Jiang, Hongxing1,2,5; Li, Jun1,2; Chen, Duohong3; Tang, Jiao1,2,5; Cheng, Zhineng1,2; Mo, Yangzhi1,2; Su, Tao1,2,5; Tian, Chongguo4
; Jiang, Bing1,2; Liao, Yuhong1,2; Zhang, Gan1,2发表期刊ENVIRONMENT INTERNATIONAL
ISSN0160-4120
2020-11-01
卷号144页码:9
关键词Brown carbonPolar carbon fractionsBiomass burning organic aerosolPearl River Delta RegionMolecular composition
DOI10.1016/j.envint.2020.106079
通讯作者Li, Jun(junli@gig.ac.cn); Chen, Duohong(chenduohong@139.com)
英文摘要Atmospheric brown carbon (BrC) is an important constituent of light-absorbing organic aerosols with many unclear issues. Here, the light-absorption properties of BrC with different polarity characteristics at a regional site of Pearl River Delta Region during 2016-2017, influenced by sources and molecular compositions, were revealed using radiocarbon analysis and Fourier transform ion cyclotron resonance mass spectrometry. Humic-like substance (HULIS), middle polar (MP), and low polar (LP) carbon fractions constitute 46 +/- 17%, 30 +/- 7%, and 7 +/- 3% of total absorption coefficient from bulk extracts, respectively. Our results show that the absorption proportions of HULIS and MP to the total BrC absorption are higher than their mass proportions to organic carbon mass, indicating that HULIS and MP are the main light-absorbing components in water-soluble and water-insoluble organic carbon fractions, respectively. With decreases in non-fossil HULIS, MP, and LP carbon fractions (66 +/- 2%, 52 +/- 2%, and 36 +/- 3%, respectively), the abundances of unsaturated compounds and mass absorption efficiency at 365 nm of three fractions decreased synchronously. Increases in both nonfossil carbon and levoglucosan in winter imply that the enhanced light-absorption could be attributed to elevated levels of biomass burning organic aerosols (BBOA), which increases the number of light-absorbing nitrogencontaining compounds. Moreover, the major type of potential BrC in HULIS and MP carbon fractions are oxidized BBOA, but the potential BrC chromophores in LP are mainly associated with primary BBOA. This study reveals that biomass burning has adverse effects on radiative forcing and air quality, and probably indicates the significant influences of atmospheric oxidation reactions on the forms of chromophores.
资助机构National Key R&D Program of China; National Natural Science Foundation of China (NSFC); State Key Laboratory of Organic Geochemistry, GIGCAS; Guangdong Foundation for Program of Science and Technology Research
收录类别SCI
语种英语
关键词[WOS]HUMIC-LIKE SUBSTANCES; PARTICULATE BROWN CARBON; OPTICAL-PROPERTIES; MOLECULAR CHARACTERIZATION; BLACK CARBON; CHEMICAL CHARACTERISTICS; SOURCE APPORTIONMENT; ABSORBING PROPERTIES; APEC SUMMIT; MASS
研究领域[WOS]Environmental Sciences & Ecology
WOS记录号WOS:000580630100078
引用统计被引频次：7[WOS][WOS记录][WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/28327
专题中科院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
中科院海岸带环境过程与生态修复重点实验室
通讯作者Li, Jun; Chen, Duohong作者单位1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resourc, Guangzhou 510640, Peoples R China
3.Guangdong Environm Monitoring Ctr, Guangzhou 510308, Peoples R China
4.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714Jiang, Hongxing,Li, Jun,Chen, Duohong,et al. Biomass burning organic aerosols significantly influence the light absorption properties of polarity-dependent organic compounds in the Pearl River Delta Region, China[J]. ENVIRONMENT INTERNATIONAL,2020,144:9.
APAJiang, Hongxing.,Li, Jun.,Chen, Duohong.,Tang, Jiao.,Cheng, Zhineng.,...&Zhang, Gan.(2020).Biomass burning organic aerosols significantly influence the light absorption properties of polarity-dependent organic compounds in the Pearl River Delta Region, China.ENVIRONMENT INTERNATIONAL,144,9.
MLAJiang, Hongxing,et al."Biomass burning organic aerosols significantly influence the light absorption properties of polarity-dependent organic compounds in the Pearl River Delta Region, China".ENVIRONMENT INTERNATIONAL 144(2020):9.
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