The Development Of Haze Events Observed By Multi-satellite Retrievals And Meteorological Analvsis In Eastern China

With the rapid development of national economy and urbanization, the haze has become one of the environmental disasters in eastern China. Therefore, it is necessary to construct a Multi-source Satellite Model for monitoring formation, migration and vanishment of haze event in eastern China. Based on the two-stream approximate algorithm, we use the aerosol refractive index the curvature of the earth and land surface parameters to do Geostationary ocean color image (GOCI)\aerosol optical thickness(AOT) inversion. And the GOCI\AOT, National Polar-orbiting Partnership (NPP)\AOT and atmospheric parameters are adopted to construct a multi-satellite observation model to dynamically monitor haze event in Eastern China.The research shows:(1) Because GOCI is high solar zenith angle satellite, we must consider the influence of aerosol refractive index and the curvature of the earth for the use of the two-approximate algorithm, and recalculate the parameters of backscattering coefficient by BRDF, and the correlation of inversion result GOCI\AOT (555nm) with Moderate Resolution Imaging Spectroradiometer (MODIS)\AOT, NPP\AOT, are 0.8,0.9, respectively. (2) We improve Langley-Plot measuring AOT on the ground, by compensating the forward scattering, and we improve accuracy of using measurement AOT by spectrometer. (3) For the Yangtze Delta, there are two severe haze events in 2013 December, the first case of haze event could be defined as exogenous, originated in Hebei and Henan area in December 3rd and 4th at night, now migrated and spread to the Yangtze River Delta area quickly, the haze event is not disappear until 9th. The second endogenous haze, suddenly erupted in the Yangtze River Delta on 11th and disappered onl4th.It caused the serious haze events in 2013 in China. The second haze show that expect for external input, there is easy that endogenous haze event happened Yangtze River Delta in winter. (4) The weak wind field with (velocity<5m/s), and the inversion layer level of the air are important meteorological reasons causing the occurrence and retention of the haze around Yangtze Delta. But it is not necessary that the inversion layer during haze event. The high northwest wind is the main mechanism, driving the movement and dispersion of the haze.