Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm51b0534k&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM51B-0534
Physics
0515 Cellular Automata, 0550 Model Verification And Validation, 2704 Auroral Phenomena (2407), 2736 Magnetosphere/Ionosphere Interactions (2431), 2788 Magnetic Storms And Substorms (7954)
Scientific paper
Variability of auroral structures is a manifestation of the magnetosphere-ionosphere plasma dynamics. During the last decade the complexity of magnetosphere-ionosphere plasma has been widely discussed in numerous papers. The most popular approaches are based on turbulence or/and self-organized criticality paradigms. However, there is no clear evidence that the dynamics during the discussed events is really organization, and not disorganization. The problem is that the magnetosphere-ionosphere system is an open non-equilibrium system, therefore classical thermodynamics is not directly applicable. Here we use an approach based on the S-theorem by Yu.L. Klimontovich. This approach allows us to compare the ordering which characterize the current (non- equilibrium) state of the system with experimental data. The considered characteristic is an analogy of entropy which has been extended to non- equilibrium states. Television observations of the auroral structure during substorm activation at the Barentsburg observatory (Svalbard) have been used as a data set. Dependence of the ordering on the spatial scale has been analyzed. We found that the ordering of the aurora increases during the substorm development. The same approach has been applied to data sets generated by cellular automata models. Evolution of the systems in time and dependence on external control parameters are compared and discussed. Acknowledgements. This work was supported by grant No 171076/V30 of the Norwegian Research Council and partly by the Division of Physical Sciences of Russian Academy of Science.
Kozelov Boris V.
Rypdal Kristoffer
No associations
LandOfFree
Relative Order of Auroral Transient Structure During Substorm Activation 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 Relative Order of Auroral Transient Structure During Substorm Activation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relative Order of Auroral Transient Structure During Substorm Activation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1426607