Frankland, VL, James, AD, Feng, W et al. (1 more author) (2015) The uptake of HNO3 on meteoric smoke analogues. Journal of Atmospheric and Solar-Terrestrial Physics, 127. pp. 150-160. ISSN 1364-6826
Abstract
The uptake of HNO3, H2O, NO2 and NO was studied on meteoric smoke particle analogues using a low-pressure Knudsen cell operating at 295K. The analogues used were olivine (MgFeSiO4) and a haematite/goethite (Fe2O3/FeO(OH)) mixture synthesised by the sol-gel process. For uptake on MgFeSiO4, the following uptake coefficients were obtained: γ(HNO3)=(1.8±0.3)×10-3, γ(H2O)=(4.0±1.3)×10-3, γ(NO2)=(5.7±0.2)×10-4 and γ(NO)<3×10-4. γ(HNO3) did not show a dependence on the mass of MgFeSiO4 in the Knudsen cell (when varied by a factor of 6) implying that, because of relatively efficient uptake, HNO3 is removed only by near-surface particles. This was corroborated by application of a surface uptake model. Saturating the MgFeSiO4 particles with water vapour before exposing them to NO2 increased γ(NO2) to (2.1±0.7)×10-3, but had a very small effect on γ(HNO3). For uptake on Fe2O3/FeO(OH), γ(HNO3)=(1.5±0.2)×10-3. These results were then included in a whole atmosphere chemistry-climate model, which shows that the heterogeneous removal on meteoric smoke particles in the winter polar vortex between 30 and 60km appears to provide an important sink for HNO3.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 Elsevier Ltd. This is an author produced version of a paper published in Journal of Atmospheric and Solar-Terrestrial Physics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Meteoric smoke; Nitric acid; Polar vortex; Uptake coefficient; Knudsen cell |
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) |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 May 2016 12:56 |
Last Modified: | 07 May 2016 02:04 |
Published Version: | https://dx.doi.org/10.1016/j.jastp.2015.01.010 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jastp.2015.01.010 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:92269 |