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Record Details

Record 26 of 7796
Saturation of the Electric Field Transmitted to the Magnetosphere
External Online Source: doi:10.1029/2009JA015091
Author and Affiliation:
Lyatsky, Wladislaw(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Khazanov, George V.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Slavin, James A.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: We reexamined the processes leading to saturation of the electric field, transmitted into the Earth's ionosphere from the solar wind, incorporating features of the coupled system previously ignored. We took into account that the electric field is transmitted into the ionosphere through a region of open field lines, and that the ionospheric conductivity in the polar cap and auroral zone may be different. Penetration of the electric field into the magnetosphere is linked with the generation of the Alfven wave, going out from the ionosphere into the solar wind and being coupled with the field-aligned currents at the boundary of the open field limes. The electric field of the outgoing Alfven wave reduces the original electric field and provides the saturation effect in the electric field and currents during strong geomagnetic disturbances, associated with increasing ionospheric conductivity. The electric field and field-aligned currents of this Alfven wave are dependent on the ionospheric and solar wind parameters and may significantly affect the electric field and field-aligned currents, generated in the polar ionosphere. Estimating the magnitude of the saturation effect in the electric field and field-aligned currents allows us to improve the correlation between solar wind parameters and resulting disturbances in the Earth's magnetosphere.
Publication Date: Aug 20, 2010
Document ID:
20100032909
(Acquired Sep 16, 2010)
Subject Category: GEOPHYSICS
Document Type: Journal Article
Publication Information: Journal of Geophysical Research; Volume 115
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 11p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: MAGNETOHYDRODYNAMIC WAVES; MAGNETIC DISTURBANCES; ELECTRIC FIELDS; EARTH MAGNETOSPHERE; EARTH IONOSPHERE; SATURATION; SOLAR WIND; IONOSPHERIC CONDUCTIVITY; POLAR CAPS; AURORAL ZONES; EARTH (PLANET)
Availability Source: Other Sources
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