气候变化领域集成服务门户(CCPortal): Impacts of biomass burning and photochemical processing on the lightabsorption of brown carbon in the southeastern Tibetan Plateau

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DOI	10.5194/acp-23-1879-2023
	Impacts of biomass burning and photochemical processing on the lightabsorption of brown carbon in the southeastern Tibetan Plateau
	Tian, Jie; Wang, Qiyuan; Ma, Yongyong; Wang, Jin; Han, Yongming; Cao, Junji
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	1879
结束页码	1892
卷号	23 期号:3 页码:14
英文摘要	Brown carbon (BrC) in the atmosphere can greatly influence aerosol's radiative forcing over the Tibetan Plateau (TP) because it has the non-negligible capacity of light absorption compared to black carbon (BC); however, our understanding of optical properties, sources, and atmospheric processes of BrC in this region remains limited. In this study, a multiple-wavelength Aethalometer coupled with a quadrupole aerosol chemical speciation monitor was deployed to investigate the highly time resolved BrC in the submicron aerosol at the southeastern edge of the TP during the pre-monsoon season. The results showed that BrC made substantial contributions (20.0 %-40.2 %) to the light absorption of submicron aerosol from 370 to 660 nm. Organic aerosol (OA), an alternative to BrC, was split into a biomass burning OA (BBOA) with aging processes and a photochemical-oxidation-processed oxygenated OA (po-OOA) by a hybrid environmental receptor model analysis. Combined with the light absorption coefficient of BrC (b(abs-BrC)), the source-specific mass absorption cross sections of BBOA (0.61-2.78 m(2) g(-1)) and po-OOA (0.30-1.43 m(2) g(-1)) at 370-660 nm were retrieved. On average, b(abs-BrC) from po-OOA (1.3-6.0 Mm(-1)) was comparable to that from BBOA (1.3-6.0 Mm(-1)) at all wavelengths. The concentration-weighted trajectory analysis showed that the most important potential source regions for b(abs-BrC) values from BBOA and po-OOA were located in northern Myanmar and along the China-Myanmar border, indicating the cross-border transport of BrC from Southeast Asia. A simple forcing efficiency evaluation further illustrated the importance of the BrC radiative effect with the high fractional radiative forcing by two OAs relative to BC (48.8 +/- 15.5 %). This study highlights a significant influence of BrC of biomass burning origin and secondary formation on climate change over the TP region during the pre-monsoon season.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000925739900001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273665
作者单位	Chinese Academy of Sciences; Institute of Earth Environment, CAS; Chinese Academy of Sciences; Institute of Atmospheric Physics, CAS
推荐引用方式 GB/T 7714	Tian, Jie,Wang, Qiyuan,Ma, Yongyong,et al. Impacts of biomass burning and photochemical processing on the lightabsorption of brown carbon in the southeastern Tibetan Plateau[J],2023,23(3):14.
APA	Tian, Jie,Wang, Qiyuan,Ma, Yongyong,Wang, Jin,Han, Yongming,&Cao, Junji.(2023).Impacts of biomass burning and photochemical processing on the lightabsorption of brown carbon in the southeastern Tibetan Plateau.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(3),14.
MLA	Tian, Jie,et al."Impacts of biomass burning and photochemical processing on the lightabsorption of brown carbon in the southeastern Tibetan Plateau".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.3(2023):14.