Data description:
These data sets contain data from agricultural grassland site at Qvidja in southern Finland (60.29550°N, 22.39281°E, elevation 5 m) measured from 4 May 2018 to 3 May 2020.


Fluxes_Heimsch_et_al_2020.csv
	- post processed, quality screened and gap-filled CO2 and H2O eddy covariance flux measurements
	- columns:
		period_end: date and time, local summer time
		wind direction (deg)
		wind speed (m/s)
		L-1 (m-1): stability
		NEE (mg CO2 m-2 s-1): gap-filled net ecosystem exchange (NEE)
		gapped_NEE: flagging of gapped NEE data (1=gapped, 0=measured)
		Reco (mg CO2 m-2 s-1): ecosystem respiration (Reco)
		unc_Reco: uncertainty of Reco
		GPP (mg CO2 m-2 s-1): gross primary production (GPP)
		unc_GPP: uncertainty of GPP
		LE (W m-2): gap-filled latent heat flux
		gapped_LE: flagging of gapped LE data (1=gapped, 0=measured)
	- The EC data from 5 January to 28 March 2019 were affected by technical issues with an inlet filter, 
	   which resulted in an erroneous reading of the internal analyser pressure. For this period, the 10-Hz 
	   mixing ratios were recalculated from the recorded absorptance data using the instrument-specific 
	   calibration functions. The mean CO2 mixing ratio was set to 410 ppm in these calculations.
		

Meteorology_Heimsch_et_al_2020.csv
	- meteorological measurements 
	- columns:
		period_end: date and time, local summer time
		avg(T (C)): half-hourly average temperature
		avg(RH (%)): relative humidity
		avg(NetRad (W/m2)): net radiation
		avg(PAR (umol/(m2*s))): photosynthetically active radiation
		avg(T5cm (C)): soil temperature measured at the depth of 5cm
		avg(SoilMoist (V)): soil moisture measurements at the depth of 10cm
	- Soil temperature measurements were not recorded before May 2019 due to technical issues with the sensor in the first measurement year.
		
LAI_Heimsch_et_al_2020.csv
	- leaf area index obtained from Sentinel-2 satellite data
	- columns:
		Date
		LAI: Leaf area index
		LAI_std: standard deviation of LAI		


Precipitation_Heimsch_et_al_2020.csv
	- precipitation
	- columns:
		datetime: date and time, local summer time
		precipitation (mm): half-hourly sum of precipitation measured at 1-minute values


SOC_Heimsch_et_al_2020.xlsx
	- soil organic carbon content
	- columns:
		Soil core 1-5: 1 meter soil core sample 
		Total SOC kg/m2: total soil organic carbon in the measured layer
		Cumul. SOC kg/m2: total soil organic carbon from surface down to the depth measured
		