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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Global equatorial plasma bubble occurrence during the 2015 St. Patrick's Day storm
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Global equatorial plasma bubble occurrence during the 2015 St. Patrick's Day storm

机译：全球赤道等离子体泡沫出现时2015年的圣派翠克日风暴

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摘要

An analysis of the occurrence of equatorial plasma bubbles (EPBs) around the world during the 2015 St. Patrick's Day geomagnetic storm is presented. A network of 12 Global Positioning System receivers spanning from South America to Southeast Asia was used, in addition to colocated VHF receivers at three stations and four nearby ionosondes. The suppression of postsunset EPBs was observed across most longitudes over 2 days. The EPB observations were compared to calculations of the linear Rayleigh-Taylor growth rate using coupled thermosphere-ionosphere modeling, which successfully modeled the transition of favorable EPB growth from postsunset to postmidnight hours during the storm. The mechanisms behind the growth of postmidnight EPBs during this storm were investigated. While the latter stages of postmidnight EPB growth were found to be dominated by disturbance dynamo effects, the initial stages of postmidnight EPB growth close to local midnight were found to be controlled by the higher altitudes of the plasma (i.e., the gravity term). Modeling and observations revealed that during the storm the ionospheric plasma was redistributed to higher altitudes in the low-latitude region, which made the plasma more susceptible to Rayleigh-Taylor growth prior to the dominance of the disturbance dynamo in the eventual generation of postmidnight EPBs.
机译：赤道的发生等离子体的分析世界各地的泡沫(epb)在2015年圣帕特里克节磁暴。12个全球定位系统的网络接收器从南美洲东南亚,除了托管的甚高频接收器在附近三站和四个ionosondes。跨经度/ 2天观察。EPB的观察比较计算线性瑞利泰勒的增长使用耦合thermosphere-ionosphere率建模,成功地模拟了过渡的有利EPB增长postsunset postmidnight小时期间风暴。在这场风暴中,postmidnight引擎组件调查。postmidnight EPB增长被发现由干扰发电机效应,初级阶段的postmidnight EPB增长接近当地午夜被发现是由等离子体的高海拔(即重力项)。在暴风雨中电离层等离子体重新分配到海拔较高的地方低纬度地区,这使得等离子体容易受到瑞利泰勒增长之前的干扰发电机的统治地位最终代postmidnight引擎组件。

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