Global-scale magnetosphere convection driven by dayside magnetic reconnection
Abstract Plasma convection on a global scale is a fundamental feature of planetary magnetosphere. The Dungey cycle explains that steady-state convection within the closed part of the magnetosphere relies on magnetic reconnection in the nightside magnetospheric tail. Nevertheless, time-dependent mode...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2024-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-44992-y |
| _version_ | 1797349869790167040 |
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| author | Lei Dai Minghui Zhu Yong Ren Walter Gonzalez Chi Wang David Sibeck Andrey Samsonov Philippe Escoubet Binbin Tang Jiaojiao Zhang Graziella Branduardi-Raymont |
| author_facet | Lei Dai Minghui Zhu Yong Ren Walter Gonzalez Chi Wang David Sibeck Andrey Samsonov Philippe Escoubet Binbin Tang Jiaojiao Zhang Graziella Branduardi-Raymont |
| author_sort | Lei Dai |
| collection | DOAJ |
| description | Abstract Plasma convection on a global scale is a fundamental feature of planetary magnetosphere. The Dungey cycle explains that steady-state convection within the closed part of the magnetosphere relies on magnetic reconnection in the nightside magnetospheric tail. Nevertheless, time-dependent models of the Dungey cycle suggest an alternative scenario where magnetospheric convection can be solely driven by dayside magnetic reconnection. In this study, we provide direct evidence supporting the scenario of dayside-driven magnetosphere convection. The driving process is closely connected to the evolution of Region 1 and Region 2 field-aligned currents. Our global simulations demonstrate that intensified magnetospheric convection and field-aligned currents progress from the dayside to the nightside within 10–20 minutes, following a southward turning of the interplanetary magnetic field. Observational data within this short timescale also reveal enhancements in both magnetosphere convection and the ionosphere’s two-cell convection. These findings provide insights into the mechanisms driving planetary magnetosphere convection, with implications for the upcoming Solar-Wind-Magnetosphere-Ionosphere Link Explorer (SMILE) mission. |
| first_indexed | 2024-03-08T12:36:37Z |
| format | Article |
| id | doaj.art-8beba557148e4f37951df9cf54baee99 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-08T12:36:37Z |
| publishDate | 2024-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-8beba557148e4f37951df9cf54baee992024-01-21T12:26:31ZengNature PortfolioNature Communications2041-17232024-01-011511810.1038/s41467-024-44992-yGlobal-scale magnetosphere convection driven by dayside magnetic reconnectionLei Dai0Minghui Zhu1Yong Ren2Walter Gonzalez3Chi Wang4David Sibeck5Andrey Samsonov6Philippe Escoubet7Binbin Tang8Jiaojiao Zhang9Graziella Branduardi-Raymont10National Space Science Center, Chinese Academy of SciencesNational Space Science Center, Chinese Academy of SciencesNational Space Science Center, Chinese Academy of SciencesNational Space Science Center, Chinese Academy of SciencesNational Space Science Center, Chinese Academy of SciencesGoddard Space Flight Center, NASAMullard Space Science Laboratory, University College LondonEuropean Space Research and Technology Centre, European Space Agency (ESA)National Space Science Center, Chinese Academy of SciencesNational Space Science Center, Chinese Academy of SciencesMullard Space Science Laboratory, University College LondonAbstract Plasma convection on a global scale is a fundamental feature of planetary magnetosphere. The Dungey cycle explains that steady-state convection within the closed part of the magnetosphere relies on magnetic reconnection in the nightside magnetospheric tail. Nevertheless, time-dependent models of the Dungey cycle suggest an alternative scenario where magnetospheric convection can be solely driven by dayside magnetic reconnection. In this study, we provide direct evidence supporting the scenario of dayside-driven magnetosphere convection. The driving process is closely connected to the evolution of Region 1 and Region 2 field-aligned currents. Our global simulations demonstrate that intensified magnetospheric convection and field-aligned currents progress from the dayside to the nightside within 10–20 minutes, following a southward turning of the interplanetary magnetic field. Observational data within this short timescale also reveal enhancements in both magnetosphere convection and the ionosphere’s two-cell convection. These findings provide insights into the mechanisms driving planetary magnetosphere convection, with implications for the upcoming Solar-Wind-Magnetosphere-Ionosphere Link Explorer (SMILE) mission.https://doi.org/10.1038/s41467-024-44992-y |
| spellingShingle | Lei Dai Minghui Zhu Yong Ren Walter Gonzalez Chi Wang David Sibeck Andrey Samsonov Philippe Escoubet Binbin Tang Jiaojiao Zhang Graziella Branduardi-Raymont Global-scale magnetosphere convection driven by dayside magnetic reconnection Nature Communications |
| title | Global-scale magnetosphere convection driven by dayside magnetic reconnection |
| title_full | Global-scale magnetosphere convection driven by dayside magnetic reconnection |
| title_fullStr | Global-scale magnetosphere convection driven by dayside magnetic reconnection |
| title_full_unstemmed | Global-scale magnetosphere convection driven by dayside magnetic reconnection |
| title_short | Global-scale magnetosphere convection driven by dayside magnetic reconnection |
| title_sort | global scale magnetosphere convection driven by dayside magnetic reconnection |
| url | https://doi.org/10.1038/s41467-024-44992-y |
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