Fig. 4: Ecosystem CH4 flux for heated and control treatments.
From: Large emissions of CO2 and CH4 due to active-layer warming in Arctic tundra
Average CH4 fluxes for each day of measurement showing difference in CH4 between heated and control plots in a 2015 June-September, b 2015 October shoulder season experiment (note different Y-axis scale), c 2016 May–July, and d 2016 August–October (note different Y-axis scale). Values are averages ± standard error of n = 3–4 blocks. Gray shaded areas indicate periods when the heating treatment was not on (e.g., pre-treatment measurement periods).
