data from the TERENO database https://ddp.tereno.net/ddp/


"time": HH:MM:SS
"PAR":	photosynthetically active radiation [mol photons m-2 s-1]
"co2": CO2 partial pressure [mol mol-1]
"RH": relative air humidity [-]	
"Tair": air temperature [°C]	
"Pair": athmospheric pressure [kPa]	
"ps": soil water potential [cm]	
"nm": ?