Other
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm31e..06k&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SM31E-06
Other
2487 Wave Propagation (0689, 3285, 4275, 4455, 6934), 2736 Magnetosphere/Ionosphere Interactions (2431), 2752 Mhd Waves And Instabilities (2149, 6050, 7836), 2772 Plasma Waves And Instabilities (2471)
Scientific paper
Well-defined Pc 1-2 type geomagnetic pulsations and poleward ducting have been observed from a ground array of search-coil magnetometers in the morning sector of Antarctica. With extensive coverage from geomagnetic latitudes of 62° to 87° and good alignment along the magnetic meridian, the five search-coil magnetometers operating aboard American Automated Geophysical Observatories (AGOs) and British Antarctic Survey (BAS) showed very clear poleward ducting with spectral power attenuation of the ULF waves. Halley Station, located at the lowest latitude, observed the highest spectral wave power and well-defined band-limited signatures with the same wave event, showing less wave power, found at the other four remote stations at higher latitudes. This is a clear implication of the poleward ducting of the electromagnetic ion cyclotron (EMIC) waves in the ionospheric waveguide, which are generated from the equatorial magnetosphere along the geomagnetic field lines and transmitted to the ionosphere. Since the wave event was observed over a very wide range in latitude, the observation of the wave propagation will provide significant information on the ULF wave ducting in the waveguide and the source region. This study focuses on the ducting event by comparing the attenuation in the spectral power, the time-delays, and the polarization of the waves recorded from the ground stations. In addition, CHAMP satellite data analysis is also presented to validate the wave ducting.
Engebretson Mark
Kim Hungsoo
Lessard Marc
No associations
LandOfFree
Ducting Characteristics of Pc 1-2 Waves at High Latitudes on the Ground and in Space 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 Ducting Characteristics of Pc 1-2 Waves at High Latitudes on the Ground and in Space, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ducting Characteristics of Pc 1-2 Waves at High Latitudes on the Ground and in Space will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1400828