KUKU

KU ScholarWorks

  • myKU
  • Email
  • Enroll & Pay
  • KU Directory
    • Login
    View Item 
    •   KU ScholarWorks
    • Physics & Astronomy
    • Physics & Astronomy Scholarly Works
    • View Item
    •   KU ScholarWorks
    • Physics & Astronomy
    • Physics & Astronomy Scholarly Works
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Pressure Gradients Driving Ion Transport in the Topside Martian Atmosphere

    Thumbnail
    View/Open
    Hamil_2019.pdf (1.840Mb)
    Issue Date
    2019-07-04
    Author
    Hamil, O.
    Cravens, T. E.
    Rahmati, A.
    Connerney, J. E. P.
    Andersson, L.
    Publisher
    Wiley
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    © 2019. American Geophysical Union. All Rights Reserved.
    Metadata
    Show full item record
    Abstract
    Magnetic and thermal pressure gradient forces drive plasma flow in the topside ionosphere of Mars. Some of this flow can contribute to ion loss from the planet and thus affect atmospheric evolution. MAVEN measurements of the magnetic field, electron density, and electron temperature, taken over a 3‐year time period, are used to obtain averaged magnetic and thermal pressures in the topside ionosphere versus altitude, solar zenith angle, and latitude. Magnetic pressures are several times greater than thermal pressures for altitudes greater than about 300 km; that is, the plasma beta is less than one. The total pressure increases with altitude in the ionosphere and decreases with increasing solar zenith angle. Using these pressure patterns in the dayside ionosphere to estimate the pressure gradient force in the fluid momentum equation, we estimate horizontal day‐to‐night plasma flow speeds of a few kilometers per second near 400 km.
    Description
    An edited version of this paper was published by AGU. Copyright 2019 American Geophysical Union.
    URI
    http://hdl.handle.net/1808/31451
    DOI
    https://doi.org/10.1029/2019JA026670
    Collections
    • Physics & Astronomy Scholarly Works [1713]
    Citation
    Hamil, O., Cravens, T. E., Rahmati, A., Connerney, J. E. P., & Andersson, L. (2019). Pressure gradients driving ion transport in the topside Martian atmosphere. Journal of Geophysical Research: Space Physics, 124, 6117– 6126. https://doi.org/10.1029/2019JA026670

    Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.


    We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.


    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    Browse

    All of KU ScholarWorksCommunities & CollectionsThis Collection

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    The University of Kansas
      Contact KU ScholarWorks
    Lawrence, KS | Maps
     
    • Academics
    • Admission
    • Alumni
    • Athletics
    • Campuses
    • Giving
    • Jobs

    The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities. The following person has been designated to handle inquiries regarding the non-discrimination policies: Director of the Office of Institutional Opportunity and Access, IOA@ku.edu, 1246 W. Campus Road, Room 153A, Lawrence, KS, 66045, (785)864-6414, 711 TTY.

     Contact KU
    Lawrence, KS | Maps