Articles | Volume 17, issue 7
Biogeosciences, 17, 1911–1932, 2020
https://doi.org/10.5194/bg-17-1911-2020
Biogeosciences, 17, 1911–1932, 2020
https://doi.org/10.5194/bg-17-1911-2020

Research article 08 Apr 2020

Research article | 08 Apr 2020

Drivers of diffusive CH4 emissions from shallow subarctic lakes on daily to multi-year timescales

Joachim Jansen et al.

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Cited articles

Baldocchi, D., Falge, E., and Wilson, K.: A spectral analysis of biosphere–atmosphere trace gas flux densities and meteorological variables across hour to multi-year time scales, Agr. Forest Meteorol., 107, 1–27, https://doi.org/10.1016/S0168-1923(00)00228-8, 2001. 
Banko-Kubis, H. M., Wurl, O., Mustaffa, N. I. H., and Ribas-Ribas, M.: Gas transfer velocities in Norwegian fjords and the adjacent North Atlantic waters, Oceanologia, 61, 460–470, https://doi.org/10.1016/j.oceano.2019.04.002, 2019. 
Bartosiewicz, M., Laurion, I., and MacIntyre, S.: Greenhouse gas emission and storage in a small shallow lake, Hydrobiologia, 757, 101–115, https://doi.org/10.1007/s10750-015-2240-2, 2015. 
Bastviken, D., Cole, J., Pace, M., and Tranvik, L.: Methane emissions from lakes: Dependence of lake characteristics, two regional assessments, and a global estimate, Global Biogeochem. Cy., 18, GB4009, https://doi.org/10.1029/2004GB002238, 2004. 
Bastviken, D., Santoro, A. L., Marotta, H., Pinho, L. Q., Calheiros, D. F., Crill, P., and Enrich-Prast, A.: Methane Emissions from Pantanal, South America, during the Low Water Season: Toward More Comprehensive Sampling, Environ. Sci. Technol., 44, 5450–5455, https://doi.org/10.1021/es1005048, 2010. 
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Short summary
Lakes are important emitters of the greenhouse gas methane. We use field observations and a model to evaluate the importance of known drivers of methane production and release. Fast and slow changes of the diffusive flux were governed by wind speed and sediment temperature, respectively. Increased turbulence enhanced release, but storms depleted the lakes of gas and limited emissions. Our findings may inform model studies on the effects of weather and climate change on lake methane emissions.
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