1. Ding Yihui and Sun Ying, 2006: Recent advances in climate change science. Adv. Climate Change Res., 24, 161–167. (in Chinese)
2. Gilgen, H., M. Wild, and A. Ohmura, 1998: Means and trends of shortwave irradiance at the surface estimated from GEBA. J. Climate, 11, 2042–2061.
3. Guan Fulai, 2010: A study of regional distinctive features of surface solar radiation in North and East China. Ph.D. thesis, Nanjing University of Information Science & Technology, 23–26.
4. Hatzianastassiou, N., C. Matsoukas, A. Fotiadi, et al., 2005: Global distribution of Earth’s surface shortwave radiation budget. Atmos. Chem. Phys., 5, 2847–2867.
5. Hinkelman, L. M., P. W. Stackhouse Jr., B. A. Wielicki, et al., 2009: Surface insolation trends from satellite and ground measurements: Comparisons and challenges. J. Geophys. Res., D00D20, doi: 10.10 29/2008JD011004.