... under the Creative Commons Attribution 3.0 License.AtmosphericChemistryand Physics Volatile Organic Compound (VOC) measurements in the Pearl River Delta (PRD) region, China Ying Liu1, Min Shao1, ... sites in the Pearl River Delta (PRD) region of China during the Air Quality MonitoringCampaign spanning 4 October to 3 November 2004. Two of the sites, Guangzhou (GZ) and Xinken (XK), were intensivesites ... measurement in PRD, China Liu et al, Figure 1 Fig. 1. Location of sites for the 2004 Air Quality Monitoring Cam-paign in the Pearl River Delta (PRD). The star indicates intensivesites, and the...