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  Impacts of Ionospheric Ions on Magnetic Reconnection and Earth's Magnetosphere Dynamics

Toledo-Redondo, S., André, M., Aunai, N., Chappell, C. R., Dargent, J., Fuselier, S. A., et al. (2021). Impacts of Ionospheric Ions on Magnetic Reconnection and Earth's Magnetosphere Dynamics. Reviews of Geophysics, 59(3): e2020RG000707. doi:10.1029/2020RG000707.

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Toledo-Redondo, S., Author
André, M., Author
Aunai, N., Author
Chappell, C. R., Author
Dargent, J., Author
Fuselier, S. A., Author
Glocer, A., Author
Graham, D. B., Author
Haaland, Stein1, Author           
Hesse, M., Author
Kistler, L. M., Author
Lavraud, B., Author
Li, W., Author
Moore, T. E., Author
Tenfjord, P., Author
Vines, S. K., Author
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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 Abstract: Ionospheric ions (mainly H+, He+, and O+) escape from the ionosphere and populate the Earth's magnetosphere. Their thermal energies are usually low when they first escape the ionosphere, typically a few electron volt to tens of electron volt, but they are energized in their journey through the magnetosphere. The ionospheric population is variable, and it makes significant contributions to the magnetospheric mass density in key regions where magnetic reconnection is at work. Solar wind—magnetosphere coupling occurs primarily via magnetic reconnection, a key plasma process that enables transfer of mass and energy into the near-Earth space environment. Reconnection leads to the triggering of magnetospheric storms, auroras, energetic particle precipitation and a host of other magnetospheric phenomena. Several works in the last decades have attempted to statistically quantify the amount of ionospheric plasma supplied to the magnetosphere, including the two key regions where magnetic reconnection occurs: the dayside magnetopause and the magnetotail. Recent in situ observations by the Magnetospheric Multiscale spacecraft and associated modeling have advanced our current understanding of how ionospheric ions alter the magnetic reconnection process, including its onset and efficiency. This article compiles the current understanding of the ionospheric plasma supply to the magnetosphere. It reviews both the quantification of these sources and their effects on the process of magnetic reconnection. It also provides a global description of how the ionospheric ion contribution modifies the way the solar wind couples to the Earth's magnetosphere and how these ions modify the global dynamics of the near-Earth space environment.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2020RG000707
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Title: Reviews of Geophysics
Source Genre: Journal
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Publ. Info: Washington : American Geophysical Union
Pages: - Volume / Issue: 59 (3) Sequence Number: e2020RG000707 Start / End Page: - Identifier: Other: 1944-9208
CoNE: https://pure.mpg.de/cone/journals/resource/1944-9208