Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm32b..07s&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SM32B-07
Physics
2740 Magnetospheric Configuration And Dynamics, 2744 Magnetotail, 2760 Plasma Convection, 2764 Plasma Sheet
Scientific paper
We present an overview of the observations and implications on the magnetospheric dynamics of fast plasma flows observed in the near and distant plasma sheet, in the plasma sheet boundary layers and in the lobes. Emphasis is given to both bursty bulk flows and long lasting quasi-stationary flows. Bursty bulk flows are discussed in terms of occurrence, location and effect on particle, energy and magnetic flux transport from the tail to the inner magnetosphere. Their relationship with auroral streamer, substorm onset/expansion phase, and with the sporadic injections of plasma sheet ions into the auroral bulge are critically examined. We distinguish between parallel flows, which can be generated in regions largely separated from the observation point from perpendicular flows measured as local effects. Examples of ion flows in the magnetotail lobe, both sunward and anti-sunward, from solar or ionospheric origin are analyzed. The Geotail data base is used to statistically define the location where the main transition from earthward to tailward flows occur inside the plasma sheet. Large differences between statistical results and case studies are analyzed. Finally we review the recent observations of long lasting tailward flows observed at distances > 100 Re, like a planetary wind, during the course of disturbed periods.
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