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  The Role of the Upper Atmosphere for Dawn-Dusk Differences in the Coupled Magnetosphere-Ionosphere-Thermosphere System

Förster, M., Doornbos, E., & Haaland, S. (2017). The Role of the Upper Atmosphere for Dawn-Dusk Differences in the Coupled Magnetosphere-Ionosphere-Thermosphere System. In S. Haaland, A. Runov, & C. Forsyth (Eds.), Dawn-Dusk Asymmetries in Planetary Plasma Environments (pp. 125-141). Hoboken: Wiley.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0000-431E-4 Version Permalink: https://hdl.handle.net/21.11116/0000-0007-1C30-4
Genre: Book Chapter

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 Creators:
Förster, Matthias, Author
Doornbos, Eelco, Author
Haaland, Stein1, Author           
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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 MPIS_PROJECTS: Cluster
 Abstract: The interaction between the solar wind with its inherent interplanetary magnetic field (IMF) and the geomagnetic field sets up a large-scale plasma circulation in the Earth's magnetosphere and the magnetically tightly connected ionosphere. The ionospheric ion drift at polar latitudes accelerates the neutral gas as a nondivergent momentum source primarily in force balance with pressure gradients, which are mainly directed from afternoon to midnight. The high-latitude neutral wind circulation is essentially modified by apparent forces due to Earth's rotation (Coriolis and centrifugal forces), while advection and viscous forces can significantly contribute. The apparent forces affect the dawn and dusk side asymmetrically, favoring a large dusk-side neutral wind vortex that dominates over the dawn-side vorticity cell. The IMF By component induces additional dawn-dusk differences in both ion drift and neutral wind patterns. Nonuniformities and steep gradients of the ionospheric conductivity can further modify locally the ionospheric convection and neutral wind circulation. Feedback effects of the neutral wind dynamics and its embedded ionosphere modify to a certain degree the large-scale magnetospheric convection, which includes dawn-dusk asymmetries of their behavior.

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Language(s): eng - English
 Dates: 2018-01-312017
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/9781119216346.ch10
 Degree: -

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Title: Dawn-Dusk Asymmetries in Planetary Plasma Environments
Source Genre: Book
 Creator(s):
Haaland, Stein, Editor
Runov, Andrei, Editor
Forsyth, Colin, Editor
Affiliations:
-
Publ. Info: Hoboken : Wiley
Pages: 376 Volume / Issue: - Sequence Number: - Start / End Page: 125 - 141 Identifier: ISBN: 978-1-119-21632-2