Journal article
The role of ring current particle injections: Global simulations and Van Allen Probes observations during 17 March 2013 storm
Geophysical research letters, Vol.41(4), pp.1126-1132
02/28/2014
DOI: 10.1002/2014GL059322
Abstract
We simulate substorm injections observed by the Van Allen Probes during the 17 March 2013 storm using a self‐consistent coupling between the ring current model RAM‐SCB and the global MHD model BATS‐R‐US. This is a significant advancement compared to previous studies that used artificially imposed electromagnetic field pulses to mimic substorm dipolarization and associated inductive electric field. Several substorm dipolarizations and injections are reproduced in the MHD model, in agreement with the timing of shape changes in the AE/AL index. The associated inductive electric field transports plasma sheet plasma to geostationary altitudes, providing the boundary plasma source to the ring current model. It is found that impulsive plasma sheet injections, together with a large‐scale convection electric field, are necessary to develop a strong ring current. Comparisons with Van Allen Probes observations show that our model reasonably well captures dispersed electron injections and the global Dst index.
Key Points
New capability for studying substorm‐associated depolarization and injectionsAdvanced from previous technique that used artificial electromagnetic pulsesThe model well produces injections and electron fluxes observed from Van Allen Probes
Details
- Title: Subtitle
- The role of ring current particle injections: Global simulations and Van Allen Probes observations during 17 March 2013 storm
- Creators
- Yiqun Yu - Los Alamos National LaboratoryVania Jordanova - Los Alamos National LaboratoryDan Welling - University of MichiganBrian Larsen - Los Alamos National LaboratorySeth G Claudepierre - The Aerospace CorporationCraig Kletzing - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.41(4), pp.1126-1132
- DOI
- 10.1002/2014GL059322
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Number of pages
- 7
- Language
- English
- Date published
- 02/28/2014
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199926102771
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