A Generation Mechanism of Banded Plasmaspheric Hiss
Abstract As a unique structure of plasmaspheric hiss emissions, banded hiss waves generally consist of an upper band above ∼200 Hz, a lower band below ∼100 Hz and a power gap in between. However, the generation mechanism of banded hiss remains unclear. Here we present a representative event of bande...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-04-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2024GL113809 |
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| _version_ | 1849387744995835904 |
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| author | Junhu Dong Binbin Ni Zheng Xiang Zhiyong Wu |
| author_facet | Junhu Dong Binbin Ni Zheng Xiang Zhiyong Wu |
| author_sort | Junhu Dong |
| collection | DOAJ |
| description | Abstract As a unique structure of plasmaspheric hiss emissions, banded hiss waves generally consist of an upper band above ∼200 Hz, a lower band below ∼100 Hz and a power gap in between. However, the generation mechanism of banded hiss remains unclear. Here we present a representative event of banded hiss co‐existing in both the plasmaspheric plume structure and the plasmasphere. The wave Poynting flux measurements and linear instability analysis suggest that banded hiss can be generated in the equatorial plume region. The ray tracing simulations further show that the plume structure enables banded hiss to propagate along the plasma density crest to higher latitudes, followed by the penetration into the plasmasphere. Our data analysis and modeling efforts provide a plausible mechanism for the generation of banded hiss, and also highlight the significant role of plume structure in the generation and propagation of magnetospheric whistler‐mode waves. |
| format | Article |
| id | doaj-art-ca47fbbd04cb45768a5d15a14ad19aca |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-ca47fbbd04cb45768a5d15a14ad19aca2025-08-20T03:44:25ZengWileyGeophysical Research Letters0094-82761944-80072025-04-01528n/an/a10.1029/2024GL113809A Generation Mechanism of Banded Plasmaspheric HissJunhu Dong0Binbin Ni1Zheng Xiang2Zhiyong Wu3School of Earth and Space Science and Technology Wuhan University Wuhan ChinaSchool of Earth and Space Science and Technology Wuhan University Wuhan ChinaSchool of Earth and Space Science and Technology Wuhan University Wuhan ChinaNational Key Laboratory of Deep Space Exploration/School of Earth and Space Sciences University of Science and Technology of China Hefei ChinaAbstract As a unique structure of plasmaspheric hiss emissions, banded hiss waves generally consist of an upper band above ∼200 Hz, a lower band below ∼100 Hz and a power gap in between. However, the generation mechanism of banded hiss remains unclear. Here we present a representative event of banded hiss co‐existing in both the plasmaspheric plume structure and the plasmasphere. The wave Poynting flux measurements and linear instability analysis suggest that banded hiss can be generated in the equatorial plume region. The ray tracing simulations further show that the plume structure enables banded hiss to propagate along the plasma density crest to higher latitudes, followed by the penetration into the plasmasphere. Our data analysis and modeling efforts provide a plausible mechanism for the generation of banded hiss, and also highlight the significant role of plume structure in the generation and propagation of magnetospheric whistler‐mode waves.https://doi.org/10.1029/2024GL113809 |
| spellingShingle | Junhu Dong Binbin Ni Zheng Xiang Zhiyong Wu A Generation Mechanism of Banded Plasmaspheric Hiss Geophysical Research Letters |
| title | A Generation Mechanism of Banded Plasmaspheric Hiss |
| title_full | A Generation Mechanism of Banded Plasmaspheric Hiss |
| title_fullStr | A Generation Mechanism of Banded Plasmaspheric Hiss |
| title_full_unstemmed | A Generation Mechanism of Banded Plasmaspheric Hiss |
| title_short | A Generation Mechanism of Banded Plasmaspheric Hiss |
| title_sort | generation mechanism of banded plasmaspheric hiss |
| url | https://doi.org/10.1029/2024GL113809 |
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