Dynamics of three-dimensional plasma clouds with coupling to the background ionosphere

Details Dynamics of three-dimensional plasma clouds with coupling to the background ionosphere Dynamics of three-dimensional plasma clouds with coupling to the background ionosphere

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.6331m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A4, p. 6331-6344

Statistics

Computation

3

Coupled Modes, E Region, F Region, Field Aligned Currents, Ionospheric Electron Density, Plasma Clouds, Wave Interaction, Computational Grids, Geophysics, Plasma Dynamics, Three Dimensional Models, Time Dependence

Scientific paper

A three-dimensional, time-dependent model with a two-grid system was developed to study the expansion of a plasma cloud in the F region and topside ionosphere. The model maintains an adequate resolution for the released cloud motion and its interaction with the immediate environment, and it includes the effect due to the coupling with the distant part of the ionosphere (i.e., E region). Simulations were performed using realistic background ionospheric density profiles in both the E and F regions. The results show that the cloud coupling to the underlying E region affects the perpendicular cloud motion the most. The distant coupling acts to reduce the perturbation potential and perpendicular velocity and delays or eliminates the striations. These simulation results are consistent with simple analytical approximations. The simulation results also show that the distant coupling has a very small effect on 'localized' phenomena, such as the cloud expansion along the B RIGHT ARROW field and the electrostatic snowplow. The cloud-induced electric potential is attenuated in the lower E region. The electrons flow along the B RIGHT ARROW field, carrying the current to the E region and back to the cloud. The current closure is demonstrated in three dimensions for the first time for such a problem. The perpendicular current flowing through the plasma cloud is closed by the field-aligned electron current and the background perpendicular (mainly Pedersen) current in both the E and F regions. The 'image cloud' formation in t he E region is also clearly demonstrated. The variation of the density change in the 'image cloud' along the B RIGHT ARROW field and the features of the image cloud are shown.

Affiliated with

Also associated with

No associations

Rating

Dynamics of three-dimensional plasma clouds with coupling to the background ionosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dynamics of three-dimensional plasma clouds with coupling to the background ionosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamics of three-dimensional plasma clouds with coupling to the background ionosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1258852