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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Global Ionospheric and Thermospheric Effects of the June 2015 Geomagnetic Disturbances: Multi-Instrumental Observations and Modeling
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Global Ionospheric and Thermospheric Effects of the June 2015 Geomagnetic Disturbances: Multi-Instrumental Observations and Modeling

机译：全球电离层和Thermospheric的影响2015年6月:磁场干扰Multi-Instrumental观察和建模

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By using data from multiple instruments, we investigate ionospheric/thermospheric behavior during the period from 21 to 23 June 2015, when three interplanetary shocks (IS) of different intensities arrived at Earth. The first IS was registered at 16:45 UT on 21 June and caused ~50 nT increase in the SYM-H index. The second IS arrived at 5:45 UT on 22 June and induced an enhancement of the auroral/substorm activity that led to rapid increase of thermospheric neutral mass density and ionospheric vertical total electron content at high latitudes. Several hours later, topside electron content and electron density increased at low latitudes on the nightside. The third and much larger IS arrived at 18:30 UT on 22 June and initiated a major geomagnetic storm that lasted for many hours. The storm provoked significant effects in the thermosphere and ionosphere on both dayside and nightside. In the thermosphere, the dayside neutral mass density exceeded the quiet time levels by 300-500%, with stronger effects in the summer hemisphere. In the ionosphere, both positive and negative storm effects were observed on both dayside and nightside. We compared the ionospheric observations with simulations by the coupled Sami3 is Also a Model of the Ionosphere/Rice Convection Model (SAMI3/RCM) model. We find rather good agreement between the data and the model for the first phase of the storm, when the prompt penetration electric field (PPEF) was the principal driver. At the end of the storm main phase, when the ionospheric effects were, most likely, driven by a combination of PPEF and thermospheric winds, the modeling results agree less with the observations.
机译：通过使用来自多个设备的数据,我们电离层/ thermospheric行为进行调查从2015年6月21日至23日期间,当三个星际冲击是不同的强度到达地球。注册6月21日16时UT和引起~ 50nT SYM-H指数增加。6月22日抵达5:45 UT和诱导增强的极光/亚暴活动导致thermospheric中性的快速增加质量密度和电离层垂直高纬度地区电子内容。后,在上面的电子内容和电子在低纬度地区密度增加阴面。6月22日晚上6:30 UT和启动的重大地磁风暴持续了几个小时。风暴引发了显著影响热大气层、电离层的光面和阴面。中性的质量密度超过了安静的时间300 - 500%的水平,与更强的影响夏天的半球。积极的和消极的风暴影响观察的光面和阴面。电离层观测与模拟的耦合Sami3也是一个模型电离层/大米对流模型(SAMI3 / RCM)模型。数据和模型的第一阶段风暴,当提示渗透电场(PPEF)是主要的驱动因素。风暴的主要阶段,电离层影响,最有可能的是,由一个驱动的结合PPEF thermospheric风,建模结果不同意观察。

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