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DataProcessing

v3	v4
43	43	When there are gaps in the Fluxnet time-series, 3-hourly non-bias ERA-interim data are used and consequently interpolate to match the half-hourly time resolution of the Fluxnet data. 'Air Temperature', 'Water Vapour Pressure', 'Wind speed', 'Longwave down Radiation' and 'Pressure' are linearly interpolated. 3-hourly precipitation are spread at half-hourly resolution using the observed mean frequency of precipitation. For the shortwave down radiation interpolation, we account for the solar angle evolution over the 3-hourly time period.
44	44
45		Last, in order to agree with the required meteorological fields by ORCHIDEE, precipitation is split into Rainfall and Snowfall by using a 0°C threshold and ~~VPD~~ is converted in 'Air specific humidity' using the Magnus Tetens relationship.
	45	Last, in order to agree with the required meteorological fields by ORCHIDEE, precipitation is split into Rainfall and Snowfall by using a 0°C threshold and Water Vapor Pressure is converted in 'Air specific humidity' using the Magnus Tetens relationship.
46	46
47	47	== Outputs of FLUXNET_DATA tool ==