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| Observations of Aerosol Optical Properties in the Beijing Urban Area in Summer |
| JING Jun-Shan,ZHANG Ren-Jian,TAO Jun,ZHANG Lei-Ming |
| 1.Key Laboratory of Regional Climate-Environment Research for Temperate East Asia (RCE-TEA), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;2.Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;1.Key Laboratory of Regional Climate-Environment Research for Temperate East Asia (RCE-TEA), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;3. South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China;1.Key Laboratory of Regional Climate-Environment Research for Temperate East Asia (RCE-TEA), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;4.Air Quality Research Division, Science and Technology Branch, Environment Canada, Toronto, Canada |
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Abstract To investigate aerosol optical properties in the Beijing metropolitan area, aerosol absorption coefficient (Ab), scattering coefficient (Sc), and fine particulate matter (PM2.5) were measured in the Beijing urban area from 20 May to 30 August 2009. The average Ab, Sc, single scattering albedo (SSA), and PM2.5 concentration were 58.0±39.5 M m-1, 343.5±353.7 M m-1, 0.80±0.10 and 63.6±50.0 mg m-3, respectively, during the observation period. Ab, Sc, and SSA all showed single peak diurnal variations, with their maximum values being measured at 0500, 1000, and 1300 local time, respectively. Ab and Sc had a strong positive correlation with PM2.5, and Ab, Sc, and PM2.5 all had positive correlations with relative humidity and negative correlations with wind speed.
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Received: 07 June 2011
Revised: 18 September 2011
Accepted: 20 September 2011
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