Disruption of E region echoes observed by the EAR during the development phase of equatorial spread F: A manifestation of electrostatic field coupling
Disruption of E region echoes observed by the EAR during the development phase of equatorial spread F: A manifestation of electrostatic field coupling
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DOI：
10.1029/2005gl022868
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发表时间：
2005-09
影响因子：
5.2
通讯作者：
A. Patra;T. Yokoyama;M. Yamamoto;S. Saito;T. Maruyama;S. Fukao
中科院分区：
文献类型：
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作者：
A. Patra;T. Yokoyama;M. Yamamoto;S. Saito;T. Maruyama;S. Fukao
利用赤道大气雷达(EAR)同时观测了E区和F区的不规则性，研究了E区和F区之间的耦合。这些观测结果清楚地表明，耳部E区场向不规则性(FAI)的破坏与赤道等离子体气泡的发展阶段密切相关。在赤道气泡发展阶段观测到的低纬E区FAI的耦合效应非常明显。这与耳朵上的E区与赤道上的F区相连接的事实是一致的，在那里产生了与赤道等离子体气泡现象相关的强极化电场。与赤道夜间电离层等离子体密度耗尽相关的相对较弱的垂直向下电场和较大的向东极化电场，映射到耳部低纬E区，被认为是抑制不规则增长的原因。
Simultaneous observations of E‐ and F‐ region irregularities made using the Equatorial Atmosphere Radar (EAR) are presented to study the coupling between the E‐ and F‐ region. The observations clearly suggest that the disruption of E region field aligned irregularities (FAI) over the EAR is closely associated with the development phase of equatorial plasma bubble. The observed coupling effects on the low latitude E region FAI during the development phase of equatorial bubble are found to be quite pronounced over the EAR. This is consistent with the fact that the E region over the EAR connects the F region over the equator, where strong polarization electric fields are generated in association with equatorial plasma bubble phenomenon. Relatively weak vertical downward electric field and large eastward polarization electric field associated with plasma density depletion in the evening equatorial ionosphere, which map to low latitude E region over the EAR, are proposed to be responsible for the inhibition of growth of irregularities.