This study analyses the diurnal seasonal mean and the seasonal and annual variation in the radiation budget at the Ali Meteorological Bureau observation station in the northern Tibetan Plateau for 2019. The results indicate that the daily average variation in incidental shortwave and reflected radiation across all seasons in the Ali area had typical unimodal symmetry. The average daily variation in incidental shortwave radiation was in phase with reflected radiation, but the amplitude of the incidental shortwave radiation was greater than that of reflected radiation. The daily amplitude, daily average, and monthly average upwelling longwave radiation were greater than those for downwelling radiation, and the diurnal cycle of downwelling atmospheric radiation lagged behind that of upwelling longwave radiation. The daily amplitude of surface net radiation in winter in the Ali area was less than in other seasons, as expected, and the seasonal transformation had a great impact on the net radiation for this region. The net radiative energy at the surface was highest in late spring and early summer, which played a decisive role in the formation of terrestrial and atmospheric heating.

本研究分析了2019年青藏高原北部阿里气象局观测站辐射收支的日季节平均值和季节和年度变化。阿里地区具有典型的单峰对称性。入射短波辐射的平均日变化与反射辐射同相，但入射短波辐射的幅度大于反射辐射的幅度。上升流长波辐射的日振幅、日均值和月均值均大于下降流辐射，下降流大气辐射的日循环滞后于上升流长波辐射。阿里地区冬季地表净辐射日幅值低于其他季节，符合预期，季节转换对该地区的净辐射影响较大。地表净辐射能在春末夏初最高，对陆地和大气加热的形成起到了决定性作用。