Mesoscale Features in the Global Geospace Response to the March 12, 2012 Storm
Mesoscale Features in the Global Geospace Response to the March 12, 2012 Storm
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DOI：
10.3389/fspas.2021.746459
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发表时间：
2021-10
期刊：
影响因子：
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通讯作者：
M. Adewuyi;A. Keesee;Y. Nishimura;C. Gabrielse;R. Katus
中科院分区：
文献类型：
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作者：
M. Adewuyi;A. Keesee;Y. Nishimura;C. Gabrielse;R. Katus
地球空间对日冕物质抛射的反应包括许多区域的现象，从向阳面和磁尾的重联，通过内磁层，到电离层，甚至到地面。在每个区域发生的现象往往通过磁场相互联系，但在风暴和亚暴期间，磁场会发生动态变化。要加深我们对地球空间对风暴的反应的理解，就需要一幅全球图景，使我们能够同时以空间和时间分辨率观察所有区域。利用两个广角成像中性原子光谱仪（TMF）使命上的高能中性原子成像仪，可以计算温度图，提供磁尾的全局视图。这些地图与GOES 13和15在地球同步轨道上的原位测量，来自所有天空成像仪（ASI）的极光图像以及地面磁力计测量相结合，以检查2012年3月12日日冕物质抛射（CME）驱动事件的全球地球空间响应。磁尾中尺度特征在整个时间间隔内，包括风暴开始之前和主相期间，这对导致内磁层压力积聚的主导过程有影响。极光增强，可以通过磁层电离层耦合与这些磁尾功能，观察到出现后，全球重新配置的磁场。
The geospace response to coronal mass ejections includes phenomena across many regions, from reconnection at the dayside and magnetotail, through the inner magnetosphere, to the ionosphere, and even to the ground. Phenomena occurring in each region are often connected to each other through the magnetic field, but that field undergoes dynamic changes during storms and substorms. Improving our understanding of the geospace response to storms requires a global picture that enables us to observe all the regions simultaneously with both spatial and temporal resolution. Using the Energetic Neutral Atom (ENA) imager on the Two Wide-Angle Imaging Neutral-Atom Spectrometers (TWINS) mission, a temperature map can be calculated to provide a global view of the magnetotail. These maps are combined with in situ measurements at geosynchronous orbit from GOES 13 and 15, auroral images from all sky imagers (ASIs), and ground magnetometer measurements to examine the global geospace response of a coronal mass ejection (CME) driven event on March 12th, 2012. Mesoscale features in the magnetotail are observed throughout the interval, including prior to the storm commencement and during the main phase, which has implications for the dominant processes that lead to pressure buildup in the inner magnetosphere. Auroral enhancements that can be associated with these magnetotail features through magnetosphere-ionosphere coupling are observed to appear only after global reconfigurations of the magnetic field.