Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm11a0291t&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SM11A-0291
Physics
2740 Magnetospheric Configuration And Dynamics, 2744 Magnetotail, 2753 Numerical Modeling, 2788 Magnetic Storms And Substorms (7954), 2794 Instruments And Techniques
Scientific paper
We present first results of the magnetospheric magnetic field modeling, based on large sets of spacecraft data and a high-resolution approximation for the contribution from equatorial currents. In the new approach, the field is expanded into a sum of orthogonal basic modules, making it possible to replicate a variety of arbitrary current distributions in the equatorial plane and to naturally include the noon-midnight and dawn-dusk asymmetry. Combined with the existing method to model the magnetic effects of field-aligned currents [Tsyganenko, JGR, v.107(A8), 2002], the new approach provides a way to consistently and flexibly represent contributions from both the tail and symmetrical/partial ring currents. In particular, it offers a convenient scheme to more realistically reconstruct the structure of the inner magnetosphere during geomagnetic storms. In our first experiments, the new model was fitted to subsets of data from Geotail, Polar, Cluster, IMP-8, Goes-8,-9,-10, and -12 spacecraft, corresponding to various bins of interplanetary parameters. The reconstructed global distribution of the magnetospheric field showed an orderly dependence on the IMF orientation and magnitude, in agreement with previous modeling studies. It also revealed an interesting azimuthal structure of the equatorial tail current sheet during intervals of strong northward and southward IMF Bz, implying possible relationship with the tail bifurcation and "theta" auroras in the first case, and with the substorm effects in the second case.
Sitnov Mikhail I.
Tsyganenko Nikolai A.
No associations
LandOfFree
Magnetospheric Configurations Derived From a High-Resolution Data-Based Model of External Field Sources 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 Magnetospheric Configurations Derived From a High-Resolution Data-Based Model of External Field Sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetospheric Configurations Derived From a High-Resolution Data-Based Model of External Field Sources will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-969517