GSTDTAP  > 地球科学
DOI10.5194/acp-19-11669-2019
Light absorption properties and potential sources of particulate brown carbon in the Pearl River Delta region of China
Li, Zhujie1,2,7; Tan, Haobo2,3; Zheng, Jun1; Liu, Li2,4; Qin, Yiming5,8; Wang, Nan2; Li, Fei2; Li, Yongjie6; Cai, Mingfu4; Ma, Yan1; Chan, Chak K.5
2019-09-19
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2019
卷号19期号:18页码:11669-11685
文章类型Article
语种英语
国家Peoples R China; USA
英文摘要

Brown carbon (BrC) is a special type of organic aerosol (OA), capable of absorbing solar radiation from near-ultraviolet (UV) to visible wavelengths, which may lead to an increased aerosol radiative effect in the atmosphere. While high concentrations of OAs have been observed in the Pearl River Delta (PRD) region of China, the optical properties and corresponding radiative forcing of BrC in the PRD are still not well understood. In this work, we conducted a set of comprehensive measurements of atmospheric particulate matter from 29 November 2014 to 2 January 2015 to investigate aerosol compositions, optical properties, source origins, and radiative forcing effects at a suburban station in Guangzhou. The particle absorption angstrom ngstrom exponent (AAE) was deduced and utilized to distinguish light absorption by BrC from that by black carbon (BC). The results showed that the average absorption contributions of BrC were 34.1 +/- 8.0 % at 370 nm, 23.7 +/- 7.3 % at 470 nm, 16.0 +/- 6.7 % at 520 nm, 13.0 +/- 5.4 % at 590 nm, and 8.7 +/- 4.3 % at 660 nm. A sensitivity analysis of the evaluation of the absorption angstrom ngstrom exponent of BC (AAE(BC)) was conducted based on the Mie theory calculation assuming that the BC-containing aerosol was mixed with the core-shell and external configurations. The corresponding uncertainty in AAE(BC) was acquired. We found that variations in the imaginary refractive index (RI) of the BC core can significantly affect the estimation of AAE(BC). However, AAE(BC) was relatively less sensitive to the real part of the RI of the BC core and was least sensitive to the real part of the RI of the non-light-absorbing shell. BrC absorption was closely related to aerosol potassium cation content (K+), a common tracer of biomass burning emissions, which was most likely associated with straw burning in the rural area of the western PRD. Diurnal variation in BrC absorption revealed that primary organic aerosols had a larger BrC absorption capacity than secondary organic aerosols (SOAs). Radiative transfer simulations showed that BrC absorption may cause 2.3 +/- 1.8 W m(-2) radiative forcing at the top of the atmosphere (TOA) and contribute to 15.8 +/- 4.4 % of the aerosol warming effect. A chart was constructed to conveniently assess the BrC radiative forcing efficiency in the studied area with reference to certain aerosol single-scattering albedo (SSA) and BrC absorption contributions at various wavelengths. Evidently, the BrC radiative forcing efficiency was higher at shorter wavelengths.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000486705200001
WOS关键词AEROSOL OPTICAL-PROPERTIES ; BLACK CARBON ; MIXING STATE ; RADIATIVE PROPERTIES ; ANGSTROM EXPONENT ; ELEMENTAL CARBON ; ORGANIC-CARBON ; BIOMASS ; AETHALOMETER ; SCATTERING
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/187119
专题地球科学
作者单位1.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Atmospher Environm & Equip, Nanjing, Jiangsu, Peoples R China;
2.China Meteorol Adm, Inst Trop & Marine Meteorol, Key Lab Reg Numer Weather Predict, Guangzhou, Guangdong, Peoples R China;
3.Foshan Meteorol Serv Guangdong, Foshan 528010, Guangdong, Peoples R China;
4.Sun Yat Sen Univ, Dept Atmospher Sci, Guangzhou, Guangdong, Peoples R China;
5.City Univ Hong Kong, Sch Energy & Environm, Hong Kong, Peoples R China;
6.Univ Macau, Fac Sci & Technol, Dept Civil & Environm Engn, Taipa, Macao, Peoples R China;
7.Emergency Early Warning Release & Weather Modific, Guangzhou 510080, Guangdong, Peoples R China;
8.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA
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GB/T 7714
Li, Zhujie,Tan, Haobo,Zheng, Jun,et al. Light absorption properties and potential sources of particulate brown carbon in the Pearl River Delta region of China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(18):11669-11685.
APA Li, Zhujie.,Tan, Haobo.,Zheng, Jun.,Liu, Li.,Qin, Yiming.,...&Chan, Chak K..(2019).Light absorption properties and potential sources of particulate brown carbon in the Pearl River Delta region of China.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(18),11669-11685.
MLA Li, Zhujie,et al."Light absorption properties and potential sources of particulate brown carbon in the Pearl River Delta region of China".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.18(2019):11669-11685.
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