Abstract：Based on the observational gradient date of black carbon aerosol (BC), pollutants, and meteorological data at Tianjin boundary layer station from August 12 to September 18, 2010, characteristics and influencing factors of BC concentration variation were analyzed. The average concentration of BC was 6.309mg/m3 and its mass percentage in PM10 was 4.17%.The absorption of BC accounted for 10.23% of total aerosol extinction. Influenced by human activity and boundary layer structure, the diurnal variation of BC showed two peaks, peaked at 7:00, lowest during 14:00~16:00, and the second peak at 20:00. BC concentration decreased with wind speed increasing. The BC concentration was generally lower than 5 mg/m3 when the wind speed higher than 4m/s. West and northwest wind had obvious transportation effect on BC in Tianjin city. The probability of high BC events with the concentration greater than 10mg/m3 was 18.07%. Inversion and atmospheric stability could lead to BC accumulate in the near surface layer and form high pollution events.
蔡子颖, 韩素芹, 黄鹤, 姚青. 天津夏季黑碳气溶胶及其吸收特性的观测研究[J]. 中国环境科学, 2011, 31(5): 719-723.
CAI Zi-Ying, HAN Su-Qin, HUANG He, YAO Qing. Observational study on black carbon aerosols and their absorption properties in summer in Tianjin. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(5): 719-723.
