Impact of air transport and secondary formation on haze pollution in the Yangtze River Delta: In situ online observations in Shanghai and Nanjing

Sun, Peng; Nie, Wei; Wang, Tianyi; Chi, Xuguang; Huang, Xin; Xu, Zheng; Zhu, Congzhi; Wang, Lei; Qi, Ximeng; Zhang, Qi; Ding, Aijun

doi:10.1016/j.atmosenv.2020.117350

Cited by 41 publications

(34 citation statements)

References 51 publications

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“…In terms of PM 2.5 and O 3 regional transport patterns, our findings are consistent with existing research but more specific to the grid cell level, which is more efficient for pollution monitoring and control (Ding et al, 2017;Fu et al, 2016;L. Li et al, 2016;Shu et al, 2020;Sun et al, 2020;L.L. Tang et al, 2016).…”

Section: Discussionsupporting

confidence: 90%

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Regional Transport of PM_2.5 and O₃ Based on Complex Network Method and Chemical Transport Model in the Yangtze River Delta, China

Wang

Huang

et al. 2022

JGR Atmospheres

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Section: Discussionsupporting

confidence: 90%

“…Shu et al (2020) conducted a study on O 3 source attribution based on ozone source apportionment technology (OSAT) in a regional transport model. Sun et al (2020) used the WRF-Chem model to simulate a winter scenario to study the regional pollution process. J.…”

mentioning

confidence: 99%

Regional Transport of PM_2.5 and O₃ Based on Complex Network Method and Chemical Transport Model in the Yangtze River Delta, China

Wang

Huang

et al. 2022

JGR Atmospheres

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“…Facing the high cost of environmental governance, enterprises will "force" themselves to recognize their technological shortcomings, improve production and environmental protection technologies, and adjust the energy consumption structure, so as to reduce energy consumption. In addition, LCCP can urge individuals and families to practice green and low-carbon lifestyles, actively use low-carbon products, and choose low-carbon travel modes by vigorously publicizing the green and low-carbon concepts and developing low-carbon public transportation systems [48]. These not only help to reduce energy consumption intensity but also further improve environmental quality, eventually reducing haze pollution.…”

Section: Hypothesis (H3)mentioning

confidence: 99%

Does Low-Carbon City Pilot Policy Alleviate Urban Haze Pollution? Empirical Evidence from a Quasi-Natural Experiment in China

Yan

Zhao

Yang

et al. 2021

IJERPH

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As a comprehensive environmental regulation, the low-carbon city pilot policy (LCCP) may have an impact on haze pollution. The evaluation of the effectiveness of LCCP on haze pollution is greatly significant for air pollution prevention and control. Taking LCCP as the starting point, in this study we constructed DID, PSM-DID, and intermediary effect models to empirically test the impact and mechanism of LCCP on haze pollution, based on the panel data of 271 cities in China from 2005 to 2018. The findings show that (1) LCCP has significantly reduced the urban haze pollution, and the average annual concentration of PM2.5 in pilot cities decreased by 14.29%. (2) LCCP can inhibit haze pollution by promoting technological innovation, upgrading the industrial structure, and reducing energy consumption. Among these impacts, the effect of technological innovation is the strongest, followed by industrial structure, and energy consumption. (3) LCCP has significantly curbed the haze pollution of non-resource dependent cities, Eastern cities, and large cities, but exerted little impact on resource-dependent cities, Central and Western regions, and small and medium-sized cities. (4) LCCP has a spatial spillover effect. It can inhibit the haze pollution of adjacent cities through demonstration and warning effects. This study enriches the relevant research on LCCP and provides empirical support and policy enlightenment for pollution reduction.

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“…Fine particulate matter, with an aerodynamic diameter smaller than 2.5 μm (PM2.5), has been significantly reduced in eastern China after the implementation of "Action Plan for Air Pollution Prevention and Control" since 2013 (Ding et al, 2019), while (secondary) organic aerosol are still much more abundant than in clean areas Sun et al, 2020). Here we investigated condensable oxygenated organic vapors observed by nitrate CI-APi-TOF in August-September 2019 at the Station for Observing Regional Processes and the Earth System (SORPES) in the western part of the YRD, an anthropogenic-emissions-dominated environment (Fu et al, 2013;Xu et al, 2017) mixed with enhanced biogenic emissions during summer (Wang et al, 2020a;Xu et al, 2021).…”

mentioning

confidence: 99%

Formation of condensable organic vapors from anthropogenic and biogenic VOCs is strongly perturbed by NO<sub>x</sub> in eastern China

Liu¹,

Nie²,

Li³

et al. 2021

Preprint

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Abstract. Oxygenated organic molecules (OOMs) are the crucial intermediates linking volatile organic compounds (VOCs) to secondary organic aerosol (SOA) in the atmosphere, but understandings on the characteristics of OOMs and their formations from VOCs are very limited. Ambient observations of OOMs using recently developed mass spectrometry techniques are still limited, especially in polluted urban atmosphere where VOCs and oxidants are extremely variable and complex. Here, we investigate OOMs, measured by a nitrate-ion-based chemical ionization mass spectrometer at Nanjing in eastern China, through performing positive matrix factorization on binned mass spectra (binPMF). The binPMF analysis reveals three factors about anthropogenic VOCs (AVOCs) daytime chemistry, three isoprene-related factors, three factors about biogenic VOCs (BVOCs) nighttime chemistry, and three factors about nitrated phenols. All factors are influenced by NOx in different ways and to different extents. Over 1000 non-nitro molecules have been identified and then reconstructed from the selected solution of binPMF, and about 72 % of the total signals are contributed by nitrogen-containing OOMs, mostly regarded as organic nitrates formed through peroxy radicals terminated by nitric oxide or nitrate-radical-initiated oxidations. Moreover, multi-nitrates account for about 24 % of the total signals, indicating the significant presence of multiple generations, especially for isoprene (e.g., C5H10O8N2 and C5H9O10N3). Additionally, the distribution of OOMs concentration on carbon number confirm their precursors driven by AVOCs mixed with enhanced BVOCs during summer. Our results highlight the decisive role of NOx on OOMs formation in densely populated areas, and encourage more studies on the dramatic interactions between anthropogenic and biogenic emissions.

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Impact of air transport and secondary formation on haze pollution in the Yangtze River Delta: In situ online observations in Shanghai and Nanjing

Cited by 41 publications

References 51 publications

Regional Transport of PM_2.5 and O₃ Based on Complex Network Method and Chemical Transport Model in the Yangtze River Delta, China

Regional Transport of PM_2.5 and O₃ Based on Complex Network Method and Chemical Transport Model in the Yangtze River Delta, China

Does Low-Carbon City Pilot Policy Alleviate Urban Haze Pollution? Empirical Evidence from a Quasi-Natural Experiment in China

Formation of condensable organic vapors from anthropogenic and biogenic VOCs is strongly perturbed by NO<sub>x</sub> in eastern China

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Impact of air transport and secondary formation on haze pollution in the Yangtze River Delta: In situ online observations in Shanghai and Nanjing

Cited by 41 publications

References 51 publications

Regional Transport of PM2.5 and O3 Based on Complex Network Method and Chemical Transport Model in the Yangtze River Delta, China

Regional Transport of PM2.5 and O3 Based on Complex Network Method and Chemical Transport Model in the Yangtze River Delta, China

Does Low-Carbon City Pilot Policy Alleviate Urban Haze Pollution? Empirical Evidence from a Quasi-Natural Experiment in China

Formation of condensable organic vapors from anthropogenic and biogenic VOCs is strongly perturbed by NO&lt;sub&gt;x&lt;/sub&gt; in eastern China

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Regional Transport of PM_2.5 and O₃ Based on Complex Network Method and Chemical Transport Model in the Yangtze River Delta, China

Regional Transport of PM_2.5 and O₃ Based on Complex Network Method and Chemical Transport Model in the Yangtze River Delta, China

Formation of condensable organic vapors from anthropogenic and biogenic VOCs is strongly perturbed by NO<sub>x</sub> in eastern China