Brownness of Organic Aerosol over the United States: Evidence for Seasonal Biomass Burning and Photobleaching Effects
文献类型：期刊论文
| 作者 | Chen, Lung-Wen Antony1,5; Chow, Judith C.1,2; Wang, Xiaoliang1; Cao, Junji2,3; Mao, Jingqiu4; Watson, John G.1,2 |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2021-07-06 |
| 卷号 | 55期号:13页码:8561-8572 |
| ISSN号 | 0013-936X |
| 关键词 | brown carbon black carbon white carbon aerosol aging IMPROVE network hybrid environmental receptor model |
| DOI | 10.1021/acs.est.0c08706 |
| 通讯作者 | Chen, Lung-Wen Antony(antony.chen@unlv.edu) |
| 英文摘要 | Light-absorptivity of organic aerosol may play an important role in visibility and climate forcing, but it has not been assessed as extensively as black carbon (BC) aerosol. Based on multiwavelength thermal/optical analysis and spectral mass balance, this study quantifies BC for the U.S. Interagency Monitoring of Protected Visual Environments (IMPROVE) network while developing a brownness index (gamma(Br)) for non-BC organic carbon (OC*) to illustrate the spatiotemporal trends of light-absorbing brown carbon (BrC) content. OC* light absorption efficiencies range from 0 to 3.1 m(2) gC(-1) at 405 nm, corresponding to the lowest and highest BrC content of 0 and 100%, respectively. BC, OC*, and gamma(Br) explain >97% of the variability of measured spectral light absorption (405-980 nm) across 158 IMPROVE sites. Network-average OC* light absorptions at 405 nm are 50 and 28% those for BC over rural and urban areas, respectively. Larger organic fractions of light absorption occur in winter, partially due to higher organic brownness. Winter gamma(Br) exhibits a dramatic regional/urban-rural contrast consistent with anthropogenic BrC emissions from residential wood combustion. The spatial differences diminish to uniformly low gamma(Br) in summer, suggesting effective BrC photobleaching over the midlatitudes. An empirical relationship between BC, ambient temperature, and gamma(Br) is established, which can facilitate the incorporation of organic aerosol absorptivity into climate and visibility models that currently assume either zero or static organic light absorption efficiencies. |
| WOS关键词 | ELEMENTAL CARBON ; BLACK CARBON ; SOURCE APPORTIONMENT ; LIGHT-ABSORPTION ; IMPROVE ; PM2.5 ; MASS ; TEMPERATURE ; AETHALOMETER ; EVOLUTION |
| 资助项目 | U.S. National Park Service IMPROVE Carbon Analysis Contract[P16PC0022] ; National Science Foundation[AGS 2026821/2026824] ; University of Nevada, Las Vegas[2018001P] ; Institute of Earth Environment, Chinese Academy of Sciences[2018001P] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000671872100011 |
| 资助机构 | U.S. National Park Service IMPROVE Carbon Analysis Contract ; National Science Foundation ; University of Nevada, Las Vegas ; Institute of Earth Environment, Chinese Academy of Sciences |
| 源URL | [http://ir.ieecas.cn/handle/361006/16828]  |
| 专题 | 中国科学院地球环境研究所 |
| 通讯作者 | Chen, Lung-Wen Antony |
| 作者单位 | 1.Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA 2.Chinese Acad Sci, Inst Earth Environm, Xian 710061, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China 4.Univ Alaska, Dept Chem & Biochem, Fairbanks, AK 99775 USA 5.Univ Nevada, Dept Environm & Occupat Hlth, Sch Publ Hlth, Las Vegas, NV 89154 USA |
| 推荐引用方式 GB/T 7714 | Chen, Lung-Wen Antony,Chow, Judith C.,Wang, Xiaoliang,et al. Brownness of Organic Aerosol over the United States: Evidence for Seasonal Biomass Burning and Photobleaching Effects[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,55(13):8561-8572. |
| APA | Chen, Lung-Wen Antony,Chow, Judith C.,Wang, Xiaoliang,Cao, Junji,Mao, Jingqiu,&Watson, John G..(2021).Brownness of Organic Aerosol over the United States: Evidence for Seasonal Biomass Burning and Photobleaching Effects.ENVIRONMENTAL SCIENCE & TECHNOLOGY,55(13),8561-8572. |
| MLA | Chen, Lung-Wen Antony,et al."Brownness of Organic Aerosol over the United States: Evidence for Seasonal Biomass Burning and Photobleaching Effects".ENVIRONMENTAL SCIENCE & TECHNOLOGY 55.13(2021):8561-8572. |
入库方式： OAI收割
来源：地球环境研究所
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