• Login
    View Item 
    •   Home
    • University of Alaska Fairbanks
    • UAF Graduate School
    • Older Theses Not Clearly Affiliated with a Current College
    • View Item
    •   Home
    • University of Alaska Fairbanks
    • UAF Graduate School
    • Older Theses Not Clearly Affiliated with a Current College
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Scholarworks@UACommunitiesPublication DateAuthorsTitlesSubjectsTypeThis CollectionPublication DateAuthorsTitlesSubjectsType

    My Account

    Login

    First Time Submitters, Register Here

    Register

    Statistics

    Display statistics

    A theoretical study of type Pi 2 geomagnetic micropulsations

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Longnecker_D_1983.pdf
    Size:
    82.87Mb
    Format:
    PDF
    Download
    Author
    Longenecker, David U.
    Keyword
    Geomagnetic micropulsations
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/7662
    Abstract
    Pi 2 pulsations are long period magnetic oscillations superimposed onto the geomagnetic field. They are usually associated with the onset of auroral substorms. To gain an understanding of the generation of Pi 2 pulsations, an instability mechanism and a transient response mechanism are studied. The instability mechanism results from a deceleration of magnetospheric convection in the plasma sheet while the transient response mechanism arises from an enhancement of magnetospheric convection in the plasma sheet. Both mechanisms are reviewed and a one-dimensional wave equation is solved numerically to model the transient response mechanism. The numerical computations indicate that a rapid enhancement of the magnetospheric convection will launch Alfven waves which will produce an oscillating current in the ionosphere. Model results for the transient response mechanism indicate that the oscillating current can produce Pi 2 pulsations with periods that compare favorably with ground based measurements.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 1983
    Date
    1983-05
    Type
    Thesis
    Collections
    Older Theses Not Clearly Affiliated with a Current College
    Theses (Unassigned)

    entitlement

     
    ABOUT US|HELP|BROWSE|ADVANCED SEARCH

    The University of Alaska Fairbanks is an affirmative action/equal opportunity employer and educational institution and is a part of the University of Alaska system.

    ©UAF 2013 - 2023 | Questions? ua-scholarworks@alaska.edu | Last modified: September 25, 2019

    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.