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Detailed Reference Information |
Nishitani, N., Ogawa, T., Pinnock, M., Freeman, M.P., Dudeney, J.R., Villain, J., Baker, K.B., Sato, N., Yamagishi, H. and Matsumoto, H. (1999). A very large scale flow burst observed by the SuperDARN radars. Journal of Geophysical Research 104: doi: 10.1029/1999JA900241. issn: 0148-0227. |
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We examined the dynamics of the ionospheric plasma in the dayside sector by using the HF radar data at Iceland West and at Finland from 1100 to 1230 UT on September 5, 1995. During that period, the solar wind density was high and the IMF was strongly southward. The dayside magnetopause was highly compressed nearly to the geosynchronous orbit. The two radars simultaneously detected a poleward flow burst in the noon sector which, assuming uniformity of flow in the region of the data gap (1.5 MLT) between the two radars, showed a magnetic local time extent of 5 hours. This local time extent is 2 to 3 hours wider than previous results. The maximum poleward plasma velocity of the flow burst is ~750 m/s, and the latitudinal size of the flow burst region is ~100 to 200 km. This flow burst region initially expanded in longitude up to 5 hours, and then shifted poleward with a phase speed of 400 to 670 m/s. The flow burst has a duration of ~20 min. This large-scale poleward flow burst is likely to be due to large-scale reconnection occurring at the dayside magnetopause and subsequent convection as the magnetic field lines are transported across the polar cap. ¿ 1999 American Geophysical Union |
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Abstract |
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Keywords
Ionosphere, Ionosphere/magnetosphere interactions, Ionosphere, Electric fields, Magnetospheric Physics, Magnetopause, cusp, and boundary layers, Magnetospheric Physics, Magnetospheric configuration and dynamics, Interplanetary Physics, Ejecta, driver gases, and magnetic clouds, Interplanetary Physics, Interplanetary magnetic fields, Space Plasma Physics, Numerical simulation studies |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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