RETRIEVAL OF AEROSOL OPTICAL PROPERTIES OVER LAND BASED ON NOAA/AVHRR DATA AND ITS APPLICATION FOR EASTERN CHINA HAZE EVENT IN JANUARY 2013

摘要

Due to the important influence of earth radiative and health-related effects, monitoring aerosols using satellite data is important both for the assessment of aerosol optical properties and for its rapid and flexible response to natural hazards. In this paper, Aerosol Optical Depth (AOD) and aerosol type are simultaneously retrieved based on NOAA/AVHRR data, using GOES-R (Geostationary Operational Environmental Satellite) algorithm. With the removal of cloudy pixels from clear and hazy pixels, MODIS MCD43C2 BRDF/Albedo snow-free quality product was processed to AVHRR observation geometries and then input as surface reflectance. Lookup tables were constructed offline utilizing six aerosol types obtained from AERONET ground-based observations. Lastly, AOD and aerosol type were retrieved based on the performance of top-of-atmospheric spectral reflectances of channel 1 and 2. Above algorithm is applied to analyze Eastern China severe haze event in January 2013. We found that AOD increases significantly during haze event and aerosol type tends to be polluted-related. Backward trajectory results from HYSPLIT (HYbrid Single-Particle Lagrangian Integrated Trajectory model) show that haze moves mainly in Eastern China and close to the ground, which can partly explain the long duration of this serious haze event.