Shao Min, Zhang Yuanhang, Zeng Limin, Tang Xiaoyan, Zhang Jing, Zhong Liuju, Wang Boguang
State Joint Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
J Environ Manage. 2009 Jan;90(1):512-8. doi: 10.1016/j.jenvman.2007.12.008. Epub 2008 Jan 18.
In many regions of China, very rapid economic growth has been accompanied by air pollution caused by vehicle emissions. In one of these regions, the Pearl River Delta, the variations of ground-level ozone and its precursors were investigated. Overall, the ambient concentrations of NO(2) increased quickly between 1995 and 1996, but then slightly decreased due to stringent nitrogen oxide (NO(x)) emission controls. Nonetheless, ambient NO(2) levels in the Pearl River Delta remained high. The regional average concentrations of volatile organic compounds (VOCs) were 290 ppbC in summer and 190 ppbC in autumn. Local emissions and long-distance transportation of pollutants play important roles in the regional distribution of VOCs. Ambient O(3) production is significant in urban areas and also downwind of cities. The relative incremental reactivities (RIRs), determined by an observation-based model, showed that ground-level ozone formation in the Guangzhou urban area is generally limited by the concentrations of VOCs, but there are also measurable impacts of NO(x).
在中国的许多地区，经济的快速增长伴随着机动车排放造成的空气污染。在其中一个地区——珠江三角洲，对地面臭氧及其前体物的变化情况进行了调查。总体而言，1995年至1996年间，二氧化氮（NO₂）的环境浓度迅速上升，但随后由于严格的氮氧化物（NOₓ）排放控制而略有下降。尽管如此，珠江三角洲的环境二氧化氮水平仍然很高。挥发性有机化合物（VOCs）的区域平均浓度在夏季为290 ppbC，秋季为190 ppbC。污染物的本地排放和长距离传输在挥发性有机化合物的区域分布中起着重要作用。城市地区以及城市下风方向的环境臭氧生成量很大。通过基于观测的模型确定的相对增量反应活性（RIRs）表明，广州城区地面臭氧的形成通常受挥发性有机化合物浓度的限制，但氮氧化物也有可测量的影响。
