Variations of \(O_3\) and CO in Summertime at a Rural Site Near Beijing

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Variations of \(O_3\) and CO in Summertime at a Rural Site Near Beijing

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Title: Variations of \(O_3\) and CO in Summertime at a Rural Site Near Beijing
Author: Wang, Yuxuan; McElroy, Michael Brendon; Munger, J. William; Hao, Jiming; Ma, Hong; Nielsen, Chris; Chen, Yaosheng

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Citation: Wang, Y., Michael B. McElroy, WIlliam J. Munger, Jiming Hao, Hong Ma, Chris P. Nielsen, and Yaosheng Chen. 2008. Variations of \(O_3\) and CO in summertime at a rural site near Beijing. Atmospheric Chemistry and Physics 8(21): 6355-6363.
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Abstract: Large intra-season differences in mixing ratios of CO and \(O_3\) were detected at Miyun, a rural site north of Beijing, in summer 2006. Despite an increase in mean daytime mixing ratio of CO from 500 ppbv in June to 700 ppbv in July, mean daytime \(O_3\) dropped from 67 ppbv in June to 50 ppbv in July and August. The observed changes in CO and \(O_3\) are attributed to the influence of the summer monsoonal circulation that develops over the North China Plain in July. Photochemical production of \(O_3\) is reduced as a consequence of increased cloudiness during July and August, as indicated by the strong negative correlation observed between \(O_3\) and satellite observations of cloud optical depth, with cloudiness having little effect on CO. The analysis suggests a strategy for emission controls that could be implemented in an economically efficient manner to minimize the frequency of high levels of \(O_3\) during summer in Beijing.
Published Version: doi:10.5194/acp-8-6355-2008
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at
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