Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-9399-2017 |
Plume-exit modeling to determine cloud condensation nuclei activity of aerosols from residential biofuel combustion | |
Mena, Francisco1; Bond, Tami C.1; Riemer, Nicole2 | |
2017-08-07 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:15 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Residential biofuel combustion is an important source of aerosols and gases in the atmosphere. The change in cloud characteristics due to biofuel burning aerosols is uncertain, in part, due to the uncertainty in the added number of cloud condensation nuclei (CCN) from biofuel burning. We provide estimates of the CCN activity of biofuel burning aerosols by explicitly modeling plume dynamics (coagulation, condensation, chemical reactions, and dilution) in a young biofuel burning plume from emission until plume exit, defined here as the condition when the plume reaches ambient temperature and specific humidity through entrainment. We found that aerosol-scale dynamics affect CCN activity only during the first few seconds of evolution, after which the CCN efficiency reaches a constant value. Homogenizing factors in a plume are co-emission of semi-volatile organic compounds (SVOCs) or emission at small particle sizes; SVOC co-emission can be the main factor determining plume-exit CCN for hydrophobic or small particles. Coagulation limits emission of CCN to about 1016 per kilogram of fuel. Depending on emission factor, particle size, and composition, some of these particles may not activate at low supersaturation (s(sat) ). Hygroscopic Aitken-mode particles can contribute to CCN through self-coagulation but have a small effect on the CCN activity of accumulation-mode particles, regardless of composition differences. Simple models (monodisperse coagulation and average hygroscopicity) can be used to estimate plume-exit CCN within about 20% if particles are unimodal and have homogeneous composition, or when particles are emitted in the Aitken mode even if they are not homogeneous. On the other hand, if externally mixed particles are emitted in the accumulation mode without SVOCs, an average hygroscopicity overestimates emitted CCN by up to a factor of 2. This work has identified conditions under which particle populations become more homogeneous during plume processes. This homogenizing effect requires the components to be truly co-emitted, rather than sequentially emitted. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407329400003 |
WOS关键词 | BIOMASS BURNING AEROSOLS ; OPTICAL-PROPERTIES ; PARTICLE EMISSIONS ; ORGANIC AEROSOL ; WOOD COMBUSTION ; SMOKE PARTICLES ; FINE-PARTICLE ; GAS EMISSIONS ; TRACE GAS ; EVOLUTION |
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/30498 |
专题 | 地球科学 |
作者单位 | 1.Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA; 2.Univ Illinois, Dept Atmospher Sci, Urbana, IL 61801 USA |
推荐引用方式 GB/T 7714 | Mena, Francisco,Bond, Tami C.,Riemer, Nicole. Plume-exit modeling to determine cloud condensation nuclei activity of aerosols from residential biofuel combustion[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(15). |
APA | Mena, Francisco,Bond, Tami C.,&Riemer, Nicole.(2017).Plume-exit modeling to determine cloud condensation nuclei activity of aerosols from residential biofuel combustion.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(15). |
MLA | Mena, Francisco,et al."Plume-exit modeling to determine cloud condensation nuclei activity of aerosols from residential biofuel combustion".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.15(2017). |
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