Vertical distributions of tropospheric formaldehyde, nitrogen dioxide, ozone and aerosol in southern China by ground-based MAX-DOAS and LIDAR measurements during PRIDE-GBA 2018 campaign

Luo, Yuhan; Dou, Kai; Fan, G. J.; Huang, Shan; Si, Fuqi; Zhou, Haijin; Wang, Yujun; Pei, Chenglei; Tang, Fuying; Yang, Dongshang; Xi, Liang; Yang, T.; Liu, Wenqing

doi:10.1016/j.atmosenv.2020.117384

Cited by 37 publications

(16 citation statements)

References 33 publications

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“…It has been observed that NO can play an important role in the mechanism for the production of O 3 and HCHO (see reactions ( 3) and ( 8)), but HCHO can also be formed in the absence of NO. When NO concentrations are low, peroxy radicals (RO 2 •) can react with other RO 2 • radicals to produce alkoxy radicals (RO•), a product similar to what are produced by the reaction of RO 2 • + NO (reaction (8)). This leads to similar product branching ratios and products formed as under high NO x conditions, but without O 3 formation because the needed NO is missing from the mechanism defined by reactions (1)-( 5), specifically reaction (3).…”

Section: Relationship Between Formaldehyde and Omentioning

confidence: 99%

“…Its photolysis is a source of both OH and HO 2 radicals, which both serve to drive tropospheric O 3 formation. As a result of HCHO's carcinogenic nature and role in tropospheric ozone formation, a wealth of research has been done to better elucidate sources of formaldehyde [8][9][10][11][12]. HCHO can be directly emitted into the atmosphere from both anthropogenic and biogenic sources.…”

Section: Introductionmentioning

confidence: 99%

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Sources of Formaldehyde in Bountiful, Utah

et al. 2021

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The U.S Environmental Protection Agency’s National Air Toxics Trends Stations Network has been measuring the concentration of hazardous air pollutants (HAPs) including formaldehyde (HCHO) since 2003. Bountiful, Utah (USA) has served as one of the urban monitoring sites since the network was established. Starting in 2013, the mean concentration of HCHO measured in Bountiful, Utah exceeded the non-cancer risk threshold and the 1 in 1 million cancer risk threshold. In addition, the measured concentrations were more than double those found at surrounding locations in Utah. A Positive Matrix Factorization (PMF) analysis using PMF-EPA v5 was performed using historical data (2004–2017) to better understand the sources of formaldehyde in the region. The historical data set included samples that were collected every sixth day on a 24 h basis. Beginning in February 2019 an eight-week air sampling campaign was initiated to measure formaldehyde on a two-hour averaged basis. In addition, the measurements of O3, NO, NO2, benzene, toluene, ethylbenzene, and xylenes (BTEX) were also collected. Corresponding back-trajectory wind calculations for selected time periods were calculated to aid in the understanding of the effects of BTEX emission sources and formaldehyde formation. The results indicate that the principal formaldehyde sources are associated with biomass burning and the conversion of biogenic emissions into HCHO. Back-trajectory wind analysis of low (≤3 ppbv) and high (23.8–32.5 ppbv) HCHO cases show a clear dominance of high HCHO originating in trajectories that come from the southwest and pass over the area of the oil refineries and industrial sources in the north Salt Lake City area.

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Section: Relationship Between Formaldehyde and Omentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sources of Formaldehyde in Bountiful, Utah

et al. 2021

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“…From below 0.1–0.3 km, NO 2 concentration showed a significant downward trend: The average NO 2 concentrations under 0.1 km, 0.2 km, and 0.3 km were 34.4 μg/m 3 , 26.74 μg/m 3 , and 16.56 μg/m 3 , respectively. The concentration of NO 2 below 0.1 km was 2.1 times the concentration of NO 2 at 0.3 km, which indicated that the pollution mainly came from industrial emissions and other near‐surface emissions (Luo et al., 2020). At these three heights, the average ozone concentrations were 141.16 μg/m 3 , 163.03 μg/m 3 , and 178.08 μg/m 3 , respectively; the ozone concentration at each height increased by about 20 μg/m 3 .…”

Section: Resultsmentioning

confidence: 99%

Characteristics and Source Apportionment of the Vertical Distribution of Ozone at a Site of the Pearl River Delta Region of China

Wang

Yan

Liu³

et al. 2021

Earth and Space Science

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Ozone pollution adversely affects human health. In recent years, ozone pollution has become an important research topic and a challenge. By combining differential absorption lidar (DIAL), meteorological gradient tower data, the Weather Research and Forecasting (WRF) model, and the backward trajectories model, changes in vertical ozone concentration, the influencing factors on ozone vertical distribution, and ozone sources were analyzed in Shenzhen from September 20 to 30, 2019.Results indicated that from September 25 to 30, there was obvious residual ozone and transport at night. The analysis of ozone concentration and meteorological factors shows that the temperatures of 291.3-301.8 K and the humidity of 19.4%-71.6% were conducive to ozone formation. As height increased from less than 0.1 km to 0.3 km, the average ozone concentration increased, and the average NO2 concentration decreased. The analysis of potential ozone sources showed that ozone was mainly transported from the northeast of China and that the highest concentration of ozone mainly comes from southeast of Jiangxi province in southeastern China.

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“…As one of the most detrimental air pollutants, tropospheric ozone (O 3 ) levels have increased by 30%–70% in the midlatitude region of the Northern Hemisphere since the mid‐20th century (IPCC, 2021). Although O 3 is declining in some urban areas of Europe and the United States due to effective control measures of O 3 ‐precursor emissions, ground O 3 levels still maintain a rising trend globally according to monitoring site data (Chang et al, 2017; Luo et al, 2020; Saitanis et al, 2015; Sicard et al, 2013). Because of its strong phytotoxicity, tropospheric O 3 damages plants when its concentration exceeds the species‐specific threshold for a long period of time (Agathokleous et al, 2016; Feng et al, 2015; Li et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Elevated ozone decreases the multifunctionality of belowground ecosystems

Wang

2022

Global Change Biology

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As one of the most detrimental air pollutants, tropospheric ozone (O 3 ) levels have increased by 30%-70% in the midlatitude region of the Northern Hemisphere since the mid-20th century (IPCC, 2021).Although O 3 is declining in some urban areas of Europe and the United States due to effective control measures of O 3 -precursor emissions, ground O 3 levels still maintain a rising trend globally according to monitoring site data (

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Vertical distributions of tropospheric formaldehyde, nitrogen dioxide, ozone and aerosol in southern China by ground-based MAX-DOAS and LIDAR measurements during PRIDE-GBA 2018 campaign

Cited by 37 publications

References 33 publications

Sources of Formaldehyde in Bountiful, Utah

Sources of Formaldehyde in Bountiful, Utah

Characteristics and Source Apportionment of the Vertical Distribution of Ozone at a Site of the Pearl River Delta Region of China

Elevated ozone decreases the multifunctionality of belowground ecosystems

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