Data refers to the CNR-IGG eddy covariance (EC) facility at the Arctic CZO (Critical Zone Observatory, hereafter CZO@Bayelva in Ny Ålesund). Data have been collected since 2019, all year long, with some interruptions due to ordinary or factory maintenance. The EC tower was installed to study CO2, H20, latent and sensible heat exchanges between soil, vegetation, and atmosphere. Carbon dioxide fluxes and environmental variables are recorded to estimate changes in carbon storage and explore CO2 fluxes drivers in the Arctic tundra. Measured parameters: Net vertical turbulent CO2 flux (umol+1s-1m-2); air temperature (deg_C), air relative humidity (%), wind speed (m+1s-1), max wind speed (m+1s-1), wind direction (deg_from_north). Method: The EC station respects both sensors and data processing standards defined by the ICOS community even if it is not an ICOS-associated station. Flux processing software: EddyPro set to default processing settings. The output variables have a 30-minutes resolution. The parameters available here are obtained by aggregating over a 3-hours time span. The associated measurement time (column B in the uploaded file) indicates the beginning of the 3-hour averaging period (es. Time T= [Time T; Time T+2h30 min]). Instrumentation: 3-Dimensional Sonic Anemometer (Manufacturer: Gill HS-50, s.n.: H183304, Firmware: 3.01, Instrument height: (info in the yearly metadata), North alignment: SPAR, North offset: (info in the yearly metadata), Wind data format: u, v, w); Enclosed path CO2/H2O Gas Analyzer (Licor Li7200RS, s.n.: 72H-0888, Firmware: (info in the yearly metadata), Tube length: 105.8 cm, Tube diameter: 5.33 mm, Northward separation: (info in the yearly metadata), Eastward separation: (info in the yearly metadata), Vertical separation: (info in the yearly metadata)). Quality assurance: Mauder and Foken (2004) flagging policy (0-1-2 system). Here, only high-quality data are reported (qc=0).

The CNR-IGG Researchers took the photo of the eddy covariance during the field campaign.