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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Climatology of gravity waves—induced electric fieldsin the equatorial Eregion
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Climatology of gravity waves—induced electric fieldsin the equatorial Eregion

机译：气候学重力waves-induced电气fieldsin赤道异族人

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摘要

Equatorial electrojet (EEJ) observations using VHF radars show backscattered echoesfrom two types of electron density irregularities explained by the modified two-stream(Type I) and the gradient drift (Type II) instabilities. From the Type II irregularityvelocities obtained by a radar installed at Sao Luiz Space Observatory (2.58°S, 44.23°W,magnetic latitude 0.23°S) we have inferred the vertical electric fields (Er). The Ezinference was based on geomagnetic field and atmospheric models. A harmonic analysisof these electric fields shows the presence of gravity waves (GW) induced oscillationsin the EEJ. We calculated the ratio between GW-related electric fields and the total Ez, which is an indicator of the efficiency in the production of an additional electric fielddue to a gravity wave neutral wind. In the present paper we describe the methodologyof analysis and discuss some characteristics of the gravity waves that could modify theequatorial ionospheric electric fields.
机译：使用甚高频赤道电喷流(EEJ)观察雷达显示背散射echoesfrom两种电子密度违规行为的解释修改二束(I型)和梯度漂移不稳定性(II型)。irregularityvelocities雷达获得的安装在巴西路易斯空间天文台(2.58°,44.23°W,磁纬度0.23°S)推断出垂直的电场(Er)。Ezinference是基于地磁场大气模型。电场引力的存在波(GW)诱导oscillationsin EEJ。计算GW-related电动之间的比率字段和总易之,这是一个指标额外的生产效率电动fielddue重力波中性风。本文描述了methodologyof分析和讨论一些重力波能的特性修改theequatorial电离层电场。

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