Abstract In a model of the plasmasphere, coupled time-dependent continuity, momentum and energy equations are solved for thermal O+, H+ and electrons. The field-aligned mass flow coupling and thermal coupling of conjugate ionsopheres via the protonosphere are studied. For solstice conditions, thermal coupling between conjugate hemispheres gives rise to very strong upward flows of O+ in the topside ionosphere of the summer hemisphere at the time of sunrise in the conjugate (winter) ionosphere; a less marked effect (but with downward flow) occurs in the summer ionosphere at winter sunset. In addition, there are strong upward and downward flows of O+ at local sunrise and sunset, respectively, in both hemispheres. At both L = 1.5 and L = 3, the 24-hour time-integrated interhemispheric H+ flux is in the summer - winter direction. At L = 1.5 its magnitude is in good agreement with the magnitude of the time- integrated field-aligned plasma (O+ + H+) flux at 1000 km altitude; there is no such agreement at L = 3.


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    Title :

    Field-aligned plasmaspheric flows at moderate latitudes


    Contributors:

    Published in:

    Publication date :

    1987-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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