|
Detailed Reference Information |
Voronkov, I.O. (2005). Near-Earth breakup triggered by the earthward traveling burst flow. Geophysical Research Letters 32: doi: 10.1029/2005GL022983. issn: 0094-8276. |
|
Computer modeling is performed in order to explore a hypothesis stating that the near-Earth breakup can be triggered by a pulse of convection traveling earthward from the more distant magnetotail. The following possible scenario for the interaction of the burst with the near-Earth edge of the plasma sheet (PS) is revealed. The near-dipolar magnetic field topology of the inner PS leads to the flow breaking which in turn launches a wide spectrum of dispersive compressional waves propagating further Earthward. Strong topological variations of the magnetic field at the inner edge of the PS, required by the equilibrium conditions, play a role of the resonant cavity for selected compressional modes. Growing resonance modes provide a ponderomotive force pumping up corresponding nonlinear ballooning eigenmodes. The latter extract energy stored in the inner PS and produce vortical structures expanding tailward. |
|
|
|
BACKGROUND DATA FILES |
|
|
Abstract |
|
|
|
|
|
Keywords
Magnetospheric Physics, MHD waves and instabilities (2149, 6050, 7836), Magnetospheric Physics, Numerical modeling, Magnetospheric Physics, Plasma sheet, Magnetospheric Physics, Substorms |
|
Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
|
|
|