Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-11863-2018 |
Wildfires as a source of airborne mineral dust - revisiting a conceptual model using large-eddy simulation (LES) | |
Wagner, Robert1; Jaehn, Michael1,2; Schepanski, Kerstin1 | |
2018-08-20 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:16页码:11863-11884 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Switzerland |
英文摘要 | Airborne mineral dust is a key player in the Earth system and shows manifold impacts on atmospheric properties such as the radiation budget and cloud microphysics. Investigations of smoke plumes originating from wildfires found significant fractions of mineral dust within these plumes - most likely raised by strong, turbulent fire-related winds. This study presents and revisits a conceptual model describing the emission of mineral dust particles during wildfires. This is achieved by means of high-resolution large-eddy simulation (LES), conducted with the All Scale Atmospheric Model (ASAM). The impact of (a) different fire properties representing idealized grassland and shrub-land fires, (b) different ambient wind conditions modulated by the fire's energy flux, and (c) the wind's capability to mobilize mineral dust particles was investigated. Results from this study illustrate that the energy release of the fire leads to a significant increase in near-surface wind speed, which consequently enhances the dust uplift potential. This is in particular the case within the fire area where vegetation can be assumed to be widely removed and uncovered soil is prone to wind erosion. The dust uplift potential is very sensitive to fire properties, such as fire size, shape, and intensity, but also depends on the ambient wind velocity. Although measurements already showed the importance of wildfires for dust emissions, pyro-convection is so far neglected as a dust emission process in atmosphere-aerosol models. The results presented in this study can be seen as the first step towards a systematic parameterization representing the connection between typical fire properties and related dust emissions. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442099800006 |
WOS关键词 | BIOMASS BURNING AEROSOLS ; WIND EROSION ; IRON SOLUBILITY ; FIRE EMISSIONS ; GRASS FIRES ; SOIL ; DYNAMICS ; SCALE ; ATMOSPHERE ; AUSTRALIA |
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/21695 |
专题 | 地球科学 |
作者单位 | 1.Leibniz Inst Tropospher Res TROPOS, Leipzig, Germany; 2.Swiss Fed Labs Mat Sci & Technol Empa, Dubendorf, Switzerland |
推荐引用方式 GB/T 7714 | Wagner, Robert,Jaehn, Michael,Schepanski, Kerstin. Wildfires as a source of airborne mineral dust - revisiting a conceptual model using large-eddy simulation (LES)[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(16):11863-11884. |
APA | Wagner, Robert,Jaehn, Michael,&Schepanski, Kerstin.(2018).Wildfires as a source of airborne mineral dust - revisiting a conceptual model using large-eddy simulation (LES).ATMOSPHERIC CHEMISTRY AND PHYSICS,18(16),11863-11884. |
MLA | Wagner, Robert,et al."Wildfires as a source of airborne mineral dust - revisiting a conceptual model using large-eddy simulation (LES)".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.16(2018):11863-11884. |
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