FIGURE 5.

Future projections of methane production rates in lake sediments. (a) The spatial patterns in methane (CH₄) production rates in lake sediments by the end of the 21st century (2070–2099) under representative concentration pathway (RCP) 8.5 (high‐emission scenario), relative to the historical (1970–1999) global average; (b) the percent increase in future CH₄ production rates as a function of latitude under RCP 2.6 (low‐emission scenario), 6.0 (medium‐high‐emission scenario), and 8.5; and (c) the absolute change in lake sediment CH₄ production rates during the historical period and by the end of the 21st century. All results are based on the lake‐climate model ensemble. In panels b and c, the averages are smoothed with a running mean across 2° latitudes.