Nonlinear enhancement of radiative absorption by black carbon in response to particle mixing structure

Yuanyuan Wang; Weijun Li; Jin Huang; Lei Liu; Yuner Pang; Cenlin He; Fengshan Liu; Dantong Liu; Lei Bi; Xiaoye Zhang; Zongbo Shi

doi:10.1029/2021GL096437

Nonlinear enhancement of radiative absorption by black carbon in response to particle mixing structure

Yuanyuan Wang, Weijun Li^*, Jin Huang, Lei Liu, Yuner Pang, Cenlin He, Fengshan Liu, Dantong Liu, Lei Bi, Xiaoye Zhang, Zongbo Shi

^*Corresponding author for this work

Research output: Contribution to journal › Letter › peer-review

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Abstract

Black carbon (BC) strongly absorbs solar radiation, contributing to global warming. Absorption enhancement of BC particles is difficult to quantify due to an inadequate representation of their complex morphology and mixing structures, as well as interaction with radiation. Here, we apply a 3D method accounting for detailed BC mixing structures to predict the absorption enhancement of individual BC particles (E_abs) and the total BC particle population (E_{abs, bulk}). The diverse range of mixing structures in individual BC particles leads to variable E_abs that could hardly be predicted by empirical approximations. We find that the volume proportion of the BC embedded in coating (F) determines E_abs when the particle to BC core diameter ratio (D_p/D_c) is larger than 2.0. Our findings reveal the potential mechanism behind the differences in observed and modeled E_{abs, bulk}. The framework builds a bridge connecting the microscopic mixing structure of individual BC particle with E_{abs, bulk}.

Original language	English
Article number	e2021GL096437
Number of pages	10
Journal	Geophysical Research Letters
Volume	48
Issue number	24
Early online date	13 Dec 2021
DOIs	https://doi.org/10.1029/2021GL096437
Publication status	Published - 28 Dec 2021

Bibliographical note

Funding Information:
We appreciate Peter Hyde’s comments and proofreading and Zeyun Shi’s advice on our python scripts. This work was supported by the National Natural Science Foundation of China (42075096 and 91844301), Zhejiang Provincial Natural Science Foundation of China (LZ19D050001), and Zhejiang Provincial Science and Technology Program in China (2021C01108).

Publisher Copyright:
© 2021. The Authors.

Keywords

black carbon
individual particle analysis
mixing state
mixing structure
optical absorption enhancement

ASJC Scopus subject areas

Geophysics
General Earth and Planetary Sciences

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WangY2021NonlinearFinal published version, 1.43 MBLicence: Creative Commons: Attribution (CC BY)

Cite this

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title = "Nonlinear enhancement of radiative absorption by black carbon in response to particle mixing structure",

abstract = "Black carbon (BC) strongly absorbs solar radiation, contributing to global warming. Absorption enhancement of BC particles is difficult to quantify due to an inadequate representation of their complex morphology and mixing structures, as well as interaction with radiation. Here, we apply a 3D method accounting for detailed BC mixing structures to predict the absorption enhancement of individual BC particles (Eabs) and the total BC particle population (Eabs, bulk). The diverse range of mixing structures in individual BC particles leads to variable Eabs that could hardly be predicted by empirical approximations. We find that the volume proportion of the BC embedded in coating (F) determines Eabs when the particle to BC core diameter ratio (Dp/Dc) is larger than 2.0. Our findings reveal the potential mechanism behind the differences in observed and modeled Eabs, bulk. The framework builds a bridge connecting the microscopic mixing structure of individual BC particle with Eabs, bulk.",

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T1 - Nonlinear enhancement of radiative absorption by black carbon in response to particle mixing structure

AU - Wang, Yuanyuan

AU - Li, Weijun

AU - Huang, Jin

AU - Liu, Lei

AU - Pang, Yuner

AU - He, Cenlin

AU - Liu, Fengshan

AU - Liu, Dantong

AU - Bi, Lei

AU - Zhang, Xiaoye

AU - Shi, Zongbo

N1 - Funding Information: We appreciate Peter Hyde’s comments and proofreading and Zeyun Shi’s advice on our python scripts. This work was supported by the National Natural Science Foundation of China (42075096 and 91844301), Zhejiang Provincial Natural Science Foundation of China (LZ19D050001), and Zhejiang Provincial Science and Technology Program in China (2021C01108). Publisher Copyright: © 2021. The Authors.

PY - 2021/12/28

Y1 - 2021/12/28

N2 - Black carbon (BC) strongly absorbs solar radiation, contributing to global warming. Absorption enhancement of BC particles is difficult to quantify due to an inadequate representation of their complex morphology and mixing structures, as well as interaction with radiation. Here, we apply a 3D method accounting for detailed BC mixing structures to predict the absorption enhancement of individual BC particles (Eabs) and the total BC particle population (Eabs, bulk). The diverse range of mixing structures in individual BC particles leads to variable Eabs that could hardly be predicted by empirical approximations. We find that the volume proportion of the BC embedded in coating (F) determines Eabs when the particle to BC core diameter ratio (Dp/Dc) is larger than 2.0. Our findings reveal the potential mechanism behind the differences in observed and modeled Eabs, bulk. The framework builds a bridge connecting the microscopic mixing structure of individual BC particle with Eabs, bulk.

AB - Black carbon (BC) strongly absorbs solar radiation, contributing to global warming. Absorption enhancement of BC particles is difficult to quantify due to an inadequate representation of their complex morphology and mixing structures, as well as interaction with radiation. Here, we apply a 3D method accounting for detailed BC mixing structures to predict the absorption enhancement of individual BC particles (Eabs) and the total BC particle population (Eabs, bulk). The diverse range of mixing structures in individual BC particles leads to variable Eabs that could hardly be predicted by empirical approximations. We find that the volume proportion of the BC embedded in coating (F) determines Eabs when the particle to BC core diameter ratio (Dp/Dc) is larger than 2.0. Our findings reveal the potential mechanism behind the differences in observed and modeled Eabs, bulk. The framework builds a bridge connecting the microscopic mixing structure of individual BC particle with Eabs, bulk.

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KW - individual particle analysis

KW - mixing state

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KW - optical absorption enhancement

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VL - 48

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Nonlinear enhancement of radiative absorption by black carbon in response to particle mixing structure

Abstract

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Keywords

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