Extended Data Fig. 5: Relationship between rates of subglacial methanogenesis, sediment thickness and observed annual CH4 flux at LG. | Nature

Extended Data Fig. 5: Relationship between rates of subglacial methanogenesis, sediment thickness and observed annual CH4 flux at LG.

From: Greenland melt drives continuous export of methane from the ice-sheet bed

Extended Data Fig. 5

Each panel corresponds to the different yearly lateral CH4(aq) flux estimates measured in 2015 (see Fig. 2). Each line type corresponds to the sediment thickness required under different catchment area conditions: 100% (solid line), 50% (long-dashed line) or 10% (short-dashed line) of the subglacial catchment to contribute to the observed CH4 flux. Any point on a line corresponds to the methanogenesis rate and subglacial sediment thickness required to generate the observed lateral CH4 flux. The four points on each line correspond to known methanogenic rates recorded from different subglacial habitats17.

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