|
Detailed Reference Information |
Burke, W.J., Aggson, T.L., Maynard, N.C., Hoegy, W.R., Hoffman, R.A., Candy, R.M., Liebrecht, C. and Rodgers, E. (1992). Effects of a lightning discharge detected by the DE 2 satellite over Hurricane Debbie. Journal of Geophysical Research 97: doi: 10.1029/92JA00305. issn: 0148-0227. |
|
We report the satellite observation of a large, ~40 mV m-1, transient electric field disturbance over Hurricane Debbie in September 1982. The event lasted less than a second and correlated closely with a burst of highly field-aligned, upward moving electrons with nearly 1 keV of energy. The electric field event is viewed as a spheric disturbance from a lightning discharge in the active weather system located beneath the satellite. A spheric interpretation of the observed electric field transient is consistent with a subsequent observation of energetic electrons precipitating from the radiation belts. Measured quasi-dc electric fields and cold plasma density variations are only roughly consistent with model predictions for ULF wave propagation from a storm system to the ionosphere. To understand this first observation of upward moving electrons in the ionosphere associated with a lightning event, we compare the several mechanisms for electron acceleration by electric fields with components (E∥) along the magnetic field. In our scenario, ''runaway'' electrons were accelerated in ~1 ms by a downward directed E∥ pulse of ~1 V m-1 magnitude. Such fields can result from rapidly exposed, negative space charges near the tops of clouds during positive cloud-to-ground discharges. High-frequency Fourier components of the E∥ pulse must propagate through the low-conducting nighttime atmosphere to the ionosphere with little dissipation. ¿ American Geophysical Union 1992 |
|
|
|
BACKGROUND DATA FILES |
|
|
Abstract |
|
|
|
|
|
Keywords
Ionosphere, Ionosphere-atmosphere interactions, Ionosphere, Particle acceleration, Ionosphere, Particle precipitation, Ionosphere, Electric fields and currents |
|
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 |
|
|
|