title: A refined 2010-based VOC emission inventory and its improvement on modeling regional ozone in the Pearl River Delta Region, China.
abstract: Accurate and gridded VOC emission inventories are important for improving regional air quality model performance. In this study, a four-level VOC emission source categorization system was proposed. A 2010-based gridded Pearl River Delta (PRD) regional VOC emission inventory was developed with more comprehensive source coverage, latest emission factors, and updated activity data. The total anthropogenic VOC emission was estimated to be about 117.4 × 10(4)t, in which on-road mobile source shared the largest contribution, followed by industrial solvent use and industrial processes sources. Among the industrial solvent use source, furniture manufacturing and shoemaking were major VOC emission contributors. The spatial surrogates of VOC emission were updated for major VOC sources such as industrial sectors and gas stations. Subsector-based temporal characteristics were investigated and their temporal variations were characterized. The impacts of updated VOC emission estimates and spatial surrogates were evaluated by modeling O₃ concentration in the PRD region in the July and October of 2010, respectively. The results indicated that both updated emission estimates and spatial allocations can effectively reduce model bias on O₃ simulation. Further efforts should be made on the refinement of source classification, comprehensive collection of activity data, and spatial-temporal surrogates in order to reduce uncertainty in emission inventory and improve model performance.
authors: College of Environment and Energy, South China University of Technology, University Town, Guangzhou 510006, PR China.
authors: Shasha
authors: S
authors: Yin
authors: College of Environment and Energy, South China University of Technology, University Town, Guangzhou 510006, PR China. Electronic address: zheng.junyu@gmail.com.
authors: Junyu
authors: J
authors: Zheng
authors: College of Environment and Energy, South China University of Technology, University Town, Guangzhou 510006, PR China; Shanghai Academy of Environmental Sciences, Shanghai 200233, PR China.
authors: Qing
authors: Q
authors: Lu
authors: Atmospheric Research Center, HKUST Fok Ying Tung Graduate School, Nansha IT Park, Guangzhou 511458, PR China.
authors: Zibing
authors: Z
authors: Yuan
authors: College of Environment and Energy, South China University of Technology, University Town, Guangzhou 510006, PR China.
authors: Zhijiong
authors: Z
authors: Huang
authors: Guangdong Provincial Environmental Monitoring Center, Guangzhou 510045, PR China.
authors: Liuju
authors: L
authors: Zhong
authors: Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Hong Kong, PR China.
authors: Hui
authors: H
authors: Lin
keywords: Emission inventory; Ozone modeling; Pearl River Delta (PRD); VOCs