An observational study of the radiation balance on eastern Antarctic Plateau

Based on the radiation data of Panda-1 AWS in eastern Antarctic Plateau from February 2011 to January 2012, the radiation balance characteristics of this region were analyzed. The results show that: Summer is the main periods absorbing solar energy when the daily mean downward solar radiation is 365.0 W/m2, and about 2752 MJ/m2 soalr radiation reaches the surface, accounting for 58% of the total solar radiation( 4776 MJ/m2). The situation of the instantaneous downward shortwave radiation higher than the atmosphere top radiation is found in every season, and the frequency is highest in spring and lowest in winter. The mean diurnal variations of the downward shortwave radiation and the upward shortwave radiation show a single peak curve. Except summer, the downward long wave radiation almost has no diurnal variation. The upward longwave radiation appears to be in the form of single kurtosis and single valley in each season except summer. For the whole year the net radiation is basically negative, and only in December and January it is small positive value, with the annual mean net radiation of -8.7 W/m2. The land compared to the atmosphere is a cold source. Panda-1 has similar radiation balance characteristics to other Antarctic inland plateau sites, where the lackness of strong winds forces, and the small surface longwave radiation heat loss, lead the winter and annual mean net radiation to being less than the katabatic wind zone.