Nonlinear response of ozone to precursor emission changes in China: a modeling study using response surface methodology

Xing, Jia; Wang, Yafei; Jang, Carey; Zhu, Yun; Hao, Jiming

doi:10.5194/acp-11-5027-2011

Cited by 195 publications

(154 citation statements)

References 45 publications

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“…Enhanced surface O 3 concentrations were found over rural areas of Shanghai compared to the city center (Geng et al, 2008;Xing et al, 2011). This probably resulted from the significant contribution of anthropogenic emissions of NO in the city center, which consumes ambient ozone through NO titration (i.e., NO+O 3 → NO 2 +O 2 ).…”

Section: Ozone Vertical Distributionmentioning

confidence: 93%

Observations of the vertical distributions of summertime atmospheric pollutants and the corresponding ozone production in Shanghai, China

et al. 2017

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Abstract. Ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) and lidar measurements were performed in Shanghai, China, during May 2016 to investigate the vertical distribution of summertime atmospheric pollutants. In this study, vertical profiles of aerosol extinction coefficient, nitrogen dioxide (NO 2 ) and formaldehyde (HCHO) concentrations were retrieved from MAX-DOAS measurements using the Heidelberg Profile (HEIPRO) algorithm, while vertical distribution of ozone (O 3 ) was obtained from an ozone lidar. Sensitivity study of the MAX-DOAS aerosol profile retrieval shows that the a priori aerosol profile shape has significant influences on the aerosol profile retrieval. Aerosol profiles retrieved from MAX-DOAS measurements with Gaussian a priori profile demonstrate the best agreements with simultaneous lidar measurements and vehicle-based tethered-balloon observations among all a priori aerosol profiles. Tropospheric NO 2 vertical column densities (VCDs) measured with MAX-DOAS show a good agreement with OMI satellite observations with a Pearson correlation coefficient (R) of 0.95. In addition, measurements of the O 3 vertical distribution indicate that the ozone productions do not only occur at surface level but also at higher altitudes (about 1.1 km). Planetary boundary layer (PBL) height and horizontal and vertical wind field information were integrated to discuss the ozone formation at upper altitudes. The results reveal that enhanced ozone concentrations at ground level and upper altitudes are not directly related to horizontal and vertical transportation. Similar patterns of O 3 and HCHO vertical distributions were observed during this campaign, which implies that the ozone productions near the surface and at higher alPublished by Copernicus Publications on behalf of the European Geosciences Union.

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Section: Ozone Vertical Distributionmentioning

confidence: 93%

Observations of the vertical distributions of summertime atmospheric pollutants and the corresponding ozone production in Shanghai, China

et al. 2017

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“…For example, the non-linear response of pollutant concentrations to precursors' emissions has not been well considered in current zero-out method. More advanced sensitivity analysis methods such as high-order direct decoupled methods (Hakami et al, 2003;Cohan et al, 2005), response surface modeling (Wang et al, 2011b;Xing et al, 2011;Zhao et al, 2015) are recommended for further sensitivity studies. Besides, uncertainties still exists for the aerosol concentration predictions and future work is needed in to get better model performance.…”

Section: Discussionmentioning

confidence: 99%

Local and Regional Contributions to Fine Particle Pollution in Winter of the Yangtze River Delta, China

Cheng

Yang

et al. 2016

Aerosol Air Qual. Res.

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The Yangtze River Delta (YRD) is one of the most developed and heavily polluted regions in China. Understanding the origin of fine particles is necessary for policy making on air pollution control in this region. However, the current studies on quantifying the contributions from different emission source regions are limited, especially for winter pollution. In this study, field observations and scenario analysis simulations were performed by using the Weather Research and Forecasting and Community Multi-scale Air Quality (WRF/CMAQ) model to quantify the impacts of local emissions and long-range regional transport in a winter period of 2011. The results indicated that the local contributions were dominant on average in the whole period, especially for slight or medium pollution hours. However, when particle pollution increased, the effects of long-range regional transport significantly increased. The inner-regional effects from Jiangsu and the outerregional effects from the upwind adjacent province, Shandong, are crucial for the YRD region. The dominant contributor could be local accumulation or long-range regional transport, which usually depends on the weather conditions. This study provides a systematic analysis of the characteristics and origins of winter pollution in the YRD according to combined observations and modeling, which is helpful for understanding regional particle pollution formation and policy making on improving air quality in this region.

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“…However, most of these studies have concluded that East Asian megacity regions are mostly in the VOC limited regime (Tseng et al, 2009;Y. H. Zhang et al, 2008;Lim et al, 2011;Cheng et al, 2010;Shao et al, 2009a, b;Xing et al, 2011). Recently, however, a modeling study by Li et al (2013) in the Pearl River Delta region in China demonstrated the time dependence of ozone production regimes.…”

Section: Implications Of the Uncertainty In Ho X Estimations In Assesmentioning

confidence: 99%

Impact of isoprene and HONO chemistry on ozone and OVOC formation in a semirural South Korean forest

Kim

Lee³

et al. 2015

Atmos. Chem. Phys.

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Abstract. Rapid urbanization and economic development in East Asia in past decades has led to photochemical air pollution problems such as excess photochemical ozone and aerosol formation. Asian megacities such as Seoul, Tokyo, Shanghai, Guangzhou, and Beijing are surrounded by densely forested areas, and recent research has consistently demonstrated the importance of biogenic volatile organic compounds (VOCs) from vegetation in determining oxidation capacity in the suburban Asian megacity regions. Uncertainties in constraining tropospheric oxidation capacity, dominated by hydroxyl radical, undermine our ability to assess regional photochemical air pollution problems. We present an observational data set of CO, NO x , SO 2 , ozone, HONO, and VOCs (anthropogenic and biogenic) from Taehwa research forest (TRF) near the Seoul metropolitan area in early June 2012. The data show that TRF is influenced both by aged pollution and fresh biogenic volatile organic compound emissions. With the data set, we diagnose HO x (OH, HO 2 , and RO 2 ) distributions calculated using the University of Washington chemical box model (UWCM v2.1) with nearexplicit VOC oxidation mechanisms from MCM v3.2 (Master Chemical Mechanism). Uncertainty from unconstrained HONO sources and radical recycling processes highlighted in recent studies is examined using multiple model simulations with different model constraints. The results suggest that (1) different model simulation scenarios cause systematic differences in HO x distributions, especially OH levels (up to 2.5 times), and (2) radical destruction (HO 2 + HO 2 or HO 2 + RO 2 ) could be more efficient than radical recycling (RO 2 + NO), especially in the afternoon. Implications of the uncertainties in radical chemistry are discussed with respect to ozone-VOC-NO x sensitivity and VOC oxidation product formation rates. Overall, the NO x limited regime is assessed except for the morning hours (8 a.m. to 12 p.m. local standard time), but the degree of sensitivity can significantly vary depending on the model scenarios. The model results also suggest that RO 2 levels are positively correlated with oxygenated VOCs (OVOCs) production that is not routinely constrained by observations. These unconstrained OVOCs can cause higher-than-expected OH loss rates (missing OH reactivity) and secondary organic aerosol formation. The series of modeling experiments constrained by observations strongly urge observational constraint of the radical pool to enable precise understanding of regional photochemical pollution problems in the East Asian megacity region.

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Nonlinear response of ozone to precursor emission changes in China: a modeling study using response surface methodology

Cited by 195 publications

References 45 publications

Observations of the vertical distributions of summertime atmospheric pollutants and the corresponding ozone production in Shanghai, China

Observations of the vertical distributions of summertime atmospheric pollutants and the corresponding ozone production in Shanghai, China

Local and Regional Contributions to Fine Particle Pollution in Winter of the Yangtze River Delta, China

Impact of isoprene and HONO chemistry on ozone and OVOC formation in a semirural South Korean forest

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