Ion - Neutral Interactions in the Polar E-region

Details Ion - Neutral Interactions in the Polar E-region Ion - Neutral Interactions in the Polar E-region

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa51c1645l&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA51C-1645

Physics

[0358] Atmospheric Composition And Structure / Thermosphere: Energy Deposition, [6929] Radio Science / Ionospheric Physics

Scientific paper

A new technique is developed to derive neutral wind estimates in the E-region from incoherent scatter radar measurements. It is demonstrated that the possible neutral wind values derived from the ion momentum equation is constrained to lie along a line. A minimum neutral wind can be directly calculated from the observations with no dependency on collision frequency. Further analysis shows that the minimum wind lies in the direction of the local current and the uncertainty of collision frequency only affects the neutral wind in the JxB direction. This indicates that adapting a current density coordinate frame can improve the accuracy in neutral wind analysis from ISR measurement. A real practice of this technique is demonstrated with the Sondrestrom incoherent scatter radar data measurements of the polar E region. Radar data analyses shows that ion velocity magnitude in the E region can exceed that in the F region at times due to the neutral wind effect.

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