Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD031224 |
Mie Scattering Captures Observed Optical Properties of Ambient Biomass Burning Plumes Assuming Uniform Black, Brown, and Organic Carbon Mixtures | |
Chylek, Petr1; Lee, James E.1; Romonosky, Dian E.1,2; Gallo, Francesca1; Lou, Sijia3; Shrivastava, Manish3; Carrico, Christian M.1,4; Aiken, Allison C.1; Dubey, Manvendra K.1 | |
2019-11-06 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
![]() |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:21页码:11406-11427 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We use a simple model of a spherical biomass burning aerosol particle containing an internal mixture of black carbon (BC) and organic carbon (OC) with an effective refractive index calculated as a volume fraction-weighted mean of refractive indices. Brown carbon (BrC) is considered to be an OC with an imaginary part of refractive index at the blue end of the solar spectrum higher (in absolute value) than at the red end. Mie-scattering formalism is employed to calculate absorption angstrom ngstrom exponent (AAE) as a function of single-scattering albedo (SSA) for a set of BC refractive indices, BC volume fraction, and a set of effective refractive indices of BC and BrC mixtures. Ambient plumes are characterized by their mean SSA at 405 nm wavelength and two-wavelength (405 and 781 nm) AAE values. Comparing observed and model-calculated AAE and SSA values identifies the BC refractive index and its volume fraction and an effective refractive index of the BC and BrC mixture. From these values, the imaginary part of BrC refractive index is calculated. For observed southwestern ambient fires, the imaginary part of BrC refractive index is <= 0.016. In contrast, fires in the Amazon and from Africa are dominated by BC. We also use the Mie scattering model to establish the upper limit on AAE of BC (AAE <= 1.4) and the upper limit of the BC and OC mixture (AAE <= 1.7). Any AAE(405/781) > 1.7 requires the presence of BrC. We derive several relationships between AAE, SSA, BC fractions, and an imaginary part of BrC refractive index of ambient fires. |
英文关键词 | ambient fires angstrom ngstrom exponent biomass burning black carbon brown carbon organic carbon |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000494614300001 |
WOS关键词 | ABSORPTION ANGSTROM EXPONENT ; AEROSOL LIGHT-ABSORPTION ; SEA-SALT AEROSOL ; SPHERICAL-PARTICLES ; MIXING STATE ; ALBEDO ; DEPENDENCE ; SOOT ; APPROXIMATION ; SMOKE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/225756 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Los Alamos Natl Lab, Earth & Environm Sci, Los Alamos, NM 87545 USA; 2.SUNY Coll Geneseo, Dept Chem, Geneseo, NY 14454 USA; 3.Pacific Northwest Natl Lab, Richland, WA 99352 USA; 4.New Mexico Inst Min & Technol, Dept Civil & Environm Engn, Socorro, NM 87801 USA |
推荐引用方式 GB/T 7714 | Chylek, Petr,Lee, James E.,Romonosky, Dian E.,et al. Mie Scattering Captures Observed Optical Properties of Ambient Biomass Burning Plumes Assuming Uniform Black, Brown, and Organic Carbon Mixtures[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(21):11406-11427. |
APA | Chylek, Petr.,Lee, James E..,Romonosky, Dian E..,Gallo, Francesca.,Lou, Sijia.,...&Dubey, Manvendra K..(2019).Mie Scattering Captures Observed Optical Properties of Ambient Biomass Burning Plumes Assuming Uniform Black, Brown, and Organic Carbon Mixtures.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(21),11406-11427. |
MLA | Chylek, Petr,et al."Mie Scattering Captures Observed Optical Properties of Ambient Biomass Burning Plumes Assuming Uniform Black, Brown, and Organic Carbon Mixtures".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.21(2019):11406-11427. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论