Ionospheric plasma caves under the equatorial ionization anomaly

I. T. Lee, J. Y. Liu, C. H. Lin, K. I. Oyama, C. Y. Chen, C. H. Chen

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This paper reports the existence of plasma caves, minima in the electron density located at 5-10 to the magnetic equator, in the bottomside ionosphere based on electron densities simulations from the International Reference Ionosphere (IRI-2007) and clear evidences given by plasma density and drift measurements of the Dynamic Explorer 2 (DE 2) satellite during 1981-1983. The IRI simulations suggest plasma caves as daytime features (08:00-19:00 LT; length of 18,158 km in the longitudinal direction), that range from the E region up to about 300 km altitude with 10 (or 1100 km) width in the latitudinal direction. In situ measurements of the ion and electron densities probed by the DE 2 confirm the existence of the plasma caves at low altitudes of the EIA ionosphere. The unexpected downward and upward (or weakly and strongly upward) ion drifts at the magnetic equator and the two off equators seem to play an important role responsible for the plasma cave formation.

Original languageEnglish
Article numberA11309
JournalJournal of Geophysical Research: Space Physics
Volume117
Issue number11
DOIs
Publication statusPublished - 2012 Dec 3

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caves
Caves
ionospherics
Ionization
cave
Ionosphere
ionization
anomalies
ionospheres
Carrier concentration
Plasmas
anomaly
plasma
magnetic equator
electron density
ionosphere
Dynamics Explorer 2 satellite
Plasma simulation
E region
Ions

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

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title = "Ionospheric plasma caves under the equatorial ionization anomaly",
abstract = "This paper reports the existence of plasma caves, minima in the electron density located at 5-10 to the magnetic equator, in the bottomside ionosphere based on electron densities simulations from the International Reference Ionosphere (IRI-2007) and clear evidences given by plasma density and drift measurements of the Dynamic Explorer 2 (DE 2) satellite during 1981-1983. The IRI simulations suggest plasma caves as daytime features (08:00-19:00 LT; length of 18,158 km in the longitudinal direction), that range from the E region up to about 300 km altitude with 10 (or 1100 km) width in the latitudinal direction. In situ measurements of the ion and electron densities probed by the DE 2 confirm the existence of the plasma caves at low altitudes of the EIA ionosphere. The unexpected downward and upward (or weakly and strongly upward) ion drifts at the magnetic equator and the two off equators seem to play an important role responsible for the plasma cave formation.",
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Ionospheric plasma caves under the equatorial ionization anomaly. / Lee, I. T.; Liu, J. Y.; Lin, C. H.; Oyama, K. I.; Chen, C. Y.; Chen, C. H.

In: Journal of Geophysical Research: Space Physics, Vol. 117, No. 11, A11309, 03.12.2012.

Research output: Contribution to journalArticle

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AU - Lee, I. T.

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AU - Lin, C. H.

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AU - Chen, C. H.

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