FIGURE 5.
The trends of the mean diurnal cycle of ecosystem respiration (RECO; a–f) retrieved by NNC‐part (black line), daytime method (DT; gray line), and nighttime method (NT; dashed gray line). The differences between diurnal cycle of retrieved RECO (g–l) are also shown: NNC‐part‐DT (continuous black line), NNC‐part‐NT (dashed black line), and NT‐DT (gray line). Only FLUXNET2015 study sites at northern hemisphere (latitude > +15°N), having at least 2 years of data, were used for that analysis