Observation and Numerical Simulation on Volatile Organic Compounds in Urban Area

Ouyang Yan, Jiang Wei-mei
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Abstract

In this paper the spatial and temporal distribution characteristics of volatile organic compound (VOCs) are simulated and analyzed by using the urban air quality numerical prediction system and compared with the observation data. It is found that the concentration of VOC in Nanjing is higher in the winter than in the summer. The ratio of the concentration values in the winter case to those in the summer case is 1.24. The diurnal variation characteristics of the VOC concentrations are evident. There are two peak values at 0900 (LST) and 1700 (LST) respectively. The spatial distributions of the VOC are tightly related to many factors such as the positions of emission sources, surface wind fields etc. These research are beneficial to preventing and controlling the photochemical pollutions in urban area.
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城市地区挥发性有机物的观测与数值模拟
本文利用城市空气质量数值预报系统对挥发性有机物(VOCs)的时空分布特征进行了模拟分析,并与实测数据进行了对比。研究发现,南京冬季VOC浓度高于夏季。冬季病例浓度与夏季病例浓度之比为1.24。挥发性有机化合物浓度的日变化特征明显。在0900 (LST)和1700 (LST)有两个峰值。VOC的空间分布与排放源位置、地面风场等因素密切相关。这些研究有助于城市光化学污染的防治。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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