Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1462r&link_type=abstract
Journal of Geophysical Research, Volume 108, Issue A12, pp. SMP 22-1, CiteID 1462, DOI 10.1029/2003JA009906
Physics
12
Magnetospheric Physics: Energetic Particles, Precipitating, Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Magnetosphere/Ionosphere Interactions, Ionosphere: Wave/Particle Interactions, Meteorology And Atmospheric Dynamics: Atmospheric Electricity
Scientific paper
The behavior of high-energy electrons trapped in the Earth's Van Allen radiation belts has been extensively studied, through both experimental and theoretical techniques. While the evidence for whistler induced electron precipitation (WEP) from the radiation belts is overwhelming, and the mechanisms behind WEP are well understood, the overall significance of WEP on radiation belt loss rates has not been clear. In this paper we investigate the L-shell variation and significance of WEP-driven loss of Van Allen belt electrons by combining in situ measurements of electron precipitation, local WEP rates determined from Trimpi perturbations, and global lightning distributions. Our modeling suggests that long-term WEP driven losses are more significant than all other inner radiation belt loss processes for electron kinetic energies in the range ~50-150 keV in the L-shell range L = 2-2.4. These calculated lifetimes are comparable to the observed decay rates of artificially injected high-energy electrons. The upper energy limit of the WEP significance range increases with decreasing L to ~225 keV at L = 2. For electron energies above this range manmade VLF transmitters and plasmaspheric hiss should dominate over all other loss processes. However, as our lifetimes are based on rather conservative parameter estimates, these conclusions should represent the lower bounds for the energy ranges over which WEP losses are significant. For lower L-shells the coupling of lightning activity to the production of WEP events rapidly decreases, such that by L ~ 1.7 WEP will be unimportant in the overall loss processes.
Clilverd Mark A.
McCormick Robert J.
Rodger Craig J.
No associations
LandOfFree
Significance of lightning-generated whistlers to inner radiation belt electron lifetimes 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 Significance of lightning-generated whistlers to inner radiation belt electron lifetimes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Significance of lightning-generated whistlers to inner radiation belt electron lifetimes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-882660