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  The Polar Wind Modulated by the Spatial Inhomogeneity of the Strength of the Earth's Magnetic Field

Li, K., Förster, M., Rong, Z., Haaland, S., Kronberg, E. A., Cui, J., et al. (2020). The Polar Wind Modulated by the Spatial Inhomogeneity of the Strength of the Earth's Magnetic Field. Journal of Geophysical Research: Space Physics, 125(4): e2020JA027802. doi:10.1029/2020JA027802.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-0A80-E Version Permalink: http://hdl.handle.net/21.11116/0000-0006-0A81-D
Genre: Journal Article

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 Creators:
Li, Kun, Author
Förster, Matthias1, Author
Rong, Zhaojin, Author
Haaland, Stein1, Author              
Kronberg, Elena A.1, Author              
Cui, Jun, Author
Chai, Lihui, Author
Wei, Yong, Author
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, Justus-von-Liebig-Weg 3, 37077 Göttingen, DE, ou_1832288              

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 Abstract: When the geomagnetic field is weak, the small mirror force allows precipitating charged particles to deposit energy in the ionosphere. This leads to an increase in ionospheric outflow from the Earth's polar cap region, but such an effect has not been previously observed because the energies of the ions of the polar ionospheric outflow are too low, making it difficult to detect the low‐energy ions with a positively charged spacecraft. In this study, we found an anticorrelation between ionospheric outflow and the strength of the Earth's magnetic field. Our results suggest that the electron precipitation through the polar rain can be a main energy source of the polar wind during periods of high levels of solar activity. The decreased magnetic field due to spatial inhomogeneity of the Earth's magnetic field and its effect on outflow can be used to study the outflow in history when the magnetic field was at similar levels.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1029/2020JA027802
 Degree: -

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Title: Journal of Geophysical Research: Space Physics
  Other : JGR-A
  Abbreviation : J. Geophys. Res. - A
Source Genre: Journal
 Creator(s):
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 125 (4) Sequence Number: e2020JA027802 Start / End Page: - Identifier: ISSN: 0148-0227
CoNE: https://pure.mpg.de/cone/journals/resource/991042728714264