Carbon in the Pearl River Estuary

Region (PRDR), including Hong Kong and Macao, was one of the fastest growing regions in China. The PRDR was one of the first regions of China to experience massive industrialization and urbanization in recent years. 

OC and EC concentrations at the LG background site in Guangzhou were 5 8 times those at HT. The OC and EC concentrations at an urban site (ZU) in Guangzhou were around l 3 times higher than those at other urban sites in the three cities (BU, LH, and XZ), implying carbonaceous pollution in Guangzhou. 

The concentrations of OC and EC had a summer minimmn and a winter maximum at all the cities (Fig. 5.13). Comparing the summer results with those obtained at the same sampling sites during the winter shows that the average PM2.5 and PMio OC and EC concentrations during the winter were around 1.5 times higher than those during summer in the PRDR. Lower 

2 High Pcoa in Surface Water of the Pearl River Estuary and Its Maintaining Mechanism 

3 Non-Aromatic Hydrocarbons in Surface Sediments near the Pearl River Estuary 

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