Physics
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3549s&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 23, p. 3549-3552
Physics
35
Ionosphere: Ionosphere/Magnetosphere Interactions, Ionosphere: Ionospheric Dynamics, Ionosphere: Plasma Convection, Ionosphere: Polar Cap Ionosphere
Scientific paper
We show the response of the Earth's magnetosphere and ionosphere to a density pulse in the solar wind using a global 3D MHD simulation model. Flow vortices are generated in the ionosphere and they exhibit many properties similar to those observed during impulsive traveling convection vortices. Two oppositely rotating flow vortices are formed at about 70° magnetic latitude near noon. They separate and move down the morning and evening flanks, greatly weakening as they pass the terminator. Meanwhile a second pair of flow vortices appears at noon at a slightly higher latitude and with opposite flow directions than the first pair. The second pair follows the first and also fades as it reaches the nightside. The results are interpreted as a hydromagnetic wave propagating in the inhomogeneous magnetosphere plasma.
Fedder Joel A.
Hughes Jeffrey W.
Lyon John G.
Slinker Steven P.
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