Significant Contribution of Coarse Black Carbon Particles to Light Absorption in North China Plain

Wang, Jiandong; Wang, Jiaping; Yang, Hua; Liu, Chao; Cai, Jing; Tian, Hezhong; Xu, Xiaoqi; Jiang, Shengyao; Zheng, Guangjie; Jiang, Jingkun; Cai, Runlong; Zhou, Wei; Chen, Ganzhen; Jin, Yuzhi; Zhang, Qiang; Hao, Jiming

doi:10.1021/acs.estlett.1c00953

Cited by 11 publications

(7 citation statements)

References 40 publications

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“…As a result, there is an underestimation of the rBC mass [ 31 ]. For instance, Wang et al [ 164 ] demonstrated that the LII instrument significantly underestimates (>50%) the mass of larger-sized BC particles (>1 μm) in PM 10 . Apart from the limitations in particle size detection imposed by technical constraints, uncertainties also arise from the selection of calibration materials and the mass loss correction scheme employed in the LII technique.…”

Section: Refractory Black Carbonmentioning

confidence: 99%

The Measurement of Atmospheric Black Carbon: A Review

Zhang,

Cheng,

Liang

et al. 2023

Toxics

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Black Carbon (BC), the second-largest contributor to global warming, has detrimental effects on human health and the environment. However, the accurate quantification of BC poses a significant challenge, impeding the comprehensive assessment of its impacts. Therefore, this paper aims to critically review three quantitative methods for measuring BC: Thermal Optical Analysis (TOA), the Optical Method, and Laser-Induced Incandescence (LII). The determination principles, available commercial instruments, sources of deviation, and correction approaches associated with these techniques are systematically discussed. By synthesizing and comparing the quantitative results reported in previous studies, this paper aims to elucidate the underlying relationships and fundamental disparities among Elemental Carbon (EC), Equivalent Black Carbon (eBC), and Refractory Black Carbon (rBC). Finally, based on the current advancements in BC quantification, recommendations are proposed to guide future research directions.

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Section: Refractory Black Carbonmentioning

confidence: 99%

The Measurement of Atmospheric Black Carbon: A Review

Zhang,

Cheng,

Liang

et al. 2023

Toxics

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“…R 2 decreased to 0.2 between m eBC,bulk,AAC−AE33,720−1500 and m rBC,bulk,DMA−SP2,200−720 , indicating these two size ranges were not well related, and both of them needed to be measured independently. Observation by transmission electron microscopy showed that these larger BC-containing particles could be coated with massive materials from secondary processes or super-aggregated BC with a fractal BC structure (Wang et al, 2022). The mean m eBC,bulk,AAC−AE33,720−1500 was 0.2 ± 0.2 µg m −3 , indicating that the DMA-SP2 overall underestimated m BC,bulk for ∼ 0.2 µg m −3 (∼ 33 %) in this field measurement considering that the DMA-SP2 did not measure BCMSD larger than 720 nm.…”

Section: Ebc Mass Size Distribution Measured By the Aerodynamic Aeros...mentioning

confidence: 99%

“…Characteristics of larger-coverage BCMSD during atmospheric aging were still unclear. Wang et al (2022) showed that BC larger than 1 µm could contribute to as large as 50 % of m BC,bulk , highlighting the importance of largercoverage BCMSD. Therefore, it was imperative to measure larger-coverage BCMSD with a higher time resolution.…”

Section: Introductionmentioning

confidence: 98%

New method to determine black carbon mass size distribution

Zhao

Guo

et al. 2022

Atmos. Meas. Tech.

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Abstract. Black carbon (BC) is an important atmospheric component with strong light absorption. Many attempts have been made to measure BC mass size distribution (BCMSD) for its significant impact on climate and public health. Larger-coverage BCMSD, ranging from upper submicron particles sizes to larger than 1 µm, contributes to a substantial proportion of total BC mass and absorption. However, the current time resolution of larger-coverage BCMSD measurement was limited to 1 d, which was insufficient to characterize variation of larger-coverage BCMSD. In this study, a new method to determine equivalent BCMSD (eBCMSD) was proposed from size-resolved absorption coefficient measured by an aerodynamic aerosol classifier in tandem with an aethalometer. The proposed method could measure larger-coverage eBCMSD with a time resolution as high as 1 h and was validated by comparing the measurement results with refractory BCMSD (rBCMSD) measured by a differential mobility analyzer in tandem with a single-particle soot photometer (DMA–SP2) for particle sizes larger than 300 nm during a field measurement in the Yangtze River Delta. Bulk refractory BC mass concentration (mrBC,bulk) by DMA–SP2 was underestimated by 33 % compared to bulk equivalent BC mass concentration (meBC,bulk) by this method because of the limited size range of measurement for DMA–SP2. Uncertainty analysis of this method was performed with respect to mass absorption cross-section (MAC), transfer function inversion, number fraction of BC-containing particle and instrumental noise. The results indicated that MAC was the main uncertainty source, leading to meBC,bulk values that varied from −20 % to 28 %. With the advantage of a wide size coverage up to 1.5 µm, high time resolution, easy operation and low cost, this method is expected to have wide applications in field measurement for better estimating the radiative properties and climate effects of BC.

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“…Carbonaceous aerosols impact the radiative forcing of the atmosphere. − However, the heterogeneous nature of carbonaceous aerosols can make source identification and assessments of their contributions to radiative forcing challenging. , The δ 13 C signature of carbonaceous aerosols can be used for source apportionment, , if the δ 13 C values of both aerosol samples and potential emission sources are defined. Crude oil, coal, biomass, and their combustion products are potential sources of carbonaceous aerosols.…”

Section: Introductionmentioning

confidence: 99%

Stable Carbon Isotope Signatures of Carbonaceous Aerosol Endmembers in the Tibetan Plateau

Zhang,

Liu,

Kang

et al. 2024

Environ. Sci. Technol.

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Carbonaceous aerosols play an important role in radiative forcing in the remote and climate-sensitive Tibetan Plateau (TP). However, the sources of carbonaceous aerosols to the TP remain poorly defined, in part due to the lack of regionally relevant data about the sources of carbonaceous aerosols. To address this knowledge gap, we present the first comprehensive analysis of the δ13C signatures of carbonaceous aerosol endmembers local to the TP, encompassing total carbon, water-insoluble particle carbon, and elemental carbon originating from fossil fuel combustion, biomass combustion, and topsoil. The δ13C signatures of these local carbonaceous endmembers differ from components collected in other regions of the world. For instance, fossil fuel-derived aerosols from the TP were 13C-depleted relative to fossil fuel-derived aerosols reported in other regions, while biomass fuel-derived aerosols from the TP were 13C-enriched relative to biomass fuel-derived aerosols reported in other regions. The δ13C values of fine-particle topsoil in the TP were related to regional variations in vegetation type. These findings enhance our understanding of the unique features of carbonaceous aerosols in the TP and aid in accurate source apportionment and environmental assessments of carbonaceous aerosols in this climate-sensitive region.

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Significant Contribution of Coarse Black Carbon Particles to Light Absorption in North China Plain

Cited by 11 publications

References 40 publications

The Measurement of Atmospheric Black Carbon: A Review

The Measurement of Atmospheric Black Carbon: A Review

New method to determine black carbon mass size distribution

Stable Carbon Isotope Signatures of Carbonaceous Aerosol Endmembers in the Tibetan Plateau

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