Global Distribution of the Equatorial Plasma Bubbles in the Premidnight Sector During Solar Maximum as Observed by KOMPSAT-1

Details Global Distribution of the Equatorial Plasma Bubbles in the Premidnight Sector During Solar Maximum as Observed by KOMPSAT-1 Global Distribution of the Equatorial Plasma Bubbles in the Premidnight Sector During Solar Maximum as Observed by KOMPSAT-1

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa33a1129p&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SA33A-1129

Other

2400 Ionosphere, 2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities, 2447 Modeling And Forecasting, 2481 Topside Ionosphere

Scientific paper

We investigated the global distribution of the equatorial plasma bubbles (EPBs) using the in-situ ion density measurements from Korea Multi-Purpose Satellite-1 (KOMPSAT-1) at the altitude of 680 km at 2230 LT during the solar maximum period from June 2000 to August 2001. EPBs were observed at all longitudes around the magnetic dip equator in the equinoctial seasons with the peak occurrence in the American-Atlantic-African regions. During the northern summer the EPBs occurred predominantly in the magnetic north in the Indian and west Pacific regions, whereas they are totally suppressed in the American-Atlantic sectors. During the northern winter the EPBs are highly promoted in the America-Atlantic sectors but are suppressed in other longitude sectors, especially, in the Pacific sector. We investigated the growth conditions of the Rayleigh-Taylor instability by using the model atmosphere (MSIS) and ionosphere (IRI). The simulation results show that the global EPB distribution can be explained by using the upward plasma drift velocity at post-sunset time weighted by the flux-tube integrated electron content in the lower F region.

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