The objective of this study was to determine the black carbon concentration in Beijing in 2003.The aerosol properties were measured using an Aethalometer and a tapered element oscillating microbalance(TEOM)on the roof...The objective of this study was to determine the black carbon concentration in Beijing in 2003.The aerosol properties were measured using an Aethalometer and a tapered element oscillating microbalance(TEOM)on the roof of the Physics Building of Peking University(39.99°N,116.31°E)from July to August 2003 and from November 2003 to January 2004.The average black carbon(BC)concentrations in the summer and winter were 8.80 and 11.4μg/m3,respectively.During winter,two different cyclone cut offs were installed at the inlet of an aethalometer.The BC mass concentration in TSP,PM_(10),and PM_(2.5)were obtained.The results indicated that in winter aerosol,90%of BC exited in PM_(10)and 82.6%of BC exited in PM_(2.5).The BC in PM_(10)accounted for 5.11%of the PM_(10)mass.展开更多
基金This work was supported by the National Key Basic Research and Development(973)Program of China(Grant No.G1999045700).
文摘The objective of this study was to determine the black carbon concentration in Beijing in 2003.The aerosol properties were measured using an Aethalometer and a tapered element oscillating microbalance(TEOM)on the roof of the Physics Building of Peking University(39.99°N,116.31°E)from July to August 2003 and from November 2003 to January 2004.The average black carbon(BC)concentrations in the summer and winter were 8.80 and 11.4μg/m3,respectively.During winter,two different cyclone cut offs were installed at the inlet of an aethalometer.The BC mass concentration in TSP,PM_(10),and PM_(2.5)were obtained.The results indicated that in winter aerosol,90%of BC exited in PM_(10)and 82.6%of BC exited in PM_(2.5).The BC in PM_(10)accounted for 5.11%of the PM_(10)mass.
