Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027362 |
The Complex Refractive Index of Volcanic Ash Aerosol Retrieved From Spectral Mass Extinction | |
Reed, Benjamin E.1; Peters, Daniel M.1,2; McPheat, Robert2; Grainger, R. G.3 | |
2018-01-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:2页码:1339-1350 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | The complex refractive indices of eight volcanic ash samples, chosen to have a representative range of SiO2 contents, were retrieved from simultaneous measurements of their spectral mass extinction coefficient and size distribution. The mass extinction coefficients, at 0.33-19m, were measured using two optical systems: a Fourier transform spectrometer in the infrared and two diffraction grating spectrometers covering visible and ultraviolet wavelengths. The particle size distribution was measured using a scanning mobility particle sizer and an optical particle counter; values for the effective radius of ash particles measured in this study varied from 0.574 to 1.16m. Verification retrievals on high-purity silica aerosol demonstrated that the Rayleigh continuous distribution of ellipsoids (CDEs) scattering model significantly outperformed Mie theory in retrieving the complex refractive index, when compared to literature values. Assuming the silica particles provided a good analogue of volcanic ash, the CDE scattering model was applied to retrieve the complex refractive index of the eight ash samples. The Lorentz formulation of the complex refractive index was used within the retrievals as a convenient way to ensure consistency with the Kramers-Kronig relation. The short-wavelength limit of the electric susceptibility was constrained by using independently measured reference values of the complex refractive index of the ash samples at a visible wavelength. The retrieved values of the complex refractive indices of the ash samples showed considerable variation, highlighting the importance of using accurate refractive index data in ash cloud radiative transfer models. |
英文关键词 | volcanic ash complex refractive index aerosol optical properties Rayleigh CDE model mass extinction spectra scattering theory |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425520200042 |
WOS关键词 | SIZE DISTRIBUTION MEASUREMENTS ; OPTICAL-PROPERTIES ; LIGHT-SCATTERING ; PARTICLES ; CLOUDS ; QUARTZ ; DUST ; RISK ; COMPONENTS ; SPHEROIDS |
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/32491 |
专题 | 气候变化 |
作者单位 | 1.Univ Oxford, Atmospher, Ocean & Planetary Phys, Oxford, England; 2.STFC Rutherford Appleton Lab, RAL Space, Harwell, Berks, England; 3.Univ Oxford, COMET, Atmospher, Ocean & Planetary Phys, Oxford, England |
推荐引用方式 GB/T 7714 | Reed, Benjamin E.,Peters, Daniel M.,McPheat, Robert,et al. The Complex Refractive Index of Volcanic Ash Aerosol Retrieved From Spectral Mass Extinction[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(2):1339-1350. |
APA | Reed, Benjamin E.,Peters, Daniel M.,McPheat, Robert,&Grainger, R. G..(2018).The Complex Refractive Index of Volcanic Ash Aerosol Retrieved From Spectral Mass Extinction.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(2),1339-1350. |
MLA | Reed, Benjamin E.,et al."The Complex Refractive Index of Volcanic Ash Aerosol Retrieved From Spectral Mass Extinction".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.2(2018):1339-1350. |
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