Instrument tower at Pt. Barrow Observatory (from NOAA/ESRL)
Radiometers in Barrow, Alaska that are part of the Baseline Surface Radiation Network (BSRN) suite. from NOAA ESRL
Alert, Nunavut, Canada is the most northerly site in the World Meteorological
Organization (WMO) Global Atmospheric Watch (GAW) Network. from NOAA/CMDL