MMS Observations of Storm‐Time Magnetopause Boundary Layers in the Vicinity of the Southern Cusp
MMS Observations of Storm‐Time Magnetopause Boundary Layers in the Vicinity of the Southern Cusp
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风暴时磁层顶边界层在南尖端附近的MMS观测
DOI：
10.1029/2022gl101231
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发表时间：
2022-12
影响因子：
5.2
通讯作者：
B. Burkholder;Li‐Jen Chen;S. Fuselier;D. Gershman;C. Schiff;J. Shuster;Y. Zou;B. Walsh;P. Reiff;S. Petrinec;A. Sciola
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文献类型：
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作者：
B. Burkholder;Li‐Jen Chen;S. Fuselier;D. Gershman;C. Schiff;J. Shuster;Y. Zou;B. Walsh;P. Reiff;S. Petrinec;A. Sciola
在冬至前后的风暴期间，磁层多尺度(MMS)任务的观测显示，在南端附近有多个明显的磁层顶边界层(BLS)。风暴期间太阳风-磁层相互作用的微观物理还不是很清楚，因为观测相对较少。这一事件提供了探测风暴时磁层顶的机会，观测结果支持MMS在南端赤道方向的重联地点附近，这表明在BL中关闭的磁通量区附近有活动的重联。用于扩展研究应用的网格不可知磁流体力学(MHD)全球MHD模拟显示了南尖附近的瞬时二次重联位置的证据，展示了形成边界层闭合场线区域的机制。
During a storm‐time interval around winter solstice, observations by the Magnetospheric Multi‐Scale (MMS) Mission show multiple distinct magnetopause boundary layers (BLs) in the vicinity of the southern cusp. The microphysics of the solar wind‐magnetosphere interaction during storm times are not well understood, because the observations are relatively lacking. This event enables the opportunity to probe the storm‐time magnetopause, and observations support that MMS was near a reconnection site equatorward of the southern cusp, suggesting active reconnection in close proximity to closed magnetic flux regions in the BL. The Grid Agnostic magnetohydrodynamics (MHD) for Extended Research Applications global MHD simulation shows evidence for transient secondary reconnection sites near the southern cusp, demonstrating mechanisms to form closed field line regions of the BL.