Anthropogenic aerosol optical depth during days of high haze levels in the Beijing winter[J]. Journal of Remote Sensing, 2013, 17(4): 993-1007. DOI: 10.11834/jrs.20133071.
we estimated anthropogenic contributions to Aerosol Optical Depth ( AOD) during days of high haze level using ground-based measurements in Beijing ( January 2009 and 2013) . We compared the anthropogenic AOD ( AODan ) with optical parameters determined directly from aerosol samples. The results showed: ( 1) The monthly mean AODan ( at 440 nm) of January was 0.88 in 2009 and 0. 44 in 2013; ( 2) The proportion of days where contributions from AODan dominated in January 2013 was 86. 7%
higher than that in January 2009 ( 62. 5% ) ; ( 3) The ratio of the AODan to total AOD ( at 440 nm) was about 88% in January 2013
indicating the importance of the anthropogenic aerosol contribution to haze pollution; ( 4) The two haze events studied featured contributions from accumulation of local pollutants and pollutants transported from surrounding areas of Beijing.