
npj Climate and Atmospheric Science, Journal Year: 2025, Volume and Issue: 8(1)
Published: May 27, 2025
Language: Английский
npj Climate and Atmospheric Science, Journal Year: 2025, Volume and Issue: 8(1)
Published: May 27, 2025
Language: Английский
The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 801, P. 149739 - 149739
Published: Aug. 20, 2021
Language: Английский
Citations
73Journal of Geophysical Research Atmospheres, Journal Year: 2022, Volume and Issue: 127(16)
Published: Aug. 9, 2022
Abstract Brown carbon (BrC) has been recognized as an important contributor to global warming due its absorption of solar radiation with strong wavelength dependence. While early studies mostly consider biomass burning a major emission source, few recent have suggested coal combustion and vehicle exhaust contributors BrC emissions. Considering dominant consumption, large residential biofuel usage, the increasing number vehicles, pollution could result in remarkable regional climate effects China. This study gives overview sources, chemical composition properties BrC, focusing on categorization measurement techniques. The basic features China, including surface concentrations, column burden, sources associated absorbing are then summarized compared other countries. emissions well optical at 365 nm from primary China also provide more straightforward understanding light‐absorbing With detailed comparison existing publications, deeper insight into uncertainties measurements will improve effect BrC. review recommends key research areas for further investigation future.
Language: Английский
Citations
61Environment International, Journal Year: 2022, Volume and Issue: 165, P. 107344 - 107344
Published: June 11, 2022
Atmospheric PAHs (polycyclic aromatic hydrocarbons) and their derivatives are a global concern that influences environments threatens human health. Concentrations of 52 the main in six Chinese megacities were measured winter 2019. The concentrations ∑PAHs (sum PAHs) ranged from 19.42 ± 7.68 to 65.40 29.84 ng m-3, with significantly higher levels northern cities (Harbin [HB], Beijing [BJ], Xi'an [XA]) than southern ones (Wuhan [WH], Chengdu [CD] Guangzhou [GZ]). Source apportionment was conducted by PMF model results showed coal combustion traffic emissions two dominant sources, which dominated cities, respectively. Biomass burning also characterized as crucial source extremely high contributions XA (42.5%). Assisted individual PAH results, source-depend TEQ (total BaP equivalent) incremental lifetime cancer risk (ILCR) firstly reported these cities. highlighted biomass both ILCR, underestimated apportionment. Secondary organic aerosol-derived demonstrated increase compared fresh three parameters, namely temperature, relative humidity, O3 multiple linear regression principal factors influencing secondary reactions winter. This study provides accurate health-orientated potential control measures mitigate toxicity formed PAHs, decrease uncertainty level traditional methods. revealed great progress air pollution government past 20 years, but still long way go formulate strict emission strategies environmental health-protective perspectives.
Language: Английский
Citations
56The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 823, P. 153717 - 153717
Published: Feb. 8, 2022
Language: Английский
Citations
43The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 860, P. 160434 - 160434
Published: Nov. 24, 2022
Language: Английский
Citations
41Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown
Published: Feb. 23, 2024
Particulate brown carbon (BrC) plays a crucial role in the global radiative balance due to its ability absorb light. However, effect of molecular formation on light absorption properties BrC remains poorly understood. In this study, atmospheric samples collected from six Chinese megacities winter and summer were characterized through ultrahigh-performance liquid chromatography coupled with Orbitrap mass spectrometry (UHPLC-Orbitrap MS) measurements. The average values coefficient at wavelength 365 nm (babs365) approximately 4.0 times higher than those summer. Nitrogen-containing organic molecules (CHNO) identified as critical components light-absorbing substances both seasons, underscoring importance N-addition BrC. These nitrogen-containing chromophores more closely related nitro-containing compounds originating biomass burning nitrogen oxides (NOx)/nitrate (NO3–) reactions winter. summer, they reduced N-containing formed ammonia (NH3)/ammonium (NH4+) reactions. NH3/NH4+-mediated contributed secondary winter, particularly southern cities. Compared O/Cw, lower molecule conjugation indicator (double bond equivalent, DBE), babs365 suggest possible bleaching mechanism during oxidation process. findings strengthen connection between composition BrC, providing insights into mechanisms across northern cities different seasons.
Language: Английский
Citations
10Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 489, P. 137530 - 137530
Published: Feb. 8, 2025
Language: Английский
Citations
1Atmospheric Research, Journal Year: 2025, Volume and Issue: unknown, P. 108163 - 108163
Published: April 1, 2025
Language: Английский
Citations
1The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 806, P. 150570 - 150570
Published: Sept. 27, 2021
Language: Английский
Citations
37Atmospheric Environment, Journal Year: 2023, Volume and Issue: 309, P. 119909 - 119909
Published: June 15, 2023
Language: Английский
Citations
15