Daily NEE data from Kumpula Helsinki

The net ecosystem exchange (NEE) was estimated from the eddy covariance measurements located in SMEAR III station. Measurements coming from the vegetation sector based on wind direction were used in order to limit emissions from the road located east of the tower. The daily values of NEE were calculated from the vegetation sector, with complete data coverage for a full day available for only 15 % of the days. Consequently, when individual data gaps were shorter than four hours, they were filled using linear interpolation. Dataset has been used in Thölix et al., 2024.