Geospheric Expansion into the Plasma Sheet with Solar Wind Driving

Details Geospheric Expansion into the Plasma Sheet with Solar Wind Driving Geospheric Expansion into the Plasma Sheet with Solar Wind Driving

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm52a09g&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM52A-09

Physics

2431 Ionosphere/Magnetosphere Interactions (2736), 2736 Magnetosphere/Ionosphere Interactions

Scientific paper

Understanding and specification of the role of ionospheric plasma in the coupled magnetosphere-ionosphere system has become increasingly important as ISTP Geotail and Polar observations continue to report on the substantial, and sometimes dominate, terrestrial plasma components in critical dynamic regions of the system. Geotail observations have shown increased O+ content in the near and distant magnetotail lobes during intervals of sustained southward IMF. Polar has established that the significant, persistent flow of polar wind plasma escaping through the lobes contains more O+ and molecular species than originally predicted, increasing for enhanced solar wind pressure. Taken together, the accomplishments in these areas point to a clear connection between variations in the terrestrial ion source and a corresponding consequence in plasma sheet content. Missing thus far are the confirming, simultaneous observations between the spacecraft, which could point to electrodynamic as well as mechanical elements connecting the two systems. Here we take the first step toward bringing observations from the two spacecraft together by exploring integrated measures of plasma content at the ionosphere source, the high altitude polar lobes, and the near and distant equatorial plasma sheet under a variety of solar input conditions.

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