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Aylett, T, Brooke, JSA, James, AD orcid.org/0000-0003-0532-0065 et al. (4 more authors) (2019) Optical properties of meteoric smoke analogues. Atmospheric Chemistry and Physics, 19 (19). pp. 12767-12777. ISSN 1680-7316
Abstract
Accurate determination of the optical properties of analogues for meteoric smoke particles (MSPs), which are thought to be composed of iron-rich oxides or silicates, is important for their observation and characterization in the atmosphere. In this study, a photochemical aerosol flow system (PAFS) has been used to measure the optical extinction of iron oxide MSP analogues in the wavelength range 325–675 nm. The particles were made photochemically and agglomerate into fractal-like particles with sizes on the order of 100 nm. Analysis using transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and electron energy loss spectroscopy (EELS) suggested the particles were most likely maghemite-like (γ-Fe2O3) in composition, though a magnetite-like composition could not be completely ruled out. Assuming a maghemite-like composition, the optical extinction coefficients measured using the PAFS were combined with maghemite absorption coefficients measured using a complementary experimental system (the MICE-TRAPS) to derive complex refractive indices that reproduce both the measured absorption and extinction.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Author(s) 2019. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Physical Chemistry (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 25 Oct 2019 12:53 |
Last Modified: | 30 Jun 2020 14:50 |
Status: | Published |
Publisher: | Copernicus Publications |
Identification Number: | 10.5194/acp-19-12767-2019 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:152608 |
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Optical properties of meteoric smoke analogues. (deposited 19 Dec 2019 11:02)
- Optical properties of meteoric smoke analogues. (deposited 25 Oct 2019 12:53) [Currently Displayed]