Electron temperature enhancements in nighttime equatorial ionosphere under the occurrence of plasma bubbles

F. C. De Meneses, M. V. Klimenko, V. V. Klimenko, E. Alam Kherani, P. Muralikrishna, Jiyao Xu, Alina Marie Hasbi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Simultaneous in-situ measurements of electron density and temperature in the nighttime equatorial region were performed by a rocket experiment launched under solar minimum and geomagnetic quiet conditions from the station of Alcântara (2.24°S; 44.24°W), Brazil, on Dec. 18, 1995, 21:17 LT. These measurements detected during the upleg flight a large overheated area around the base of density profile. The presence of plasma bubbles was revealed during the downleg phase, as well as temperature enhancements detected preferentially at altitudes where plasma depletions are found. It was assumed that the region traversed by the rocket during the downleg was preceded before the bubble's onset by a large overheating as observed during the upleg flight. Analyzing this framework under the light of the Global Self-Consistent Model of the Thermosphere, Ionosphere and Protonosphere (GSM TIP), as well as a 2D numerical code that simulate the growth of an instability and the evolution of thermal energy inside a bubble, we found that despite an overheated area in the F-region bottomside can disturb the electron density profile around the altitude interval where such heat is deposited, it seems not have a direct influence over parameters responsible for the bubble onset. Additionally, the phenomenon of the intra-bubble thermal enhancement could be formed due to the convection of hot-electron fluid transported from the overheated region surrounding the base of the F-region to upper altitudes by the underlying mechanism of bubble generation.

Original languageEnglish
Pages (from-to)36-47
Number of pages12
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Volume103
DOIs
Publication statusPublished - Oct 2013

Fingerprint

plasma bubbles
ionospheres
bubble
ionosphere
bubbles
occurrences
electron energy
plasma
electron
augmentation
F region
rockets
temperature
electron density
flight
equatorial regions
electron density profiles
thermosphere
Brazil
in situ measurement

Keywords

  • Electron temperature
  • Equatorial ionosphere
  • Plasma bubbles
  • Rocket measurements

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science
  • Atmospheric Science

Cite this

De Meneses, F. C., Klimenko, M. V., Klimenko, V. V., Alam Kherani, E., Muralikrishna, P., Xu, J., & Hasbi, A. M. (2013). Electron temperature enhancements in nighttime equatorial ionosphere under the occurrence of plasma bubbles. Journal of Atmospheric and Solar-Terrestrial Physics, 103, 36-47. https://doi.org/10.1016/j.jastp.2013.04.003

Electron temperature enhancements in nighttime equatorial ionosphere under the occurrence of plasma bubbles. / De Meneses, F. C.; Klimenko, M. V.; Klimenko, V. V.; Alam Kherani, E.; Muralikrishna, P.; Xu, Jiyao; Hasbi, Alina Marie.

In: Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 103, 10.2013, p. 36-47.

Research output: Contribution to journalArticle

De Meneses, F. C. ; Klimenko, M. V. ; Klimenko, V. V. ; Alam Kherani, E. ; Muralikrishna, P. ; Xu, Jiyao ; Hasbi, Alina Marie. / Electron temperature enhancements in nighttime equatorial ionosphere under the occurrence of plasma bubbles. In: Journal of Atmospheric and Solar-Terrestrial Physics. 2013 ; Vol. 103. pp. 36-47.
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