globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD026328
论文题名:
Reference data set of volcanic ash physicochemical and optical properties
作者: Vogel A.; Diplas S.; Durant A.J.; Azar A.S.; Sunding M.F.; Rose W.I.; Sytchkova A.; Bonadonna C.; Krüger K.; Stohl A.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
语种: 英语
英文关键词: Chemical composition ; Complex refractive index ; Complex shape ; Dense-rock equivalent mass density ; Volcanic ash properties
英文摘要: Uncertainty in the physicochemical and optical properties of volcanic ash particles creates errors in the detection and modeling of volcanic ash clouds and in quantification of their potential impacts. In this study, we provide a data set that describes the physicochemical and optical properties of a representative selection of volcanic ash samples from nine different volcanic eruptions covering a wide range of silica contents (50-80 wt % SiO2). We measured and calculated parameters describing the physical (size distribution, complex shape, and dense-rock equivalent mass density), chemical (bulk and surface composition), and optical (complex refractive index from ultraviolet to near-infrared wavelengths) properties of the volcanic ash and classified the samples according to their SiO2 and total alkali contents into the common igneous rock types basalt to rhyolite. We found that the mass density ranges between ρ = 2.49 and 2.98 g/cm3 for rhyolitic to basaltic ash types and that the particle shape varies with changing particle size (d < 100 μm). The complex refractive indices in the wavelength range between λ = 300 nm and 1500 nm depend systematically on the composition of the samples. The real part values vary from n = 1.38 to 1.66 depending on ash type and wavelength and the imaginary part values from k = 0.00027 to 0.00268. We place our results into the context of existing data and thus provide a comprehensive data set that can be used for future and historic eruptions, when only basic information about the magma type producing the ash is known. ©2017. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62773
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Atmosphere and Climate Department Norwegian Institute for Air Research Kjeller Norway; Department of Geoscience, Meteorology and Oceanography Section University of Oslo Oslo Norway; SINTEF Materials and Chemistry Oslo Norway; Centre for Material Science and Nanotechnology, Department of Chemistry University of Oslo Oslo Norway; Geological and Mining Engineering and Sciences Michigan Technological University Houghton, Michigan USA; Energy Technologies Department, Optical Components Group ENEA Casaccia C.R.E Rome Italy; Department of Earth Sciences University of Geneva Geneva Switzerland

Recommended Citation:
Vogel A.,Diplas S.,Durant A.J.,et al. Reference data set of volcanic ash physicochemical and optical properties[J]. Journal of Geophysical Research: Atmospheres,2017-01-01
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