Comprehensive analysis of the flux dropout during 7-8 November 2008 storm using multisatellite observations and RBE model

Cited 5 time in webofscience Cited 4 time in scopus
  • Hit : 203
  • Download : 0
We investigate an electron flux dropout during a weak storm on 7-8 November 2008, with Dst minimum value being - 37 nT. During this period, two clear dropouts were observed on GOES 11>2MeV electrons. We also find a simultaneous dropout in the subrelativistic electrons recorded by Time History of Events and Macroscale Interactions during Substorms probes in the outer radiation belt. Using the Radiation Belt Environment model, we try to reproduce the observed dropout features in both relativistic and subrelativistic electrons. We found that there are local time dependences in the dropout for both observation and simulation in subrelativistic electrons: ( 1) particle loss begins from nightside and propagates into dayside and (2) resupply starts from near dawn magnetic local time and propagates into the dayside following electron drift direction. That resupply of the particles might be caused by substorm injections due to enhanced convection. We found a significant precipitation in hundreds keV electrons during the dropout. We observe electromagnetic ion cyclotron and chorus waves both on the ground and in space. We find the drift shells are opened near the beginning of the first dropout. The dropout in MeV electrons at GEO might therefore be initiated due to the magnetopause shadowing, and the followed dropout in hundreds keV electrons might be the result of the combination of magnetopause shadowing and precipitation loss into the Earth's atmosphere.
Publisher
AMER GEOPHYSICAL UNION
Issue Date
2015-06
Language
English
Article Type
Article
Keywords

OUTER RADIATION BELT; PITCH-ANGLE SCATTERING; ION-CYCLOTRON WAVES; ELECTRON ACCELERATION; INNER MAGNETOSPHERE; MAGNETIC STORMS; CHORUS WAVES; 30 SEPTEMBER; PHASE-SPACE; DIFFUSION

Citation

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, v.120, no.6, pp.4298 - 4312

ISSN
2169-9380
DOI
10.1002/2015JA021085
URI
http://hdl.handle.net/10203/200719
Appears in Collection
RIMS Journal Papers
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 5 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0