Study On Aerosol Direct Radiative Effect Based On Satellite And Ground Observation In Yangtze River Delta

With the rapid development of urbanization, the air pollution has become an important problem in the process of human development. As an important component of atmospheric composition, aerosol is closely related to the atmospheric environment quality not only, and in a very radiation energy balance plays an important role. Accurate monitoring of aerosol optical properties and the effect of the direct radiation can not only deepen the understanding of the climate system energy balance, also can be in the state of air pollution prevention and governance plays an important role. Therefore, this article respectively measured data, satellite data for foundation (low spatial resolution data with high spatial resolution) analysis of the effect of the aerosol direct radiation.Through the AERONET aerosol optical parameters of the site of Yangtze river delta and aerosol direct radiation effect analysis of Taihu lake site found that aerosol optical thickness, single scattering albedo, asymmetric factor, aerosol direct radiation effect is the largest in summer and the lowest in winter. Angstrom and Fine Mode Fraction is the largest in autumn and the lowest in spring. Further statistical analysis to get long delta aerosol types is given priority to with weak absorption and moderate absorption type fine particles.This article selects the period 2005-2014 sky MODIS data to calculate the aerosol direct radiation effect, get the Yangtze river delta region ground and atmospheric aerosol direct radiation effect 10 average, respectively 102.916W/m2 and 3.079W/m2.Validated using AERONET Taihu lake and Hangzhou site data analysis, get the Taihu lake and Hangzhou site ground and atmospheric aerosol direct radiation effect of the average relative error was 22.07%,19.62% and 29.62%,19.62%.Further direct radiation effect of Yangtze delta region aerosol space-time analysis, found that the aerosol direct radiation effect value to present the characteristics of low south high north, to the top of atmospheric aerosol direct radiation effect on present value as the center, in central to increasing surrounding the distribution characteristics of summer aerosol direct radiation effect value is the lowest, the highest in winter. Aerosol direct radiation effect value is always the lowest in the Shanghai area, followed by Jiangsu, the biggest influence of Shanghai by aerosols, cooling effect is obvious.Finally with high temporal resolution CCD data HJ-1 for a short time process of air pollution in Nanjing aerosol optical properties and the effect of the direct radiation research. Calculated on March 3rd, March 4th, March 7th of AOD average value is 0.41,0.54 and 0.79 respectively, the ground for aerosol direct radiation effect on average value is-75.6Wm-2,-98.1Wm-2,-138.2Wm-2, to the top of atmospheric aerosol direct radiation effect on the average value is-3.7Wm-2,-5.2Wm-2,-8.1Wm-2. Aerosol optical thickness and the direct radiation effect on further analysis of time and space, found that the aerosol pollution is by local industrial production, vehicle emission, and caused by human activities, with the regional air pollution there is no direct relationship.