Energy Conversion in the Dip Region Preceding Dipolarization Front
Abstract Dipolarization fronts (DFs), characterized by sharp increases in the northward magnetic field and usually preceded by magnetic dips, are suggested to play an important role in energy conversion and transport in the magnetotail. It has been documented that strong energy conversion typically...
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| Format: | Article |
| Language: | English |
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Wiley
2024-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL109860 |
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| author | B. N. Zhao C. M. Liu J. B. Cao Y. Y. Liu X. N. Xing |
| author_facet | B. N. Zhao C. M. Liu J. B. Cao Y. Y. Liu X. N. Xing |
| author_sort | B. N. Zhao |
| collection | DOAJ |
| description | Abstract Dipolarization fronts (DFs), characterized by sharp increases in the northward magnetic field and usually preceded by magnetic dips, are suggested to play an important role in energy conversion and transport in the magnetotail. It has been documented that strong energy conversion typically develops right at the fronts. Here we present spacecraft observations of electron‐scale energy conversion (EEC) developed inside the dip region ahead of a DF, by using high‐cadence data from the Magnetospheric Multiscale Mission. The EEC, with magnitude comparable to that at the front, is primarily driven by ion current and electron‐scale electric field. The electric field inside the dip is provided by electrostatic waves fed by lower hybrid drift instability, which experiences temporal decaying. Such decaying leads to nonhomogeneity of EEC along the dawn‐dusk direction. These results, uncovering a new channel for DF‐driven energy conversion, can provide important insights into understanding energy transport in the magnetotail. |
| format | Article |
| id | doaj-art-66a38bf832f4410d847c045bbfc2df0c |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-66a38bf832f4410d847c045bbfc2df0c2025-08-20T02:04:21ZengWileyGeophysical Research Letters0094-82761944-80072024-07-015113n/an/a10.1029/2024GL109860Energy Conversion in the Dip Region Preceding Dipolarization FrontB. N. Zhao0C. M. Liu1J. B. Cao2Y. Y. Liu3X. N. Xing4School of Space and Environment Beihang University Beijing ChinaSchool of Space and Environment Beihang University Beijing ChinaSchool of Space and Environment Beihang University Beijing ChinaSchool of Space and Environment Beihang University Beijing ChinaSchool of Space and Environment Beihang University Beijing ChinaAbstract Dipolarization fronts (DFs), characterized by sharp increases in the northward magnetic field and usually preceded by magnetic dips, are suggested to play an important role in energy conversion and transport in the magnetotail. It has been documented that strong energy conversion typically develops right at the fronts. Here we present spacecraft observations of electron‐scale energy conversion (EEC) developed inside the dip region ahead of a DF, by using high‐cadence data from the Magnetospheric Multiscale Mission. The EEC, with magnitude comparable to that at the front, is primarily driven by ion current and electron‐scale electric field. The electric field inside the dip is provided by electrostatic waves fed by lower hybrid drift instability, which experiences temporal decaying. Such decaying leads to nonhomogeneity of EEC along the dawn‐dusk direction. These results, uncovering a new channel for DF‐driven energy conversion, can provide important insights into understanding energy transport in the magnetotail.https://doi.org/10.1029/2024GL109860dipolarization frontdip regionenergy conversion |
| spellingShingle | B. N. Zhao C. M. Liu J. B. Cao Y. Y. Liu X. N. Xing Energy Conversion in the Dip Region Preceding Dipolarization Front Geophysical Research Letters dipolarization front dip region energy conversion |
| title | Energy Conversion in the Dip Region Preceding Dipolarization Front |
| title_full | Energy Conversion in the Dip Region Preceding Dipolarization Front |
| title_fullStr | Energy Conversion in the Dip Region Preceding Dipolarization Front |
| title_full_unstemmed | Energy Conversion in the Dip Region Preceding Dipolarization Front |
| title_short | Energy Conversion in the Dip Region Preceding Dipolarization Front |
| title_sort | energy conversion in the dip region preceding dipolarization front |
| topic | dipolarization front dip region energy conversion |
| url | https://doi.org/10.1029/2024GL109860 |
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