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Equinoctial Asymmetry in the Upper Ionosphere: Comparison of Satellite Observations and Models
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2023
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Source: Journal of Geophysical Research: Space Physics, 128(5)
[PDF-12.37 MB]
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Journal Title:Journal of Geophysical Research: Space Physics
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Description:The terrestrial ionosphere displays significant equinoctial asymmetry despite the upper atmosphere receiving similar levels of solar ionization energy at a given location and local time in March and September during similar solar activity conditions. This intriguing feature is not well understood or modeled, particularly in the upper ionosphere, and causes of the asymmetry are not fully established and quantified. Yet, their study is important to provide better insights into the atmosphere-ionosphere coupling processes. Analysis of Langmuir probe data from ESA's Swarm B satellite at ∼525 km altitude reveals that the daytime electron density is larger for all latitudes during the March equinox than during the September equinox, while
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Source:Journal of Geophysical Research: Space Physics, 128(5)
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DOI:
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ISSN:2169-9380;2169-9402;
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Rights Information:CC BY-NC-ND
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