Characteristics and the Origins of the Carbonaceous Aerosol at a Rural Site of PRD in Summer 2006
Carbonaceous aerosol including organic carbon (OC) and elemental carbon (EC) was measured at a sub-urban site near Guangzhou City in July 2006 during PRIDE-PRD campaign, using a semi-continuous thermal-optical analyzer. The average OC concentrations for three type periods during the campaign (local emission, typhoon and normal days) were 28.1μgC/m3, 4.0μgC/m3 and 5.7μgC/m3, respectively, and EC were 11.6μgC/m3, 1.8μgC/m3, and 3.3μgC/m3 orderly. Compared to the constant diurnal enhancement ratios of primary EC, the enhancement ratio of OC (OC versus CO-CObackground) remained n a relative high level in the afternoon which showed similar diurnal variation to oxygenated organic aerosol (OOA ), indicating the strong photochemical formation of OC in the afternoon. We modified the traditional EC tracer method and used this modified approach to estimate the daily secondary organic carbon formation, which showed that the average SOC concentration in BG site was about 2.0±2.3 μgC/m3 , accounting for about 47 ％ mass value of OC.
Carbonaceous aerosol Secondary formation SOC estimation Modified EC tracer method
Weiwei Hu Min Hu Peng Lin Zhiqiang Deng Y. Kondo N. Takegawa Han Sunghee Yongjing Zhao
State Key Joint Laboratory of Environmental Simulation and Pollution Control,College of Environmenta Research Center for Advanced Science and Technology,University of Tokyo,4-6-1 Komaba,Meguro,Tokyo 15 Mechanical and Aeronautical Engineering,University of California,USA
国际会议
西安
英文
361-367
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）