Does high-latitude ionospheric electrodynamics exhibit hemispheric mirror symmetry?
Abstract y J ⋅ E (in general not equal to Joule heating η J 2) and ionospheric conductances by combining two new empirical models of the high-latitude ionospheric electric potential and ionospheric currents that are derived in a mutually consistent fashion: these models do not assume any form of symmetry between the two hemispheres; are based on Apex magnetic coordinates (denoted Apex), spherical harmonics, and the same model input parameters; and are derived exclusively from convection and magnetic field measurements made by the Swarm and CHAMP satellites. The model source code is open source and publicly available. Comparison of high-latitude distributions of electromagnetic work in each hemisphere as functions of dipole tilt and interplanetary magnetic field clock angle indicates that the typical assumption of mirror symmetry is largely justified. Model predictions of ionospheric Hall and Pedersen conductances exhibit a degree of symmetry, but clearly asymmetric responses to dipole tilt and solar wind driving conditions are also identified. The distinction between electromagnetic work and Joule heating allows us to identify where and under what conditions the assumption that the neutral wind corotates with the Earth is not likely to be physically consistent with predicted Hall and Pedersen conductances.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Does high-latitude ionospheric electrodynamics exhibit hemispheric mirror symmetry? ; volume:42 ; number:1 ; year:2024 ; pages:229-253 ; extent:25
Annales geophysicae ; 42, Heft 1 (2024), 229-253 (gesamt 25)
- Creator
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Hatch, Spencer Mark
Vanhamäki, Heikki
Laundal, Karl Magnus
Reistad, Jone Peter
Burchill, Johnathan K.
Lomidze, Levan
Knudsen, David J.
Madelaire, Michael
Tesfaw, Habtamu
- DOI
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10.5194/angeo-42-229-2024
- URN
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urn:nbn:de:101:1-2406060418033.720003053159
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:47 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Hatch, Spencer Mark
- Vanhamäki, Heikki
- Laundal, Karl Magnus
- Reistad, Jone Peter
- Burchill, Johnathan K.
- Lomidze, Levan
- Knudsen, David J.
- Madelaire, Michael
- Tesfaw, Habtamu
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