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首页> 外文期刊>Geophysical Research Letters >Positive and negative ionospheric disturbances at middle latitudes during geomagnetic storms
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Positive and negative ionospheric disturbances at middle latitudes during geomagnetic storms

机译：地磁暴期间中纬度的电离层正负扰动

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The morphology of middle latitude ionospheric disturbances in response to geomagnetic storms has been investigated to determine the phenomenological differences between positive and negative ionospheric storm effects, using foF2 observations from azimuthal chain of stations. To better organize the disturbance signatures, two ionospheric indices were introduced to describe the maximum positive (Dfu-index) and negative (Dfl-index) deviation observed during an ionospheric storm. A systematic appearance of nighttime positive effects was determined with a 24-hour recurrence. The thermospheric-ionospheric view associated with positive and negative storm effects proposed by Prolss (1993) was extended to encompass our observations. This test clearly demonstrates that such a model can capture most of the basic aspects of ionospheric storms, nevertheless the prominent feature of large nighttime enhancements in the ionization density have yet to be explained. [References: 18]
机译：已经对中纬度电离层扰动响应地磁风暴的形态进行了研究，以确定了正向电离层风暴效应与负向电离层风暴效应之间的现象学差异，这是使用来自台站方位链的foF2观测值确定的。为了更好地组织扰动特征，引入了两个电离层指数来描述电离层风暴期间观测到的最大正（Dfu-指数）和负（Dfl-指数）偏差。 24小时复发后，系统地显示出夜间的积极效果。 Prolss（1993）提出的与正，负风暴效应相关的热层-电离层视图已扩展到涵盖我们的观测。该测试清楚地表明，这种模型可以捕获电离层风暴的大多数基本方面，但是夜间电离密度的大幅提高的显着特征还有待说明。 [参考：18]

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