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. 2021 Oct 5;12:5815. doi: 10.1038/s41467-021-25983-9

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Ebullitive CH₄ flux as a function of surface sediment temperature (data were binned in 1 °C intervals; see Methods) from June to September 2009–2014 for the edge vs. middle regions of a Lake Mellersta Harrsjön (MH) (MH edge—n = 1581, MH middle—n = 795 independent ebullitive CH₄ flux measurements) and b Lake Inre Harrsjön (IH) (IH edge—n = 2318, IH middle—n = 432 independent ebullitive CH₄ flux measurements). Error bars in a and b are 95% confidence intervals, fit lines are 2nd-degree polynomials, and points are means. c Arrhenius plots of the data in a and b (n = 5126 independent ebullitive CH₄ flux measurements); ln(bubble CH₄ flux) vs. the inverse surface sediment temperature in K. Points are means and error bars are 95% confidence intervals. Data are color-coded by the lake and by edge (littoral) and middle (pelagic) zones.