摘要：Northern Eurasia is a region experiencing documented changes in temperature and
large-scale streamflow, yet little attention has been focused on the large-scale energy
budgets over the region. We compare station data and gridded radiation products from
reanalysis and remote sensing to evaluate the radiative fluxes across northern Eurasia. On
annual timescales, we find that the downward shortwave radiation products, with the
exception of those of the NCEP/NCAR reanalysis, compare well with long-term station
observations, but that this agreement breaks down with smaller timescales and for
downward longwave and upward shortwave and longwave radiation. Of the six
gridded products, the Surface Radiation Budget data set performs the best as
compared to observations. Differences in radiative fluxes are on the order of 15–20 W m−2 on seasonal timescales, averaged across the region, with larger variations spatially and at
smaller timescales. The resulting uncertainty in net radiation has implications for climate
and hydrologic analyses that seek to understand changes in northern Eurasia climate and
its hydrologic cycle.
