Physics
Scientific paper
Mar 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11603218e&link_type=abstract
Journal of Geophysical Research, Volume 116, Issue A3, CiteID A03218
Physics
Magnetospheric Physics: Ring Current, Magnetospheric Physics: Magnetic Storms And Substorms (4305, 7954), Magnetospheric Physics: Magnetosphere: Inner, Magnetospheric Physics: Energetic Particles: Precipitating, Ionosphere: Particle Precipitation
Scientific paper
The storm time ring current sometimes exhibits rapid decay, as suggested from the Dst index, but the underlying mechanism is unknown. By means of a simulation with pitch angle scattering due to the field line curvature (FLC), together with the charge exchange and adiabatic loss cone loss, we investigated rapid decay of the storm time ring current for the large magnetic storm that occurred on 12 August 2000. When all three loss processes were included, the Dst (SYM-H) index showed rapid recovery with an e-folding time of ˜6 h. However, without FLC scattering, the simulated Dst (SYM-H) index showed a slower recovery with an e-folding time of ˜12 h. Overall flux of energetic neutral hydrogen with energy ≥ 39 keV was significantly reduced by the FLC scattering and is consistent with data from the high energy neutral analyzer (HENA) on board the IMAGE satellite. Power of precipitating protons showed a fairly good agreement with data from the far ultraviolet (FUV) imager on board IMAGE. These fairly good agreements with observations lead to the possible conclusion that the FLC scattering is a significant loss mechanism for the ring current ions, and the main oval of the proton aurora is likely a manifestation of the precipitating loss of the protons for this particular storm.
C:son Brandt Pontus
Ebihara Yasuhiro
Fok Mei Ching
Immel Thomas J.
No associations
LandOfFree
Rapid decay of storm time ring current due to pitch angle scattering in curved field line 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 Rapid decay of storm time ring current due to pitch angle scattering in curved field line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rapid decay of storm time ring current due to pitch angle scattering in curved field line will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-865207