Motions of the equatorial ionization anomaly crests imaged by FORMOSAT-3/COSMIC

C. H. Lin; J. Y. Liu; T. W. Fang; P. Y. Chang; H. F. Tsai; C. H. Chen; C. C. Hsiao

doi:10.1029/2007GL030741

Motions of the equatorial ionization anomaly crests imaged by FORMOSAT-3/COSMIC

C. H. Lin, J. Y. Liu, T. W. Fang, P. Y. Chang, H. F. Tsai, C. H. Chen, C. C. Hsiao

Department of Earth Sciences

Research output: Contribution to journal › Article › peer-review

155 Citations (Scopus)

Abstract

The equatorial ionization anomaly (EIA) structures and evolutions are imaged using radio occultation observation of the newly launched FORMOSAT-3/COSMIC (F3/C) satellite constellation. Three-dimensional ionospheric images provide unprecedented detail of the EIA structure globally. This paper presents images of the EIA structures during July-August 2006 and discusses the development and subsidence of the EIA. Clear seasonal asymmetries in both ionospheric electron density and layer height are observed. Two-dimensional (cross section) maps at a meridian provide dynamic variations and motions of the northern and southern EIA crests. Results suggest that in addition to the asymmetric neutral composition effect, interactions between the summer-to-winter (transequatorial) neutral winds and strength of the equatorial plasma fountain effect play important roles in producing asymmetric development of the EIA crests as imaged by the F3/C.

Original language	English
Article number	L19101
Journal	Geophysical Research Letters
Volume	34
Issue number	19
DOIs	https://doi.org/10.1029/2007GL030741
Publication status	Published - 2007 Oct 16

All Science Journal Classification (ASJC) codes

Geophysics
Earth and Planetary Sciences(all)

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10.1029/2007GL030741

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title = "Motions of the equatorial ionization anomaly crests imaged by FORMOSAT-3/COSMIC",

abstract = "The equatorial ionization anomaly (EIA) structures and evolutions are imaged using radio occultation observation of the newly launched FORMOSAT-3/COSMIC (F3/C) satellite constellation. Three-dimensional ionospheric images provide unprecedented detail of the EIA structure globally. This paper presents images of the EIA structures during July-August 2006 and discusses the development and subsidence of the EIA. Clear seasonal asymmetries in both ionospheric electron density and layer height are observed. Two-dimensional (cross section) maps at a meridian provide dynamic variations and motions of the northern and southern EIA crests. Results suggest that in addition to the asymmetric neutral composition effect, interactions between the summer-to-winter (transequatorial) neutral winds and strength of the equatorial plasma fountain effect play important roles in producing asymmetric development of the EIA crests as imaged by the F3/C.",

author = "Lin, {C. H.} and Liu, {J. Y.} and Fang, {T. W.} and Chang, {P. Y.} and Tsai, {H. F.} and Chen, {C. H.} and Hsiao, {C. C.}",

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AU - Lin, C. H.

AU - Liu, J. Y.

AU - Fang, T. W.

AU - Chang, P. Y.

AU - Tsai, H. F.

AU - Chen, C. H.

AU - Hsiao, C. C.

PY - 2007/10/16

Y1 - 2007/10/16

N2 - The equatorial ionization anomaly (EIA) structures and evolutions are imaged using radio occultation observation of the newly launched FORMOSAT-3/COSMIC (F3/C) satellite constellation. Three-dimensional ionospheric images provide unprecedented detail of the EIA structure globally. This paper presents images of the EIA structures during July-August 2006 and discusses the development and subsidence of the EIA. Clear seasonal asymmetries in both ionospheric electron density and layer height are observed. Two-dimensional (cross section) maps at a meridian provide dynamic variations and motions of the northern and southern EIA crests. Results suggest that in addition to the asymmetric neutral composition effect, interactions between the summer-to-winter (transequatorial) neutral winds and strength of the equatorial plasma fountain effect play important roles in producing asymmetric development of the EIA crests as imaged by the F3/C.

AB - The equatorial ionization anomaly (EIA) structures and evolutions are imaged using radio occultation observation of the newly launched FORMOSAT-3/COSMIC (F3/C) satellite constellation. Three-dimensional ionospheric images provide unprecedented detail of the EIA structure globally. This paper presents images of the EIA structures during July-August 2006 and discusses the development and subsidence of the EIA. Clear seasonal asymmetries in both ionospheric electron density and layer height are observed. Two-dimensional (cross section) maps at a meridian provide dynamic variations and motions of the northern and southern EIA crests. Results suggest that in addition to the asymmetric neutral composition effect, interactions between the summer-to-winter (transequatorial) neutral winds and strength of the equatorial plasma fountain effect play important roles in producing asymmetric development of the EIA crests as imaged by the F3/C.

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Motions of the equatorial ionization anomaly crests imaged by FORMOSAT-3/COSMIC

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