Details

Autor(en) / Beteiligte

• Cao, J.J
• Lee, S.C
• Ho, K.F
• Zhang, X.Y
• Zou, S.C
• Fung, Kochy
• Chow, Judith C
• Watson, John G

Titel

Characteristics of carbonaceous aerosol in Pearl River Delta Region, China during 2001 winter period

Ist Teil von

• Atmospheric environment (1994), 2003-04, Vol.37 (11), p.1451-1460

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2003

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Concentrations and distributions of organic carbon (OC) and elemental carbon (EC) in atmospheric particles were measured at 8 sites in four cities (Hong Kong, Guangzhou, Shenzhen and Zhuhai) of Pearl River Delta Region (PRDR), China during two winter months (January and February, 2002). PM 2.5 and PM 10 samples were collected on pre-fired quartz filters with mini-volume samplers and analyzed using thermal optical reflectance (TOR) method. Average PM 2.5 and PM 10 level were 72.6 and 111.5 μg m −3, respectively, with PM 2.5 constituting 70.4% of the PM 10 mass. The average OC and EC concentrations in PM 2.5 were 14.7 and 6.1 μg m −3, respectively, while those in PM 10 were 19.7 and 7.8 μg m −3, respectively. The carbonaceous aerosol accounted for 40.2% of the PM 2.5 and 35.9% of the PM 10. The average OC/EC ratio was 2.4 for PM 2.5 and 2.5 for PM 10, which are comparable with most urban cities in the world. The OC and EC in PRDR were found to be strongly correlated (correlation coefficients >0.7). Secondary organic carbon was found to constitute 42.6% and 38.4% of the total organic carbon in PM 2.5 and PM 10, respectively.