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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Double crests of peak height in the equatorial ionospheric F_2 layer observed by COSMIC
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Double crests of peak height in the equatorial ionospheric F_2 layer observed by COSMIC

机译：双波峰赤道的峰高电离层₂层观察到宇宙

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摘要

For the first time, we report daytime double crests of peak height (h_mF_2) in the F_2 layer based on the Constellation Observing System for Meteorology Ionosphere and Climate (COSMIC) observations during 2007–2014. Evident double crests of h_mF_2 occurred at around ±10° geomagnetic latitude with a trough over the magnetic equator at low solar activity and at March equinox. This phenomenon is referred to as an equatorial height anomaly (EHA) of the ionospheric F_2 layer. The double crests became less obvious at September equinox and disappeared at solstices. At solstices only one crest was observed in the summer hemisphere, which is probably associated with transequatorial neutral winds. In addition, the double EHA crests generally take place during 10:00–14:00 local times. Our results indicate that the EHA favors the conditions of strong vertical plasma drifts and weak transequatorial neutral winds during low solar activity. The EHA feature is reproduced by the Thermosphere Ionosphere Electrodynamics Global Circulation Model at March equinox and low solar activity.
机译：第一次,我们报告白天翻倍波峰的峰高(h_mF_2)₂层基于星座观测系统气象学电离层和气候(宇宙)观察期间2007 - 2014。波峰h_mF_2发生在±10°地磁纬度与低谷以低太阳活动和磁赤道三月春分。一个赤道异常(EHA)的高度电离层₂层。不太明显的在9月equinox和消失了在二至点。观察到在夏天半球,可能与transequatorial中立大风。通常发生在10:00-14:00当地次了。强大的垂直等离子体漂移的条件在低和弱transequatorial中性风太阳活动。热大气层电离层电动力学全球环流模型在3月equinox和低太阳活动。

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