with sulfur hexafluoride, an intense greenhouse gas. Argon worked well to measure gas exchange, but had higher-than-predicted rates than sulfur hexafluoride. Argon exchange is more likely to represent that for oxygen because they share similar physical properties. We suggest argon to measure gas exchange in small streams.
Streams exchange oxygen with the atmosphere, but this rate is difficult to measure. We added...
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