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    Martian Ionospheric Magnetic Fluctuations Below 200 km

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    Name:
    JGR Space Physics - 2022 - Esman ...
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    2.440Mb
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    Final Published Version
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    Author
    Esman, T.M.
    Espley, J.
    Gruesbeck, J.
    Fowler, C.M.
    Xu, S.
    Elrod, M.
    Harada, Y.
    Giacalone, J.
    Affiliation
    Lunar and Planetary Laboratory, University of Arizona
    Issue Date
    2022
    Keywords
    electron precipitation
    ionosphere
    magnetic fields
    Mars
    waves
    
    Metadata
    Show full item record
    Publisher
    John Wiley and Sons Inc
    Citation
    Esman, T. M., Espley, J., Gruesbeck, J., Fowler, C. M., Xu, S., Elrod, M., Harada, Y., & Giacalone, J. (2022). Martian Ionospheric Magnetic Fluctuations Below 200 km. Journal of Geophysical Research: Space Physics, 127(9).
    Journal
    Journal of Geophysical Research: Space Physics
    Rights
    Copyright © 2022. American Geophysical Union. All Rights Reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    We conduct a search for 5–16 Hz magnetic waves below 200 km and within the Martian ionosphere using data from multiple instruments onboard the Mars Atmosphere and Volatile EvolutioN mission spacecraft. We present a case study and an analysis of the 54 identified events to establish trends. Nearly half the wave events occur near the cusps of strong crustal magnetic fields (CMFs). The stronger regions have fewer events and may be a result of stronger CMFs preventing draped field lines from reaching lower altitudes. A majority of the observed magnetic waves occur on the nightside, are associated with greater fluxes of electrons traveling downward along the local magnetic field compared to those traveling upward, and correspond to increases in thermal plasma density. These aspects indicate electron precipitation was present during these wave events. We conclude that the waves are observed under magnetic field conditions favorable for the penetration of electrons and waves into the lower ionosphere, but that the electron precipitation cannot solely account for the waves or plasma changes. © 2022. American Geophysical Union. All Rights Reserved.
    Note
    6 month embargo; first published: 11 September 2022
    ISSN
    2169-9380
    DOI
    10.1029/2022JA030470
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1029/2022JA030470
    Scopus Count
    Collections
    UA Faculty Publications

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