Fig. 3From: Estimation of greenhouse gas emission factors based on observed covariance of CO2, CH4, N2O and CO mole fractionsTemporal variation of SCP (a), ventilation coefficient (b), hourly precipitation amount (c), boundary-layer height (d) and sea level pressure (e) averaged over the 9 grid-points covered by the study (see Fig. 2), as well as the cold-air pool episodes (gray shaded periods)Back to article page