Atomic and molecular ion dynamics during equatorial spread F
Article first published online: 23 MAY 2009
Copyright 2009 by the American Geophysical Union.
Geophysical Research Letters
Volume 36, Issue 10, May 2009
How to Cite
2009), Atomic and molecular ion dynamics during equatorial spread F, Geophys. Res. Lett., 36, L10106, doi:10.1029/2009GL037675., , and (
- Issue published online: 23 MAY 2009
- Article first published online: 23 MAY 2009
- Manuscript Accepted: 20 APR 2009
- Manuscript Revised: 31 MAR 2009
- Manuscript Received: 9 FEB 2009
- spread F;
- equatorial dynamics;
- ionospheric ions
 The first simulation study of atomic and molecular ion dynamics during equatorial spread F (ESF) is presented. The simulation results are based on the Naval Research Laboratory (NRL) SAMI3/ESF three-dimensional code. The key findings are the following: (1) a ‘super fountain’ effect can occur in the initial stage of ESF with upward ion velocities ∼1 km/s, (2) plasma depletions can be enhanced by the ‘drainage’ of H+ ions along the geomagnetic field, and (3) molecular ions (e.g., NO+) can be ‘lifted’ to high altitudes (≳400 km). We compare these results with satellite observations where applicable.