Statistics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm31d..04o&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SM31D-04
Statistics
2704 Auroral Phenomena (2407), 2716 Energetic Particles: Precipitating, 2736 Magnetosphere/Ionosphere Interactions (2431), 4475 Scaling: Spatial And Temporal (1872, 3270, 4277), 4490 Turbulence (3379, 4568, 7863)
Scientific paper
It is well known that auroral radio wave absorption, as measured by riometers, consists of periods of relative quiescence which are interrupted by short bursts of activity. Such patterns in activity are observed in systems ranging from the stock market to turbulence, i.e. they exhibit intermittency. In the case of the auroral absorption it has also been found that intermittency strongly depends on the magnetic local time, being largest in the nighttime sector. This can be interpreted as indicating that the precipitating particles responsible of the absorption exhibit intermittency, especially near the substorm eye, where the level of turbulence increases. Here, different techniques to determine intermittency of auroral absorption measured by a riometer at South Pole (-90°S) are compared. The techniques are (i) the standard Castings formulation, (ii) the Local Intermittency Measure, (iii) the superstatistic, and (iv) the non-extensive statistics. It is shown that results obtained using the superstatistic and non-extensive statistic techniques confirm previously published results for auroral absorption at South Pole using the Castings and the Local Intermittency Measure techniques. Furthermore, a preliminary comparison between techniques indicates technique differences seem to be more related to the conceptual approach of each one rather than to the numerical results given by them.
Foppiano Alberto J.
Ovalle Elías M.
Stepanova M.
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