Photochemical production of ozone and control strategy for Southern Taiwan

Shiu, Chengshi; Liu, Shaw Chen; Chang, Chih-Chung; Chen, Jen‐Ping; Chou, Charles C.‐K.; Lin, Chuan-Yao; Young, Chea-Yuan

doi:10.1016/j.atmosenv.2007.09.014

Cited by 69 publications

(48 citation statements)

References 55 publications

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“…For example, Cardelino and Chameides (1995) applied the OBM to analyze ozone-precursor relationships using the 1990 Atlanta O 3 study data. Shiu et al (2007) studied photochemical O 3 production in southern Taiwan and found that reducing emissions of non-methane hydrocarbons (NMHCs) is more effective in controlling O 3 than reducing NO x . By analyzing some high O 3 episode cases, Zhang et al (2007) found that the formation of O 3 throughout Hong Kong was limited by VOCs, especially reactive aromatics, and high NO concentrations suppressed ozone production.…”

mentioning

confidence: 99%

On the relationship between ozone and its precursors in the Pearl River Delta: application of an observation-based model (OBM)

Cheng

Guo

Wang

et al. 2009

Environ Sci Pollut Res

108

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mentioning

confidence: 99%

On the relationship between ozone and its precursors in the Pearl River Delta: application of an observation-based model (OBM)

Cheng

Guo

Wang

et al. 2009

Environ Sci Pollut Res

108

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“…[17] The OPE x is an important indicator to evaluate O 3 -NO x -VOCs sensitivity and to make effective O 3 control strategies in urban areas [Couach et al, 2004;Rickard et al, 2002;Shiu et al, 2007;Sillman, 1999;Xu et al, 2009;Zaveri et al, 2003]. The OPE x can be derived from the regression slopes of correlations between O x and NO z [Kleinman et al, 1994;Trainer et al, 1993].…”

Section: Ozone Production Efficiency (Ope X )mentioning

confidence: 99%

Nitrogen dioxide measurement by cavity attenuated phase shift spectroscopy (CAPS) and implications in ozone production efficiency and nitrate formation in Beijing, China

Sun

Liu

et al. 2013

JGR Atmospheres

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Nitrogen dioxide (NO2) is a key species in studying photochemical smog and formation mechanisms of nitrate in fine particles. However, the conventional commercially available chemiluminescence (CL)‐based method often has uncertainties in measuring NO2 because of interferences with other reactive nitrogen species. In this study, an Aerodyne Cavity Attenuated Phase Shift Spectroscopy (CAPS) NO2 monitor that essentially has no interferences with nitrogen containing species was deployed in Beijing for the first time during August 2012. The CAPS NO2 monitor is highly sensitive with a detection limit (3σ) of 46.6 ppt for 1 min integration. The NO2 measured by CAPS shows overall agreement with that from CL, yet large differences up to 20% were also observed in the afternoon. Further, the discrepancies of NO2 measurements between CAPS and CL appear to be NOz dependent with larger differences at higher NOz concentrations (e.g., > 14 ppb). As a result, the ozone production efficiency of NOx (OPEx) derived from the correlations of Ox‐NOz with the CL NO2 can be overestimated by 19–37% in Beijing. The daily OPEx calculated with the CAPS NO2 ranges from 1.0 to 6.8 ppb/ppb with an average (±1σ) of 2.6 (±1.3) for the entire study. The relatively low OPEx and the relationship between OPEx and NOx suggest that ozone production chemistry is VOC sensitive during summer in Beijing. Two case studies further show that high concentrations of NOx can significantly enhance the formation of nitrate in fine particles in the presence of high O3 and favorable meteorological conditions.

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“…This study attempts to determine whether such VOC emission reductions are meaningful in the western region. Photochemical ozone production rates and the limiting factors were investigated for southern Taiwan (Shiu et al, 2007) under westerly wind conditions (i.e., the influence of air from the Asian continent), but the analysis was performed after the domestic influence became dominant. The limiting factor for an air mass that has just arrived could be different from that after the effect of domestic emissions becomes dominant.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of Photochemical Ozone Production Rates and Limiting Factors in Continental Outflow Air Masses Reaching Fukue Island, Japan: Ozone-Control Implications

Kanaya

Tanimoto

Yokouchi

et al. 2016

Aerosol Air Qual. Res.

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Asian continental outflow air masses reach western Japan in the springtime, carrying high levels of ozone produced over the Asian continent, and facilitating in-situ production. In this study, in-situ production was highlighted; the rate and limiting factors of net ozone production were diagnosed at Fukue Island, a remote island west of Japan, on 17 days during May-June 2009, when the continental outflow air mass arrived, using an observation-based modeling approach. The average ozone production was estimated to be 6.8 ppb per day. Information on the chemical status of the arriving air mass is important, because it affects how further ozone production in the air mass occurs after precursor addition from Japanese domestic emissions. The main limiting factor of ozone production for such air masses was usually nitrogen oxides (NO x ), suggesting that domestic NO x emission control is important in reducing further ozone production. Volatile organic compounds (VOCs) also increased the ozone production rate, and occasionally (14% of time) became the dominant controlling factor. This analysis implies that the VOC reduction legislation recently enacted by the Japanese government should be effective. VOC-limited conditions occurred particularly when the air mass traveled within 6-8 h, via the Korean Peninsula. The uncertainty in the radical chemistry mechanism governing ozone production had a non-negligible impact, but the main conclusion relevant to policy was not altered. When chain termination was augmented by HO 2 + NO/NO 2 reactions in the presence of H 2 O and by heterogeneous loss of HO 2 on aerosol particle surfaces, as recently verified or hypothesized, the daily ozone production rate decreased by up to 24%, and the fraction of hours when the VOC-limited condition occurred varied from 14% to 13-26%.

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Photochemical production of ozone and control strategy for Southern Taiwan

Cited by 69 publications

References 55 publications

On the relationship between ozone and its precursors in the Pearl River Delta: application of an observation-based model (OBM)

On the relationship between ozone and its precursors in the Pearl River Delta: application of an observation-based model (OBM)

Nitrogen dioxide measurement by cavity attenuated phase shift spectroscopy (CAPS) and implications in ozone production efficiency and nitrate formation in Beijing, China

Diagnosis of Photochemical Ozone Production Rates and Limiting Factors in Continental Outflow Air Masses Reaching Fukue Island, Japan: Ozone-Control Implications

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