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Yu, B, Xue, X, Scott, CJ et al. (8 more authors) (2020) Interhemispheric transport of metallic ions within ionospheric sporadic E layers by the lower thermospheric meridional circulation. Atmospheric Chemistry and Physics Discussions. ISSN 1680-7367
Abstract
Long-lived metallic ions in the Earth’s atmosphere/ionosphere have been investigated for many decades. Although the seasonal variation in ionospheric ‘sporadic E’ layers was first observed in the 1960s, the mechanism driving the variation remains a long-standing mystery. Here we report a study of ionospheric irregularities using scintillation data from COSMIC satellites and identify a large-scale horizontal transport of long-lived metallic ions, combined with the simulations of the Whole 5 Atmosphere Community Climate Model with the chemistry of metals and ground-based observations from two meridional chains of stations from 1975–2016. We find that the lower thermospheric meridional circulation influences the meridional transport and seasonal variations of metallic ions within sporadic E layers. The winter-to-summer, meridional velocity of ions is estimated to vary between -1.08 and 7.45 m/s at altitudes of 107–118 km between 10◦–60◦N latitude. Our results not only provide strong support for the lower thermospheric meridional circulation predicted by a whole atmosphere chemistry-climate 10 model, but also emphasise the influences of this winter-to-summer circulation on the large-scale interhemispheric transport of composition in the thermosphere/ionosphere.
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Copyright, Publisher and Additional Information: | © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. | ||||
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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 Environment (Leeds) > School of Earth and Environment (Leeds) > National Centre for Atmos Science (NCAS) (Leeds) |
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Depositing User: | Symplectic Publications | ||||
Date Deposited: | 05 Jan 2021 14:30 | ||||
Last Modified: | 05 Jan 2021 14:30 | ||||
Status: | Published | ||||
Publisher: | Copernicus Publications | ||||
Identification Number: | https://doi.org/10.5194/acp-2020-820 |
Available Versions of this Item
- Interhemispheric transport of metallic ions within ionospheric sporadic E layers by the lower thermospheric meridional circulation. (deposited 05 Jan 2021 14:30) [Currently Displayed]