Observations of ozone vertical profiles and corresponding precursors in the low troposphere in Beijing, China

Chi, Xiaowei; Liu, Cheng; Xie, Zhouqing; Fan, G. J.; Wang, Yang; He, Pengzhen; Fan, Shidong; Hong, Qianqian; Wang, Zhuang; Yu, Xiangyao; Yue, Fange; Duan, Jianbo; Zhang, Pengfei; Liu, Jianguo

doi:10.1016/j.atmosres.2018.06.012

Cited by 49 publications

(23 citation statements)

References 56 publications

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“…The surface result is consistent with previous studies. In addition, similar to this study, the transition and NO x -limited regimes also existed at high altitudes in Beijing (Chen et al, 2013;Chi et al, 2018 Lee et al (1995) Pinnacles, Virginia, USA Rural Autumn 0.045 Munger et al (1995) Pabstthum, Germany Rural Summer 0.012 Moortgat et al (2002) Goldlauter, Germany Rural Autumn 0.058 Müeller et al (2006) Sao Paulo, Brazil Urban Summer 0.092 Grosjean et al (1990) Los Angeles, USA Urban Summer 0.137 Grosjean et al (1996) Urban Autumn 0.3 Kawamura et al (2000) Ponderosa forests, USA Forest Summer <2 or >2.5 depends on BVOC and AVOC DiGangi et al 2012Xingtai, China Suburban Summer 0.025 Wang et al (2019) This study Suburban Autumn 0.060…”

Section: R Fn and Ozone Formationsupporting

confidence: 87%

“…The models also demonstrated that HCHO/NO 2 ( R FN ) is a robust predictor of the simulated near‐surface O 3 production regime (Jin et al., 2017). According to the measurements results of MAX‐DOAS and lidar measurements, the ozone formation is mainly controlled by VOC‐limited regime in the 300–700 m layer, whereas the transition regime became more prevalent at higher altitudes observed in Beijing (Chi et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

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Investigating the Sources of Formaldehyde and Corresponding Photochemical Indications at a Suburb Site in Shanghai From MAX‐DOAS Measurements

et al. 2021

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Multi-AXis-Differential Optical Absorption Spectroscopy (MAX-DOAS) is a state-of-the-art ground-based remote sensing technique used for deriving vertical profiles of aerosol extinction coefficient and many other atmospheric trace gases from spectra of scattered sunlight recorded at multiple elevation angles (Bobrowski et al., 2003; Hönninger et al., 2004; Wagner et al., 2004; Wittrock et al., 2004). The low cost, automatic operation, and the availability of vertical profiles are the advantages of this instrument for a better way in longterm observations. MAX-DOAS measurement has been widely used for the observations of trace gases such as nitrogen dioxide (NO 2), sulfur dioxide (SO 2), nitrous acid (HONO), formaldehyde (HCHO) and glyoxal (CHOCHO) in China during the last decade (

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Section: R Fn and Ozone Formationsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Investigating the Sources of Formaldehyde and Corresponding Photochemical Indications at a Suburb Site in Shanghai From MAX‐DOAS Measurements

et al. 2021

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“…Brown carbon (BrC), as a fraction of organic aerosols with effective light absorption properties, has been a research hotspot in the atmospheric carbonaceous aerosols field (Andreae and Gelencser, 2006;Laskin et al, 2015;Yan et al, 2018). BrC strongly absorbs solar radiation at short ultraviolet-visible wavelengths, which has been estimated to contribute 6 %-28 % of the total atmospheric aerosol absorp-tion (Chen et al, 2018;Chung et al, 2012;Feng et al, 2013;Liu et al, 2015). Owing to its significant effect on light absorption, BrC can affect both direct radiative forcing and atmospheric photochemistry (Mok et al, 2016;Jo et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The heterogeneous oxidations are also important pathways to form or bleach BrC, which have been widely studied for the aging of soot and individual organic compounds by OH, O 3 , NO x , SO 2 , and HONO (Baduel et al, 2011;Gallimore et al, 2011;He et al, 2017;Li et al, 2013Li et al, , 2017Pillar-Little and Guzman, 2018, and references therein). Among them, the O 3 aging simulations have been widely conducted, mainly because of O 3 is not only a significant pollutant but also an important oxidant in the atmosphere (Chapleski et al, 2016;Chi et al, 2018;Li et al, 2018). The O 3 oxidation of soot particles generally changes their physicochemical properties (i.e., water solubility, hygroscopicity, size, oxidative potential, and morphology), as well as forms new chromophoric compounds (Decesari et al, 2002;Li et al, 2013;Zhu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

The evolutionary behavior of chromophoric brown carbon during ozone aging of fine particles from biomass burning

Fan

Cao

et al. 2020

Atmos. Chem. Phys.

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Abstract. Biomass burning (BB) emits large amounts of brown carbon (BrC); however, the evolutionary behavior of BrC in BB emissions (BB BrC) resulting from complex atmospheric processes is poorly understood. In this study, the transformation of contents and the chromophoric characteristics of BrC in smoke particles emitted by the burning of rice straw (RS), corn straw (CS), and pinewood (PW) under O3 aging are investigated. The O3 aging induced the reduction of light absorption and fluorescence for the BB BrC, suggesting the decomposition of chromophores and fluorophores. These changes were accompanied by a decrease in aromaticity, average molecular weight, and the light absorption capacity for the chromophores, as well as an increase in humification for the fluorophores. The excitation emission matrix combined with a parallel factor analysis revealed that protein-like components (C3) were predominantly decomposed by O3 aging, while the relative distribution of a humic-like component with highly oxygenated chromophores (C4) gradually increased. In general, the humic-like substances (C1 + C2 + C4) were transformed to be the most abundant fluorophores for all the BB BrC samples, which accounted for 84 %–87 % of the total fluorophores in final O3-aged BB BrC. Two-dimensional correlation spectroscopy (2D-COS) was performed on the synchronous fluorescence, which suggested that the RS and CS BrC exhibits the same susceptible fluorophores changes upon O3 aging. It showed that O3 firstly reacted with protein-like fractions (263–289 nm) and then with fulvic-like fractions (333–340 nm). In comparison, the changing sequence of susceptible fluorophores in the PW BrC to O3 was in the order of fulvic-like fluorophores with shorter wavelengths (309 nm), protein-like fluorophores (276 nm), and fulvic-like fluorophores with longer wavelengths (358 nm). The 2D-FTIR-COS (2D-COS combined with FTIR) analysis showed conjugated C=O and aromatic C=C and C=O groups were the most susceptible functional groups to O3 aging for all BB BrC. Moreover, it also revealed a consistent sequential change, which is in the order of aromatic OH; conjugated C=O groups and aromatic C=O; aromatic COO−; and finally lignin-derived C–C, C–H, and C–O groups. Our results provide new insights into the evolutionary behavior of the chromophoric and fluorescent properties of BB BrC during O3 aging, which are of great significance for better understanding the heterogeneous oxidation pathways of BB-derived BrC in the atmospheric environment.

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“…To infer the influence of precursors on O3, linear regression was executed for precursors observed by LP-DOAS and O3 concentration. O3 formation regime was discerned by comparing the slopes versus HCHO and NO2 (O3-HCHO and O3-NO2: both positive reflect transition regime; positive and negative means VOC-limited; negative and positive suggests NOx-limited; both negative indicates titration of O3 by NO and classified as VOC-limited ) (Su et al, 2017;Chi et al, 2018). In several months, LP-DOAS observation indicated VOC-limited or transition regime, while the FNRSAT reflected transition or NOx-limited regime, which mainly related to the high level of FNR at the overpass time of OMI.…”

Section: Correction Of Fnrsatmentioning

confidence: 99%

OMI-observed HCHO in Shanghai, China during 2010–2019 and ozone sensitivity inferred by improved HCHO / NO<sub>2</sub> ratio

Wang

Xue

et al. 2021

Preprint

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Abstract. In recent years, satellite remote sensing has been increasingly used in the long-term observation of ozone (O3) precursors and its formation regime. In this work, formaldehyde (HCHO) data from Ozone Monitoring Instrument (OMI) were used to analyse the temporal and spatial distribution of HCHO vertical column densities (VCDs) in Shanghai from 2010 to 2019. HCHO VCDs exhibited the highest value in summer and the lowest in winter, the high-VCD concentrated in western Shanghai. Temperature largely influence HCHO by affecting the biogenic emissions and photochemical reactions, and industry was the major anthropogenic source. The satellite observed formaldehyde to nitrogen dioxide ratio (FNRSAT) reflects that the O3 formation regime had significant seasonal characteristics and gradually manifested as transitional ozone formation regime dominated in Shanghai. The uneven distribution in space was mainly reflected as the higher FNRSAT and surface O3 concentration in rural area. To compensate the shortcoming of FNRSAT that it can only characterize O3 formation around satellite overpass time, correction of FNRSAT was implemented with hourly surface FNR and O3 data. After correction, O3 formation regime showed the trend moving towards VOC-limited in both time and space, and regime indicated by FNRSAT can better reflect O3 formation for a day. This study can help us better understand HCHO characteristics and O3 formation regime in Shanghai, and also provide a method to improve FNRSAT for characterizing O3 formation in a day, which will be significant for developing O3 prevention and control strategies.

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Observations of ozone vertical profiles and corresponding precursors in the low troposphere in Beijing, China

Cited by 49 publications

References 56 publications

Investigating the Sources of Formaldehyde and Corresponding Photochemical Indications at a Suburb Site in Shanghai From MAX‐DOAS Measurements

Investigating the Sources of Formaldehyde and Corresponding Photochemical Indications at a Suburb Site in Shanghai From MAX‐DOAS Measurements

The evolutionary behavior of chromophoric brown carbon during ozone aging of fine particles from biomass burning

OMI-observed HCHO in Shanghai, China during 2010–2019 and ozone sensitivity inferred by improved HCHO / NO<sub>2</sub> ratio

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Observations of ozone vertical profiles and corresponding precursors in the low troposphere in Beijing, China

Cited by 49 publications

References 56 publications

Investigating the Sources of Formaldehyde and Corresponding Photochemical Indications at a Suburb Site in Shanghai From MAX‐DOAS Measurements

Investigating the Sources of Formaldehyde and Corresponding Photochemical Indications at a Suburb Site in Shanghai From MAX‐DOAS Measurements

The evolutionary behavior of chromophoric brown carbon during ozone aging of fine particles from biomass burning

OMI-observed HCHO in Shanghai, China during 2010–2019 and ozone sensitivity inferred by improved HCHO / NO&lt;sub&gt;2&lt;/sub&gt; ratio

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Product

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OMI-observed HCHO in Shanghai, China during 2010–2019 and ozone sensitivity inferred by improved HCHO / NO<sub>2</sub> ratio