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《Journal of the Graduate School of the Chinese Academy of Sciences》 2007-05
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Study on sulfate and sulfur oxidation ratio in PM_(10) during heating season in Beijing

WEN Tian-Xue WANG Yue-Si ZHANG Kai(LAPC,Institute of Atmospheric Physics,Chinese Academy of Science,Beijing 100029,China)  
Sulfate is a major component of PM_(10) in atmosphere and its concentration is affected by many factors.In this article,sulfate concentration and sulfur oxidation ratio in heating season were measured with on-line systems,and the relationships between sulfur oxidation ratio and influencing factors were discussed.The results showed that the most abundant component of PM_(10) was sulfate and there was a significant correlation between sulfate and SO_2 during heating season in Beijing.Coal burning was still the primary pollution source in heating season. During non-pollution period,SO_4~(2-) was mainly from aged air mass with high sulfur oxidation ratio which was promoted by O_3 during long range transportation.During pollution period,SO_4~(2-) was mainly from original source with lower sulfur oxidation ratio which had no obvious correlation with O_3.Except wind speed,there were no significant correlations bwteen meterological facotrs and sulfate and between meteorological factors and sulfur oxidation ratio during observation.
【Fund】: 973项目(2006CB403705);; 国家自然科学基金项目(40605031 40525016)资助
【CateGory Index】: X51
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