Abstract The coupled, time-dependent continuity, momentum and energy equations for four charged species (H+, He+, O+ and electrons) moving through a stationary upper neutral atmosphere (composed of O2, N2, O, He, H) were solved along open geomagnetic field lines using a modified version of the /5/ model. The thermospheric densities and temperatures, obtained from the MSIS-86 model /7/, were used to calculate neutral-ion sources, sinks, and collision frequencies. The various cross sections and conductivities employed by the /5/ model were also updated. The paper presents the first time-dependent solutions for the He+ component of the polar wind. Special attention is paid to the solar cycle variation of the ion upflows.


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    Titel :

    Helium in the polar wind


    Beteiligte:
    Gombosi, T.I. (Autor:in) / Kerr, L.K. (Autor:in) / Nagy, A.F. (Autor:in) / Cannata, R.W. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 12 , 6 ; 183-186


    Erscheinungsdatum :

    1991-01-01


    Format / Umfang :

    4 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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