Extended Data Figure 1: Map of study region in Saskatchewan, Canada.
From: Decrease in CO2 efflux from northern hardwater lakes with increasing atmospheric warming
Hardwater lakes of the Qu’Appelle catchment (triangles) were monitored every two weeks from May to September during 1995–2010 (ref. 19), and closed-basin lakes were monitored monthly (open circles) or annually (filled circles) during 2002–2010 (except 2006)29. Weekly monitoring of pH occurred at Buffalo Pound Lake (black triangle) during 1979–2007. All lakes are situated in prairie grassland ecozones with pronounced precipitation deficits (annual precipitation − potential evaporation) of 40–60 cm yr−1 (dashed lines)18,29.
