Satellite Remote Sensing Study Of China's Eastern Region Of The Surface Net Radiation

The paper uses the surface radiation observations from 08 to 17 o'clock and the Visible, Infrared digital cloud picture from GMS4 at the same time over Beijing, Tianjin, Jinan, Taiyuan, Hefei, Nanjing, Shanghai area in June and July 1994. The Infrared radiative fluxes emitted by earth-atmosphere system comes from the Infreared pictures and the solar radiative fluxes reflected by earth-atmosphere system comes from the Visible pictures, then the relationship between the surface net radiation and the satellite retrieval radiation is statistically discussed in this paper.The result show that the surface net radiative fluxes is linear to the solar radiation of top of atmosphere, the Infrared radiative fluxes emitted by earth-atmosphere system and the solar radiative fluxes reflected by earth-atmosphere system. The correlation coefficient keep on a high level. And in this paper we develop the regression equations ( for all days and for cloud days) to estimate the surface net radiation on an hour scale. After analyzing the equations, we find the standard error of them is less distinction and adapt to different circumstance.We test the model over Jinan area and find the model is available. By using the Visible and Infrared picture at 14, on July 1, 1994, the model can help us know the distribution situation over certain area.In this paper we also discuss the relationship between the total net radiation from 08 to 17 and the total solar radiation retrieved from the satellite visible picture at the same time interval. The result reveal the total surface net radiation is evidently reverse to the total solar radiation, the correlation coefficient of one station is high to 0.9. But Tianjin is exceptional, the total surface net radiation is correlative to the total infrared radiation. The paper test the model over Jinan and Nanjing, and reveal the sensitivity of the total net radiation to the total solar radiation reflected byearth-atmosphere system.The research of surface net radiation is vital to weather, climate, entironment,ocean,etc. As yet the work of this field in our country is few.