Table 3: Database structure and description		
		
Column header name	Unit/Format	Description
Date_Time_WET_TRANC	(yyyy-mm-dd HH:MM)	Time stamp of specific campaign, for acronyms see Table 1
Ta	(degC)	Air temperature
RH	(%)	Relative humidity
Rg	(W m-2)	Global radiation
WS	(m s-1)	Wind speed
WD	(deg)	Wind direction
ustar	(m s-1)	Friction velocity
zeta	(-)	Atmospheric stability
precipitation	(mm)	Precipitation (rain + snow)
total_Nr_conc	(ppb)	Concentration of total reactive nitrogen (SNr)
total_Nr_flux_meas_q012	(ng m-2 s-1)	Flux of total reactive nitrogen (SNr), only measured fluxes with quality flag 0 and 1 and 2
total_Nr_flux_meas_qc	(-)	Quality flag according to Mauder and Foken (2006)
total_Nr_flux_gf_MDV	(ng m-2 s-1)	Flux of total reactive nitrogen (SNr), gap-filled with MDV method
total_Nr_flux_gf_model	(ng m-2 s-1)	Flux of total reactive nitrogen (SNr), gap-filled with model
total_Nr_flux_gf_MDV_model	(ng m-2 s-1)	Flux of total reactive nitrogen (SNr), gap-filled with MDV method, further gaps with model