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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >The long-duration positive storm effects in the equatorial ionosphere over Jicamarca
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The long-duration positive storm effects in the equatorial ionosphere over Jicamarca

机译：长期积极的风暴影响赤道电离层对Jicamarca

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摘要

The long-duration positive storm (LPS) in the equatorial regions is relatively poorly understood. In this report, we conducted a statistical analysis of the LPS effects in the equatorial ionosphere over Jicamarca (12.0°S, 283.2°E) in 1998–2010. There are 250 geomagnetic storms (minimum Dst<-50 nT) in 1998–2010, but the ionosonde observations at Jicamarca are available only for 204 storms. A total of 46 LPSs are identified in terms of the criterion that the storm time relative deviation of peak density of F_2 layer (N_mF_2) exceeds 25% for more than 6 h. A salient feature is that the occurrence of LPSs tends to decay approximately exponentially on the following days after the main phase of geomagnetic storms. The ratios of the number of equatorial LPSs to that of geomagnetic storms have no obvious dependence on season and solar activity. During the daytime LPSs, the disturbed zonal electric field is mostly westward, as indicated from the geomagnetic field changes in the equatorial American region. For the nighttime LPSs, the significant uplifting of F_2 layer caused by an eastward electric field is the most important feature. Therefore, the disturbed electric field should play an essential role in forming the equatorial LPSs.
机译：长期积极的风暴(有限合伙人)赤道地区相对较差理解。统计分析的有限合伙人的影响赤道电离层对Jicamarca(12.0°,283.2°E) 1998 - 2010。风暴(最低Dst < -50 nT)在1998 - 2010,但是ionosonde观察Jicamarca是可用的只有204年的风暴。确定的标准风暴时间峰值密度的相对偏差₂层(N_mF_2)超过25%超过6小时。一个显著特征是,有限合伙人的发生倾向于大约衰减指数上后几天后的主要阶段地磁风暴。赤道有限合伙人的地磁风暴没有明显的依赖和太阳能季节活动。纬向电场主要是向西,从地磁场变化表示美国赤道地区。有限合伙人,₂层的显著提升向东造成的电场是最重要的特性。电场应该发挥重要作用形成了赤道有限合伙人。

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