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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >F Region Electric Field Effects on the Intermediate Layer Dynamics During the Evening Prereversal Enhancement at Equatorial Region Over Brazil
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F Region Electric Field Effects on the Intermediate Layer Dynamics During the Evening Prereversal Enhancement at Equatorial Region Over Brazil

机译：F区电场的影响中间层动力学在晚上Prereversal增强在赤道地区巴西

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摘要

Using ionograms from the Brazilian equatorial site of S?o Luís (SL, 2° S; 44° W, I = -3.8°), the relationship between the uplift of the intermediate layers (ILs) at sunset and the prereversal enhancement of the zonal electric field (PRE) is investigated. The ILs were studied during the solar maximum (2003) and minimum activity (2009) periods. The presence of the ILs during the PRE occurrence time was very low during both years. In 2003, six ILs' events were observed, being four of them in the summer solstice and one in the March equinox. In 2009, only a single event was registered and occurred during the December month. The results show that depending on the height at which the ILs are located, their upward movement at sunset can be in some way related to the normal F layer rise at sunset due to the PRE. The initial altitude at which such ascending ILs were observed was higher than their normal height near sunset. Additionally, the eastward prompt penetration electric fields (PPEFs) during weak magnetic storms can also contribute to the IL's rise. An interesting case of uplift of a sporadic-E layer from ~120 to 290 km probably due to the PPEF is also investigated.
机译：从巴西赤道站点使用电离图的提升之间的关系中间的层(ILs)在日落prereversal带状电动的增强字段(前)。在太阳能最大(2003)和最小活动(2009年)时期。在以前发生时间很低在这两年期间。观察,在夏天是四个夏至,另一个在三月春分。只有一个事件注册和发生在去年12月。根据高度的图书馆日落时,他们向上运动在某种程度上与正常F层上升有关由于PRE日落。这类提升图书馆被观察到的高比正常身高接近日落。此外,向东迅速渗透在弱磁场电场(PPEFs)风暴还可以促进IL的崛起。有趣的案例的隆起分散e层从120 ~ 290公里可能由于PPEF也调查。

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