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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    Title :

    Helium in the polar wind


    Contributors:
    Gombosi, T.I. (author) / Kerr, L.K. (author) / Nagy, A.F. (author) / Cannata, R.W. (author)

    Published in:

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


    Publication date :

    1991-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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