The variability of the occurrence of the Field Aligned Irregularities in the middle-latitude F region using the VHF radar observation at Daejon, South Korea.
Abstract
The VHF radar observations at Daejeon in South Korea reveal the highly variable nature of the field-aligned irregularities (FAIs) in the middle-latitude F-region. Medium-scale travelling ionospheric disturbances (MSTIDs) are suggested as the source of FAIs, however, the occurrence climatology of the FAIs cannot be fully explained by the existence of the MSTIDs. Moreover, the occurrence climatology of the FAIs with respect to local time (pre-midnight and post-midnight) likely to have separate onset mechanisms. We investigate the role of the ionospheric disturbances(MSTIDs, Equatorial Plasma Bubbles(EPBs)) in the creation of the FAIs using the radar data at Daejon , the total electron content maps over Japan acquired during 2010-2015. and the measurements of the ion density by Swarm (2014,2015). We assess the causal linkage of the occurrence of the FAIs by examining the correlative occurrence of MSTIDs in middle latitude F-region and EPB in low latitude F-region.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2016
- Bibcode:
- 2016AGUFMSA13B..07O
- Keywords:
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- 2499 General or miscellaneous;
- IONOSPHEREDE: 7999 General or miscellaneous;
- SPACE WEATHER