Controlling Factors of Region 2 Field-Aligned Current and its Relationship to the Ring Current: Model Results

Details Controlling Factors of Region 2 Field-Aligned Current and its Relationship to the Ring Current: Model Results Controlling Factors of Region 2 Field-Aligned Current and its Relationship to the Ring Current: Model Results

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsm51a..03z&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM51A-03

Physics

2721 Field-Aligned Currents And Current Systems (2409), 2736 Magnetosphere/Ionosphere Interactions (2431), 2753 Numerical Modeling, 2778 Ring Current

Scientific paper

Using the Comprehensive Ring Current Model (CRCM), which includes magnetosphere and ionosphere coupling by solving the kinetic equation of ring current protons and the closure of the electric currents between the two regions, we have investigated the effects of polar cap potential drop, ionospheric conductivity, plasma sheet density and different magnetic field models on the development of Region 2 (R2) field-aligned currents (FAC), and the relationship between R2 FACs and the ring current. The simulated Region 2 FAC results for two different magnetic storm events (22 April 2001 and 21 October 2001) capture major characteristics of the Iridium measurements. It is shown that an increase in polar cap potential, ionospheric conductivity or plasma sheet density generally results in an increase in Region 2 FACs' intensity, but R2 FACs display different local time and latitudinal distributions for changes in each parameter due to the different mechanisms involved. The CRCM run in the Tsyganenko 2004 magnetic field model for storm times (T04S), which includes a partial ring current, produces the dawn-dusk asymmetry in R2 FACs during geomagnetic active times, as reported by Anderson et al. [2005]: more intense currents flow into the ionosphere around dusk, compared to those that flow out of the ionosphere around dawn, and the dusk currents shift further equatorward than do the dawn currents. Our simulation indicates that the dawn-dusk asymmetry in R2 FACs can be explained by the asymmetric inflation of magnetic field at dusk.

Affiliated with

Also associated with

No associations

Rating

Controlling Factors of Region 2 Field-Aligned Current and its Relationship to the Ring Current: Model Results 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 Controlling Factors of Region 2 Field-Aligned Current and its Relationship to the Ring Current: Model Results, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controlling Factors of Region 2 Field-Aligned Current and its Relationship to the Ring Current: Model Results will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1027776