Fig. 6: N₂O fluxes (soil and eddy covariance) related to the chance of sunshine and fog formation.

Relationship between the monthly sum of soil and EC fluxes of N₂O (mg N m⁻² month⁻¹) with the percentage of days with a high chance of sunshine (cloudiness ratio <0.4) and fog formation (dew point depression <4 °C). During the drought onset (May 2018) and dry-minor (June–July 2019) periods photochemical reactions might play an important role in decreasing ecosystem (EC) flux of N₂O, whereas during the Wet (September–November 2017) and freeze-thaw (February 2019) periods absorption on wet surfaces and water droplets could be the reason for the decrease in EC N₂O flux. The difference between the soil and EC N₂O fluxes is negatively correlated with the percentage of days in a month with dew point depression <4 °C, whereas a positive trend is observed both in the difference between soil and EC flux and the share of sunny days (cloudiness ratio < 0.4) in a month.