Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-1879-2018 |
Investigating biomass burning aerosol morphology using a laser imaging nephelometer | |
Manfred, Katherine M.1,2; Washenfelder, Rebecca A.2; Wagner, Nicholas L.1,2; Adler, Gabriela1,2; Erdesz, Frank1,2; Womack, Caroline C.1,2; Lamb, Kara D.1,2; Schwarz, Joshua P.2; Franchin, Alessandro1,2; Selimovic, Vanessa3; Yokelson, Robert J.3; Murphy, Daniel M.2 | |
2018-02-08 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:3页码:1879-1894 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Particle morphology is an important parameter affecting aerosol optical properties that are relevant to climate and air quality, yet it is poorly constrained due to sparse in situ measurements. Biomass burning is a large source of aerosol that generates particles with different morphologies. Quantifying the optical contributions of non-spherical aerosol populations is critical for accurate radiative transfer models, and for correctly interpreting remote sensing data. We deployed a laser imaging nephelometer at the Missoula Fire Sciences Laboratory to sample biomass burning aerosol from controlled fires during the FIREX intensive laboratory study. The laser imaging nephelometer measures the unpolarized scattering phase function of an aerosol ensemble using diode lasers at 375 and 405 nm. Scattered light from the bulk aerosol in the instrument is imaged onto a charge- coupled device (CCD) using a wide-angle field-of-view lens, which allows for measurements at 4-175 degrees scattering angle with similar to 0.5 degrees angular resolution. Along with a suite of other instruments, the laser imaging nephelometer sampled fresh smoke emissions both directly and after removal of volatile components with a thermodenuder at 250 degrees C. The total integrated aerosol scattering signal agreed with both a cavity ring-down photoacoustic spectrometer system and a traditional integrating nephelometer within instrumental uncertainties. We compare the measured scattering phase functions at 405 nm to theoretical models for spherical (Mie) and fractal (Rayleigh-Debye-Gans) particle morphologies based on the size distribution reported by an optical particle counter. Results from representative fires demonstrate that particle morphology can vary dramatically for different fuel types. In some cases, the measured phase function cannot be described using Mie theory. This study demonstrates the capabilities of the laser imaging nephelometer instrument to provide realtime, in situ information about dominant particle morphology, which is vital for understanding remote sensing data and accurately describing the aerosol population in radiative transfer calculations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000424633900003 |
WOS关键词 | LIGHT-SCATTERING PROPERTIES ; OPTICAL-PROPERTIES ; SIZE DISTRIBUTION ; REFRACTIVE-INDEX ; SOOT AEROSOLS ; BLACK CARBON ; COMPREHENSIVE CHARACTERIZATION ; LABORATORY MEASUREMENTS ; AIRBORNE MEASUREMENTS ; AIRCRAFT INSTRUMENT |
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/23844 |
专题 | 地球科学 |
作者单位 | 1.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 2.NOAA, Chem Sci Div, Earth Syst Res Lab, Boulder, CO 80305 USA; 3.Univ Montana, Dept Chem, Missoula, MT 59812 USA |
推荐引用方式 GB/T 7714 | Manfred, Katherine M.,Washenfelder, Rebecca A.,Wagner, Nicholas L.,et al. Investigating biomass burning aerosol morphology using a laser imaging nephelometer[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(3):1879-1894. |
APA | Manfred, Katherine M..,Washenfelder, Rebecca A..,Wagner, Nicholas L..,Adler, Gabriela.,Erdesz, Frank.,...&Murphy, Daniel M..(2018).Investigating biomass burning aerosol morphology using a laser imaging nephelometer.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(3),1879-1894. |
MLA | Manfred, Katherine M.,et al."Investigating biomass burning aerosol morphology using a laser imaging nephelometer".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.3(2018):1879-1894. |
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