Physics
Scientific paper
Jun 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.2101t&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 12, p. 2101-2104
Physics
12
Ionosphere: Ionosphere/Magnetosphere Interactions, Magnetospheric Physics: Auroral Phenomena, Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Solar Wind Interactions With Unmagnetized Bodies
Scientific paper
The properties of AU and PC data were analyzed with different methods. It is shown that the dynamical behavior of the AU and PC time series, as analyzed by the structure function (SF), are very similar, while the SF of the AL time series shows different behavior. The SF of the AL data has a slope of 0.5 up to about 2 hours, after which it quickly decreases to about 0.1. On the other hand the slope of the SFs of AU and PC data continuously decreases to about 0.2, and in a longer time scale. It is suggested that the dissipative auroral electrojet currents have a characteristic time scale of 2 hours, and this underlies the AL dynamics. In contrast with this, the nondissipative Hall currents that most influence the AU and PC dynamics, do not seem to have a distinct characteristic time scale. However, the cross-correlation between the PC and AL indices is higher than that of the PC and AU indices, especially during wintertime. This is argued to result from the polar cap currents being more interconnected with the westward electrojets than with the eastward electrojets, in spite of the difference in their dynamic behaviors.
Takalo Jouni
Timonen Jussi
No associations
LandOfFree
Comparison of the dynamics of the AU and PC indices 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 Comparison of the dynamics of the AU and PC indices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparison of the dynamics of the AU and PC indices will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1332144