Evaluation and analysis of MODIS and VIIRS satellite aerosol optical depth products over China
This study evaluates six aerosol optical depth(AOD)products from MODIS and VIIRS in terms of retrieval accuracy,spatial coverage,spatial distribution,retrieval frequency,and their performance in retrieving extreme weather events based on the Aerosol Ground-based Observation Network Data(AERONET).It also analyzes the error sources from the perspectives of land use type,aerosol mode,and seasonal variation.The results indicate that MODIS AOD products outperform VIIRS AOD products.Among them,the MAIAC AOD product has the highest accuracy,with a correlation coefficient R value of 0.83 and a proportion of 65.03％falling within the expected error(EE);In terms of spatial coverage and retrieval frequency,VIIRS AOD products significantly surpass MODIS;From respect of retrieving extreme weather events for individual cases,MODIS AOD products demonstrate better performance in dust events,but all products require further improvement in retrieving forest fire events;The land use type,aerosol mode,and seasonal variation have a significant impact on the retrieval accuracy of the six AOD products.Specifically,the six AOD products show the following characteristics.They show higher accuracy in built-up land but lower accuracy in cropland,and they mainly underestimate coarse mode aerosols while overestimating fine mode aerosols.They achieve the highest retrieval accuracy in autumn and winter,while the lowest in summer.The expected research results can provide scientific guidance for the rational use of MODIS and VIIRS AOD products and the improvement of their retrieval algorithms.
万方数据
维普
