NDLI: Vertical observations and analysis of PM2.5, O3, and NO x at Beijing and Tianjin from towers during summer and Autumn 2006

Content Provider	Springer Nature Link
Author	Sun, Yang Wang, Yuesi Zhang, Changchun
Copyright Year	2010
Abstract	During the period between 18 August and 22 September 2006, an ultraviolet photometric O3 analyzer, a NO-NO2-NO x chemiluminescence analyzer, and a quartz micro-oscillating-scale particle concentration analyzer were simultaneously used for monitoring at three different heights each at Beijing (325-m tower) and Tianjin (255-m tower). These towers belong to the Institute of Atmospheric Physics (IAP) of the Chinese Academy of Sciences (CAS) and to the Tianjin Municipal Meteorological Bureau, respectively. These measurements were used to continuously measure the atmospheric O3 and NO x volume-by-volume concentrations and the PM2.5 mass concentration within a vertical gradient. When combined with meteorological data and information on the variation of vertical characteristics of the various atmospheric pollutants in the two cities, analysis shows that these two cities were seriously polluted by both PM2.5 and O3 during summer and autumn. The highest daily-average concentrations of PM2.5 near the ground in Beijing and Tianjin reached 183 µg m−3 and 165 µg m−3, respectively, while the O3 concentrations reached 52 ppb and 77 ppb, and NO x concentrations reached 48 ppb and 62 ppb for these two cities, respectively. The variations in the daily-average concentrations of PM2.5 between Beijing and Tianjin were demonstrated to be consistent over time. The concentrations of PM2.5 measured in Beijing were found to be higher than those in Tianjin. However, the overall O3 concentrations near the ground in Tianjin were higher than in Beijing. NO x concentrations in Tianjin were consistently lower than in Beijing. It was also found that PM2.5 pollution in Beijing’s atmosphere may also be affected by the pollutants originating in and delivered from Tianjin, and that Tianjin was impacted by Beijing’s pollutants at a significantly reduced level.
Starting Page	123
Ending Page	136
Page Count	14
File Format	PDF
ISSN	02561530
Journal	Advances in Atmospheric Sciences
Volume Number	27
Issue Number	1
e-ISSN	18619533
Language	English
Publisher	SP Science Press
Publisher Date	2009-12-29
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	urbanization in Bohai O3 NO x PM2.5 vertical distribution near the ground Geophysics/Geodesy Meteorology/Climatology
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science

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