Geoscientific Instrumentation, Methods and Data Systems
Geoscientific Instrumentation, Methods and Data Systems
GI
Articles | Volume 9, issue 1
Articles | Volume 9, issue 1
https://doi.org/10.5194/gi-9-141-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gi-9-141-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 9, issue 1
Research article
 | 
20 Apr 2020
Research article |  | 20 Apr 2020

Continuous in situ measurement of dissolved methane in Lake Kivu using a membrane inlet laser spectrometer

Roberto Grilli, François Darchambeau, Jérôme Chappellaz, Ange Mugisha, Jack Triest, and Augusta Umutoni

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Cited articles

Bärenbold, F., Boehrer, B., Grilli, R., Mugisha, A., Tümpling, W. von, Umutoni, A., and Schmid, M.: Updated dissolved gas concentrations in Lake Kivu from an intercomparison project, 2019. 
Boehrer, B., Von Tümpling, W., Mugisha, A., Rogemont, C., and Umutoni, A.: Reliable reference for the methane concentrations in Lake Kivu at the beginning of industrial exploitation, Hydrol. Earth Syst. Sci., 23, 4707–4716, https://doi.org/10.5194/hess-23-4707-2019, 2019. 
Brennwald, M. S., Schmidt, M., Oser, J., and Kipfer, R.: A Portable and Autonomous Mass Spectrometric System for On-Site Environmental Gas Analysis, Environ. Sci. Technol., 50, 13455–13463, https://doi.org/10.1021/acs.est.6b03669, 2016. 
Ciais, P., Sabine, C., Bala, G., Bopp, L., Brovkin, V., Canadell, J., Chhabra, A., DeFries, R., Galloway, J., Heimann, M., Jones, C., Quéré, C. Le, Myneni, R. B., Piao, S., and Thornton, P.: Carbon and Other Biogeochemical Cycles, in: Climate Change 2013: The Physical Science Basis, Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T. F., Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K., Boschung, J., Nauels, A., and Xia, Y., 465–570, 2013. 
Degens, E. T., von Herzen, R. P., Wong, H. K., Deuser, W. G., and Jannasch, H. W.: Lake Kivu: structure, chemistry and biology of an East African rift lake, Geol. Rundschau, 62, 245–277, https://doi.org/10.1007/BF01826830, 1973. 
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Short summary
We report the results from the deployment of a newly developed in situ sensor for dissolved gas measurements. Its adaptation to high gas concentrations and dissolved gas pressures was proven. The campaign leads to a first continuous profile of methane on the first 150 m and allowed us to compare the data with previous measurements. The fast response of the instrument makes this technique a good candidate for regular monitoring of those type of lakes, for anticipating disastrous gas eruptions.
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