Analysis of the Influencing Factors and Sources of Brown Carbon Light Absorption in a Typical Megacity of the Yangtze River Delta, China DOI Creative Commons

Shanshu Xu,

Junfeng Wang, Yue’e Li

et al.

Atmosphere, Journal Year: 2024, Volume and Issue: 15(4), P. 421 - 421

Published: March 28, 2024

Brown carbon (BrC) is a new term for organic aerosol (OA) with strong absorption ability from the visible to ultraviolet (UV) wavelengths, which plays vital role in atmospheric visibility and climate change. Herein, we report field measurements 1 March 2020 28 February 2021, sampled at urban Suzhou, Yangtze River Delta (YRD), China, investigate optical properties sources of BrC. By analyzing seasonal characteristics BrC 370 nm (babs370), babs370 was found be highest (9.0 ± 7.2 Mm−1) winter lowest (5.1 3.3 summer, respectively. The Ångström exponent (AAE) value 1.22 0.05, followed by 1.21 1.20 1.19 0.05 fall, spring, mass cross-section (MAC) secondary (SOC) 0.2 m2g−1 2.9 0.1 4.3 2.8 winter, significantly lower than that primary (POC) nm, suggesting aging process could weaken light Five different factors were identified positive matrix factorization (PMF) analysis, including biomass-burning-related, vehicle-related, sulfate-related, nitrate-related, dust-related factors, on average account 7.4%, 73.4%, 11.9%, 1.9%, 5.4% babs370, Potential Source Contribution Factor (PSCF) analysis showed those high periods mainly contributed air south. Moreover, influence degree potential source areas, sequence > spring fall summer. Our results improve understanding an important industrial city YRD, reduce uncertainty prediction its effect this region.

Language: Английский

Temporal variations in black carbon in the Yangtze River Delta of China: Long-term observations and trends under different pollution processes DOI
Jiawen Ren, Honglei Wang, Yue Tan

et al.

Atmospheric Research, Journal Year: 2025, Volume and Issue: unknown, P. 108067 - 108067

Published: March 1, 2025

Language: Английский

Citations

0
Influence of Black Carbon on Measurement Errors in Scattering-Based Visibility Meters DOI Creative Commons
Zhihua Yang, Zefeng Zhang,

Hengnan Guo

et al.

Atmosphere, Journal Year: 2025, Volume and Issue: 16(4), P. 467 - 467

Published: April 17, 2025

Visibility is a fundamental meteorological parameter critical for surface transportation, aviation, maritime navigation, and weather process investigation. Scattering visibility meters are extensively utilised their simple design rapid response; however, measurement principle inherently limited, as they only quantify the scattering coefficient without assessing absorption coefficient, potentially causing errors. The World Meteorological Organisation (WMO) posits that atmospheric usually relatively small can be neglected, justifying approximation of extinction by coefficient. However, black carbon predominant light-absorbing component in atmosphere, an increase its mass concentration markedly alters considerably impacting accuracy scattering-based meters. Based on Mie theory incorporating both field observations laboratory data, we systematically examined effects interactions with other aerosol components errors Our findings revealed impact substantial, under certain conditions, particularly pronounced. This influence not dependent but also closely associated size distribution, mixing state, characteristics aerosols. Due to spatiotemporal variability these factors, uncertain. Therefore, during calibration meters, factors must considered enhance accuracy. We propose recommendations aimed at reducing improving assessments.

Language: Английский

Citations

0
Comparative assessment of acute neurotoxicity of real-world ultra-fine black carbon emitted from residential solid fuel combustion DOI
Yu Shang,

Kunming Zhao,

Wanlei Xue

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 954, P. 176597 - 176597

Published: Sept. 28, 2024

Language: Английский

Citations

2
UV Light Absorption at 370 nm by Mineral Dust, Organic Carbon, and Elemental Carbon in the Himalayas and Tibetan Plateau DOI
Chongshu Zhu, Yao Qu, Yue Zhou

et al.

Atmospheric Environment, Journal Year: 2024, Volume and Issue: 334, P. 120709 - 120709

Published: July 20, 2024

Language: Английский

Citations

1
Analysis of the Influencing Factors and Sources of Brown Carbon Light Absorption in a Typical Megacity of the Yangtze River Delta, China DOI Creative Commons

Shanshu Xu,

Junfeng Wang, Yue’e Li

et al.

Atmosphere, Journal Year: 2024, Volume and Issue: 15(4), P. 421 - 421

Published: March 28, 2024

Brown carbon (BrC) is a new term for organic aerosol (OA) with strong absorption ability from the visible to ultraviolet (UV) wavelengths, which plays vital role in atmospheric visibility and climate change. Herein, we report field measurements 1 March 2020 28 February 2021, sampled at urban Suzhou, Yangtze River Delta (YRD), China, investigate optical properties sources of BrC. By analyzing seasonal characteristics BrC 370 nm (babs370), babs370 was found be highest (9.0 ± 7.2 Mm−1) winter lowest (5.1 3.3 summer, respectively. The Ångström exponent (AAE) value 1.22 0.05, followed by 1.21 1.20 1.19 0.05 fall, spring, mass cross-section (MAC) secondary (SOC) 0.2 m2g−1 2.9 0.1 4.3 2.8 winter, significantly lower than that primary (POC) nm, suggesting aging process could weaken light Five different factors were identified positive matrix factorization (PMF) analysis, including biomass-burning-related, vehicle-related, sulfate-related, nitrate-related, dust-related factors, on average account 7.4%, 73.4%, 11.9%, 1.9%, 5.4% babs370, Potential Source Contribution Factor (PSCF) analysis showed those high periods mainly contributed air south. Moreover, influence degree potential source areas, sequence > spring fall summer. Our results improve understanding an important industrial city YRD, reduce uncertainty prediction its effect this region.

Language: Английский

Citations

0