Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsa23b1477s&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SA23B-1477
Physics
[0619] Electromagnetics / Electromagnetic Theory, [2475] Ionosphere / Polar Cap Ionosphere, [2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions
Scientific paper
A numerical investigation of an aperture in a plane conductor reveals an electric field distribution normal to the aperture strikingly similar to the Birkeland current system and an electric field in the aperture plane that is consistent with the idealized convection pattern in the Earth's polar ionosphere. Based upon the similarity of electromagnetic fields in an aperture to the polar ionosphere a model is presented where open magnetic fields lines in the polar cap are treated as an effective aperture. The use of an effective aperture in the polar ionosphere correctly predicts the phase velocity and frequency dependence of reflected power for Alfvén waves incident upon the polar cap during the main phase of a geomagnetic substorm as measured by FAST. The resonances of the proposed system are consistent with ground based magnetometer measurements and the computed transmission spectra of the Ionospheric Alfvén Resonator (IAR). The physical and mathematical arguments supporting the association between an aperture and the polar ionosphere will be presented along with a comparison between predictions and measurements.
Heelis Roderick A.
Stoneback R.
No associations
LandOfFree
Effective Aperture Behavior of Open Magnetic Field Lines in the Geospace Environment 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 Effective Aperture Behavior of Open Magnetic Field Lines in the Geospace Environment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effective Aperture Behavior of Open Magnetic Field Lines in the Geospace Environment will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1779028