Light absorption properties of black and brown carbon in winter over the North China Plain: Impacts of regional biomass burning

Li, Xingru; Sun, Ningning; Jin, Qiong-Hua; Zhao, Zhengyu; Wang, Lili; Wang, Qinglu; Gu, Xin; Li, Yuxia; Liu, Xingang

doi:10.1016/j.atmosenv.2022.119100

Cited by 11 publications

(5 citation statements)

References 65 publications

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“…It is evident that the Abs value is highest at 370 nm and decreases as the wavelength increases. This trend has been confirmed in numerous previous studies [ 11 , 22 ]. The average absorption coefficients for the seven wavelengths were as follows: 38.34 ± 33.39 Mm −1 (370 nm), 27.33 ± 22.66 Mm −1 (470 nm), 22.51 ± 8.05 Mm −1 (520 nm), 17.89 ± 13.12 Mm −1 (590 nm), 15.69 ± 11.52 Mm −1 (660 nm), 11.1 ± 8.17 Mm −1 (880 nm) and 10.28 ± 7.52 Mm −1 (950 nm), respectively.…”

Section: Resultssupporting

confidence: 89%

“…AAEBC refers to the Ångström index, which characterizes the spectral dependence of BC. In this study, a value of 1.1 was employed based on previous research [ 11 ].…”

Section: Methodsmentioning

confidence: 99%

“…Similarly, Barman and Gokhale [ 10 ] used BC data obtained from 2016 to 2017 in Guwahati, India, to study the deposition of BC concentration under different meteorological conditions, and applied the mixed single-particle Lagrangian integral trajectory (HYSPLIT) model to analyze the area and source distribution of BC possible deposition. Furthermore, Li et al [ 11 ] conducted continuous BC and BrC measurements during the heating season in Beijing. They employed trajectory calculations via the HYSPLIT model and employed the Concentration-Weighted Trajectory (CWT) model, as well as the MODIS fire point map, to analyze potential pollution sources.…”

Section: Introductionmentioning

confidence: 99%

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Pollution Characteristics and Source Apportionment of Black Carbon Aerosols during Spring in Beijing

Lei,

Li,

Yin

et al. 2024

Toxics

Self Cite

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Black carbon (BC) aerosols are important for absorbing aerosols, affecting global climate change and regional air quality, and potentially harming human health. From March to May 2023, we investigated black carbon aerosol levels and air pollution in Beijing. Employing methods such as linear regression, Potential Source Contribution Function (PSCF) and Concentration-Weighted Trajectory (CWT), we analyzed the characteristics and sources of black carbon aerosols in the region. Results indicate that the light absorption coefficients of BC and BrC decrease with increasing wavelength, with BrC accounting for less than 40% at 370 nm. Daily variations in BC and PM2.5 concentrations exhibit similar trends, peaking in March, and BC displays a distinct bimodal hourly concentration structure during this period. Aethalometer model results suggest that liquid fuel combustion contributes significantly to black carbon (1.08 ± 0.71 μg·m−3), surpassing the contribution from solid fuel combustion (0.31 ± 0.2 μg·m−3). Furthermore, the significant positive correlation between BC and CO suggests that BC emissions in Beijing predominantly result from liquid fuel combustion. Potential source area analysis indicates that air masses of spring in Beijing mainly originate from the northwest (40.93%), while potential source areas for BC are predominantly distributed in the Beijing–Tianjin–Hebei region, as well as parts of the Shandong, Shanxi and Henan provinces. Moreover, this study reveals that dust processes during spring in Beijing have a limited impact on black carbon concentrations. This study’s findings support controlling pollution in Beijing and improving regional air quality.

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Section: Resultssupporting

confidence: 89%

“…AAEBC refers to the Ångström index, which characterizes the spectral dependence of BC. In this study, a value of 1.1 was employed based on previous research [ 11 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pollution Characteristics and Source Apportionment of Black Carbon Aerosols during Spring in Beijing

Lei,

Li,

Yin

et al. 2024

Toxics

Self Cite

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“…This is understandable since the burning of high-polluting fuels has been phased out in urban Beijing by the People's Government of Beijing Municipality since 2014 (Municipality, 2014). Although large particles in urban Beijing could be influenced by biomass burning and coal combustion through transport from surrounding regions (Li et al, 2022b;Sun et al, 2015;Zhang et al, 2013;Zhang et al, 2008), UFPs could hardly survive after long-distance transport due to their short lifetime.…”

Section: Sources Of Ufp Organics and Their Seasonal Variabilitiesmentioning

confidence: 99%

Seasonal variations in composition and sources of atmospheric ultrafine particles in urban Beijing based on near-continuous measurements

Chen

et al. 2023

Preprint

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Abstract. Understanding the composition and sources of atmospheric ultrafine particles (UFPs) is essential in evaluating their exposure risks. It requires long-term measurements with high time resolution, which are to date scarce. We performed near-continuous measurements of UFP composition during four seasons in urban Beijing using a thermal desorption chemical ionization mass spectrometer, accompanied by real-time size distribution measurements. We found that UFPs in urban Beijing are dominated by organic components, varying seasonally from 68 to 81 %. CHO organics are the most abundant in summer, while sulfur-containing organics, some nitrogen-containing organics, nitrate, and chloride are the most abundant in winter. With the increase of particle diameter, the contribution of CHO organics decreases, while that of sulfur-containing and nitrogen-containing organics, nitrate, and chloride increase. Source apportionment analysis of the UFP organics indicates contributions from cooking and vehicle sources, photooxidation sources enriched in CHO organics, and aqueous/heterogeneous sources enriched in nitrogen- and sulfur-containing organics. The increased contributions of cooking, vehicle, and photooxidation components are usually accompanied by simultaneous increases in UFP number concentrations related to cooking emission, vehicle emission, and new particle formation, respectively. While the increased contribution of the aqueous/heterogeneous composition is usually accompanied by the growth of UFP mode diameters. The highest UFP number concentrations in winter are due to the strongest new particle formation, the strongest local primary particle number emissions, and the slowest condensational growth of UFPs to larger sizes. This study provides a comprehensive understanding of urban UFP composition and sources and offers valuable datasets for the evaluation of UFP exposure risks.

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“…In addition, Xiao et al (2020) reported that biomass burning sources, especially residential biofuel, can contribute to increased urban NH 3 emissions. Several studies have also indicated that biomass burning is an important source of light-absorbing components in Xi'an (Zhang et al, 2020;Yuan et al, 2021;Zhang et al, 2021b;Li et al, 2022b). Wu et al (2018) revealed that simultaneously elevated RH and anthropogenic secondary inorganic aerosol (SIA) resulted in an abundant aerosol liquid water content (ALWC), which can further facilitate the formation of heavy haze.…”

Section: Introductionmentioning

confidence: 99%

Measurement report: Large contribution of biomass burning and aqueous-phase processes to the wintertime secondary organic aerosol formation in Xi'an, Northwest China

Duan

Huang

et al. 2022

Atmos. Chem. Phys.

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Abstract. Secondary organic aerosol (SOA) plays an important role in particulate air pollution, but its formation mechanism is still not fully understood. The chemical composition of non-refractory particulate matter with a diameter ≤2.5 µm (NR-PM2.5), OA sources, and SOA formation mechanisms were investigated in urban Xi'an during winter 2018. The fractional contribution of SOA to total OA mass (58 %) was larger than primary OA (POA, 42 %). Biomass-burning-influenced oxygenated OA (OOA-BB) was resolved in urban Xi'an and was formed from the photochemical oxidation and aging of biomass burning OA (BBOA). The formation of OOA-BB was more favorable on days with a larger OA fraction and higher BBOA concentration. In comparison, the aqueous-phase processed oxygenated OA (aq-OOA) was more dependent on the secondary inorganic aerosol (SIA) content and aerosol liquid water content (ALWC), and it showed a large increase (to 50 % of OA) during SIA-enhanced periods. Further van Krevelen (VK) diagram analysis suggests that the addition of carboxylic acid groups with fragmentation dominated OA aging on reference days, while the increased aq-OOA contributions during SIA-enhanced periods likely reflect OA evolution due to the addition of alcohol or peroxide groups.

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Light absorption properties of black and brown carbon in winter over the North China Plain: Impacts of regional biomass burning

Cited by 11 publications

References 65 publications

Pollution Characteristics and Source Apportionment of Black Carbon Aerosols during Spring in Beijing

Pollution Characteristics and Source Apportionment of Black Carbon Aerosols during Spring in Beijing

Seasonal variations in composition and sources of atmospheric ultrafine particles in urban Beijing based on near-continuous measurements

Measurement report: Large contribution of biomass burning and aqueous-phase processes to the wintertime secondary organic aerosol formation in Xi'an, Northwest China

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