Fig. 3

Global distributions of CO2 in mountain streams. a Altitude of mountain streams, where mountains as defined according to ref. 7. b–d Global distribution of predicted CO2 exchange velocities (k\({}_{{\mathrm{CO}}_{2}}\)), CO2 gradients between the streamwater and the atmosphere (ΔCO2) and the areal CO2 fluxes (F\({}_{{\mathrm{CO}}_{2}}\)), respectively. e–h Latitudinal transects of these same parameters at 1-degree resolution (shown are median values in black and 5 and 95% confidence intervals in gray)