Measurement of the vertical profile of atmospheric SO₂ during the heating period in Beijing on days of high air pollution

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• 作者：Sun Yang ; Wang Yuesi ; Zhang Changchun
• 关键词：SO₂ ; Vertical profile ; Atmospheric environmental pollution
• 刊名：Atmospheric Environment
• 出版年：2009
• 出版时间：January 2009
• 年：2009
• 卷：43
• 期：2
• 页码：468-472
• 全文大小：342 K

文摘

This paper reports altitude-resolved concentrations of sulfur dioxide (SO₂) and particulate matter up to 10 microns in diameter (PM₁₀) in the planetary boundary layer of major urban centers during extreme pollution episodes. The concentration of SO₂ was observed continuously from November 24, 2004, to December 4, 2004, in Beijing during the heating period. Fluorescence SO₂ analyzers were used to measure the atmospheric SO₂ concentrations. Four SO₂ analyzers were placed at 4 different levels (8 m, 47 m, 120 m, and 280 m) of the 325-m high meteorological observation tower of the Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences. A maximal SO₂ concentration of 172.3 ppb was measured during this pollution episode, and SO₂ concentration increased with altitude and reached its maximal value at 50 m. The study also analyzed the meteorological situation before, during, and after the pollution episode.