Sawtooth and dune auroras simultaneously driven by waves around the plasmapause
The dune aurora, at a scale of ~30 kilometers, was reported recently using ground camera. The small-scale dune aurora occurs on the duskside and exhibits a monochromatic oscillation in the auroral emission, implying fundamental energy conversions. However, whether the dune auroras correspond to atmo...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Science Press
2023-03-01
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| Series: | Earth and Planetary Physics |
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| Online Access: | http://www.eppcgs.org/article/doi/10.26464/epp2023023?pageType=en |
| _version_ | 1797881299554271232 |
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| author | Fei He ZhongHua Yao BinBin Ni Xing Cao ShengYi Ye RuiLong Guo JinXing Li ZhiPeng Ren XinAn Yue YongLiang Zhang Yong Wei XiaoXin Zhang ZuYin Pu |
| author_facet | Fei He ZhongHua Yao BinBin Ni Xing Cao ShengYi Ye RuiLong Guo JinXing Li ZhiPeng Ren XinAn Yue YongLiang Zhang Yong Wei XiaoXin Zhang ZuYin Pu |
| author_sort | Fei He |
| collection | DOAJ |
| description | The dune aurora, at a scale of ~30 kilometers, was reported recently using ground camera. The small-scale dune aurora occurs on the duskside and exhibits a monochromatic oscillation in the auroral emission, implying fundamental energy conversions. However, whether the dune auroras correspond to atmospheric waves or are associated with magnetospheric dynamics should be determined. This paper reports a dune aurora that occurred during a storm; further, we demonstrate that it was the substructure of the sawtooth aurora that was generated by plasmapause surface waves. Conjugate observations in the magnetospheric source region suggest that the exohiss waves, which are periodically modulated by the plasmapause surface wave-excited ultralow frequency wave, might be responsible for the generation of the dune aurora. Most reported dune aurora events have occurred simultaneously with sawtooth auroras, suggesting that both are plasmapause-driven cross-scale auroral structures. |
| first_indexed | 2024-04-10T03:16:40Z |
| format | Article |
| id | doaj.art-9bbd50b3c01c4f14889f116ddc5a2d5e |
| institution | Directory Open Access Journal |
| issn | 2096-3955 |
| language | English |
| last_indexed | 2024-04-10T03:16:40Z |
| publishDate | 2023-03-01 |
| publisher | Science Press |
| record_format | Article |
| series | Earth and Planetary Physics |
| spelling | doaj.art-9bbd50b3c01c4f14889f116ddc5a2d5e2023-03-13T07:31:31ZengScience PressEarth and Planetary Physics2096-39552023-03-017223724610.26464/epp2023023RA352-hefeiSawtooth and dune auroras simultaneously driven by waves around the plasmapauseFei He0ZhongHua Yao1BinBin Ni2Xing Cao3ShengYi Ye4RuiLong Guo5JinXing Li6ZhiPeng Ren7XinAn Yue8YongLiang Zhang9Yong Wei10XiaoXin Zhang11ZuYin Pu12Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaDepartment of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, ChinaDepartment of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, ChinaDepartment of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen 518055, ChinaInstitute of Space Sciences, Shandong University, Weihai Shandong 264209, ChinaDepartment of Atmospheric and Oceanic Sciences, University of California, Los Angeles, California, USAKey Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaJohns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USAKey Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Space Weather, National Center for Space Weather, China Meteorological Administration, Beijing 100081, ChinaInstitute of Space Physics and Applied Technology, Peking University, Beijing 100871, ChinaThe dune aurora, at a scale of ~30 kilometers, was reported recently using ground camera. The small-scale dune aurora occurs on the duskside and exhibits a monochromatic oscillation in the auroral emission, implying fundamental energy conversions. However, whether the dune auroras correspond to atmospheric waves or are associated with magnetospheric dynamics should be determined. This paper reports a dune aurora that occurred during a storm; further, we demonstrate that it was the substructure of the sawtooth aurora that was generated by plasmapause surface waves. Conjugate observations in the magnetospheric source region suggest that the exohiss waves, which are periodically modulated by the plasmapause surface wave-excited ultralow frequency wave, might be responsible for the generation of the dune aurora. Most reported dune aurora events have occurred simultaneously with sawtooth auroras, suggesting that both are plasmapause-driven cross-scale auroral structures.http://www.eppcgs.org/article/doi/10.26464/epp2023023?pageType=ensawtooth auroradune auroraplasmapause surface waveexohiss |
| spellingShingle | Fei He ZhongHua Yao BinBin Ni Xing Cao ShengYi Ye RuiLong Guo JinXing Li ZhiPeng Ren XinAn Yue YongLiang Zhang Yong Wei XiaoXin Zhang ZuYin Pu Sawtooth and dune auroras simultaneously driven by waves around the plasmapause Earth and Planetary Physics sawtooth aurora dune aurora plasmapause surface wave exohiss |
| title | Sawtooth and dune auroras simultaneously driven by waves around the plasmapause |
| title_full | Sawtooth and dune auroras simultaneously driven by waves around the plasmapause |
| title_fullStr | Sawtooth and dune auroras simultaneously driven by waves around the plasmapause |
| title_full_unstemmed | Sawtooth and dune auroras simultaneously driven by waves around the plasmapause |
| title_short | Sawtooth and dune auroras simultaneously driven by waves around the plasmapause |
| title_sort | sawtooth and dune auroras simultaneously driven by waves around the plasmapause |
| topic | sawtooth aurora dune aurora plasmapause surface wave exohiss |
| url | http://www.eppcgs.org/article/doi/10.26464/epp2023023?pageType=en |
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