| Summary: | This dataset contains in situ measurements of the atmosphere-surface moisture fluxes (precipitation, evapotranspiration) and the associated atmospheric drivers of evapotranspiration at 45 terrestrial sites in northern high latitudes. For each site, the raw measurements for 30-minute periods have been aggregated into daily, weekly and monthly averages of the atmospheric variables and daily totals of precipitation (P) and evapotranspiration (ET). The dataset is intended to facilitate diagnostic studies of the variations of the surface moisture balance over timescales of days to seasons. All sites have at least 3 years of data and are distributed as follows: Canada (10), Alaska (17), Russia (8), Finland (2), Sweden (3), Svalbard (1), Greenland (3), Iceland (1). Atmospheric variables include air temperature (2-meter), relative humidity, wind speed, sensible heat flux, ground heat flux, net shortwave radiation and net longwave radiation. Useful data are generally limited to the warm season (April/May through September/October). An auxiliary file includes the key descriptors for each site: AmeriFlux/FluxNet site name and identifier, latitude-longitude, years of data coverage, dominant vegetation type, and the presence or absence of permafrost.
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