Havnes, O, Latteck, R, Hartquist, TW et al. (1 more author) (2018) First simultaneous rocket and radar detections of rare low summer mesospheric clouds. Geophysical Research Letters, 45 (11). pp. 5727-5734. ISSN 0094-8276
Abstract
On 30 June 2016 a layer of dust, possibly meteoric smoke particles (MSPs), was observed with a rocket borne probe at 69.29°N, 16.02°E and altitudes of ~74 km where patchy thin cloud layers, detected with the Middle Atmosphere Alomar Radar System, were present. The rocket traversed a layer with a net positive dust charge density of ~10⁷ unit charges per cubic meters and a number density of neutral dust particles with sizes ≥4 nm of ~10⁸ m−³. The positive charge density may require that elements that lower the photoelectric work function coat MSPs. The presence of this relatively large dust is consistent with smaller MSPs being swept out of the low mesospheric cloud region during the summer, while larger MSPs remain where their fall velocities equals the circulation updraught velocities. Large MSPs initially embedded in icy particles that subsequently sublimate may also fall until their fall velocities match the updraught velocities.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | ©2018. American Geophysical Union. All Rights Reserved. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | mesospheric clouds; meteoric smoke; rocket and radar; in situ dust measurements; positive dust charges; dust size sorting |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 30 May 2018 15:45 |
Last Modified: | 10 Dec 2018 01:39 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1029/2018GL078218 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:131361 |