 The study proposes a remote sensing-based method to accurately retrieve surface radiation and delineate spatial characteristics in metropolitan areas, with an accuracy evaluation indicating that the difference between remotely sensed and in situ observed net radiation ranged within zero plus or minus 40W.M2. The strongly spatial heterogeneity of surface radiation components in metropolitan Beijing was closely related to land cover patterns from urban area to outskirts, and the study found that urbanization resulted in a cooling effect in net radiation flux in the daytime due to low atmospheric transmittances from massive aerosol concentration and high surface albedo from light-building materials. This article was authored by Wenhui Kuang, Aileen Liu, Yin Yin Do, and others.