The effect of the vertical ExB drift on the longitudinal plasma density structure in low-mid latitudes

Details The effect of the vertical ExB drift on the longitudinal plasma density structure in low-mid latitudes The effect of the vertical ExB drift on the longitudinal plasma density structure in low-mid latitudes

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsa11b..04k&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA11B-04

Physics

2411 Electric Fields (2712), 2415 Equatorial Ionosphere, 2427 Ionosphere/Atmosphere Interactions (0335), 2437 Ionospheric Dynamics

Scientific paper

We investigate the temporal evolution of the longitudinally periodic plasma density structure in low-mid latitudes and its association with the vertical ExB drift pattern using the ROCSAT-1, TIMED/GUVI, DMSP, and FORMOSAT- 3/COSMIC data. The preliminary ROCSAT-1 observations show that the signatures of the periodic density structure occur before 0900 LT and are well correlated with the morphology of the vertical ExB drift. The density peaks develop in the regions where the upward ion velocity in the morning is larger than that in the neighboring longitudes. The growth of the density peaks in the afternoon depends on the persistence of the upward ExB drift. We will further investigate the seasonal, local time, and altitudinal variations of the density structure and ExB drift pattern by analyzing multiple satellite data. We will also conduct the SAMI2 model simulations to investigate the impact of the vertical ExB drift in the morning on the longitudinal density structure in the afternoon and at night.

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