Plasma blob events observed by KOMPSAT-1 and DMSP F15 in the low latitude nighttime upper ionosphere

Details Plasma blob events observed by KOMPSAT-1 and DMSP F15 in the low latitude nighttime upper ionosphere Plasma blob events observed by KOMPSAT-1 and DMSP F15 in the low latitude nighttime upper ionosphere

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30ussc9p&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 21, pp. SSC 9-1, CiteID 2114, DOI 10.1029/2003GL018249

Physics

10

Ionosphere: Equatorial Ionosphere, Ionosphere: Ion Chemistry And Composition (0335), Ionosphere: Ionospheric Irregularities, Ionosphere: Topside Ionosphere, Ionosphere: Plasma Temperature And Density

Scientific paper

In this paper we report plasma blob events (plasma density enhancements) that were observed from KOMPSAT-1 (685-km altitude, 2250 LT) and from DMSP F15 (840-km altitude, 2130 LT) in the low-latitude F region. The blobs were observed mostly along the +/-15° magnetic latitudes. Their global distribution showed a seasonal-longitudinal dependence similar to the distribution of the equatorial plasma bubbles. The blobs drifted upward relative to the ambient plasma, and the electron temperatures and H+ proportions were lower within the blobs compared to those in the background. The characteristics of the plasma blobs were similar to those of the equatorial plasma bubbles. Therefore, it is suggested that the blobs originated from the lower altitudes by a mechanism that drives an upward drift of the plasma bubbles. The blob events did not occur in a correlated way with the magnetic activity or daily variation of solar activity.

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