The Generation and Propagation of Pc 3--4 ULF Waves at High Latitudes

Details The Generation and Propagation of Pc 3--4 ULF Waves at High Latitudes The Generation and Propagation of Pc 3--4 ULF Waves at High Latitudes

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm11c0452h&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SM11C-0452

Physics

2724 Magnetopause, Cusp, And Boundary Layers, 2740 Magnetospheric Configuration And Dynamics, 2744 Magnetotail, 2752 Mhd Waves And Instabilities, 2768 Plasmasphere

Scientific paper

We present the results from a study of 170 Pc 3--4 ULF waves observed with the IMAGE magnetometer array in northern Scandinavia (L>= 3.3) from January and March, 1998. Amplitude, cross-phase and coherence profiles with latitude and longitude have been used to produce the ground velocity, m-number and coherence length of these waves. Polarization properties are also shown with profiles of the Stokes parameters with latitude and longitude. Interplanetary magnetic field and cone angle measurements from the WIND satellite have been compared with the ULF wave frequency to ascertain the relationship predicted by the upstream ion-cyclotron resonance mechanism. Ground profiles of amplitude with latitude show a high-latitude peak at around 75o CGM, the location of which has been compared with that of the cusp, measured by DMSP satellites and estimated from three empirical models. The possible influence of the plasmapause on ground ULF wave signals has also been investigated, by comparing the latitude profiles with the location of the plasmapause predicted by a further three empirical models. Data from the magnetometer at Davis in Antarctica have been compared with those from Longyearbyen in Svalbard, in an attempt to determine any conjugate point properties of these waves. Finally, the azimuthal spatial separation of the waves has been investigated using data from the MACCS magnetometer array in Arctic Canada (L>= 11.9). We compare these results with those proposed by various generation and propagation mechanisms, such as the Kelvin-Helmholtz instability, upstream ion-cyclotron resonance, field line resonance harmonics, direct fast mode propagation, waveguide/cavity modes and electron precipitation.

Affiliated with

Also associated with

No associations

Rating

The Generation and Propagation of Pc 3--4 ULF Waves at High Latitudes 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 The Generation and Propagation of Pc 3--4 ULF Waves at High Latitudes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Generation and Propagation of Pc 3--4 ULF Waves at High Latitudes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1438187