Enhancement of electric and magnetic wave fields at density gradients
We use Freja satellite data to investigate irregular small-scale density variations. The observations are made in the auroral region at about 1000-1700 km. The density variations are a few percent, and the structures are found to be spatial down to a scale length of a few ion gyroradii....
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2006-03-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/24/367/2006/angeo-24-367-2006.pdf |
| _version_ | 1818671599589523456 |
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| author | A. Reiniusson G. Stenberg G. Stenberg P. Norqvist A. I. Eriksson K. Rönnmark |
| author_facet | A. Reiniusson G. Stenberg G. Stenberg P. Norqvist A. I. Eriksson K. Rönnmark |
| author_sort | A. Reiniusson |
| collection | DOAJ |
| description | We use Freja satellite data to investigate irregular small-scale
density variations. The observations are made in the auroral region
at about 1000-1700 km. The density variations are a few percent, and the
structures are found to be spatial down to a scale length of a few ion
gyroradii. Irregular density variations are often found in an
environment of whistler mode/lower hybrid waves and we show that at
the density gradients both the electric and magnetic wave fields are
enhanced. |
| first_indexed | 2024-12-17T07:26:34Z |
| format | Article |
| id | doaj.art-34fe9b80eeee48bcbcd8ed037a3889a0 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-17T07:26:34Z |
| publishDate | 2006-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-34fe9b80eeee48bcbcd8ed037a3889a02022-12-21T21:58:36ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762006-03-012436737910.5194/angeo-24-367-2006Enhancement of electric and magnetic wave fields at density gradientsA. Reiniusson0G. Stenberg1G. Stenberg2P. Norqvist3A. I. Eriksson4K. Rönnmark5Department of Physics, Umeå University, Umeå, SwedenDepartment of Physics, Umeå University, Umeå, SwedenSwedish Institute of Space Physics, Uppsala, SwedenDepartment of Physics, Umeå University, Umeå, SwedenSwedish Institute of Space Physics, Uppsala, SwedenDepartment of Physics, Umeå University, Umeå, SwedenWe use Freja satellite data to investigate irregular small-scale density variations. The observations are made in the auroral region at about 1000-1700 km. The density variations are a few percent, and the structures are found to be spatial down to a scale length of a few ion gyroradii. Irregular density variations are often found in an environment of whistler mode/lower hybrid waves and we show that at the density gradients both the electric and magnetic wave fields are enhanced.https://www.ann-geophys.net/24/367/2006/angeo-24-367-2006.pdf |
| spellingShingle | A. Reiniusson G. Stenberg G. Stenberg P. Norqvist A. I. Eriksson K. Rönnmark Enhancement of electric and magnetic wave fields at density gradients Annales Geophysicae |
| title | Enhancement of electric and magnetic wave fields at density gradients |
| title_full | Enhancement of electric and magnetic wave fields at density gradients |
| title_fullStr | Enhancement of electric and magnetic wave fields at density gradients |
| title_full_unstemmed | Enhancement of electric and magnetic wave fields at density gradients |
| title_short | Enhancement of electric and magnetic wave fields at density gradients |
| title_sort | enhancement of electric and magnetic wave fields at density gradients |
| url | https://www.ann-geophys.net/24/367/2006/angeo-24-367-2006.pdf |
| work_keys_str_mv | AT areiniusson enhancementofelectricandmagneticwavefieldsatdensitygradients AT gstenberg enhancementofelectricandmagneticwavefieldsatdensitygradients AT gstenberg enhancementofelectricandmagneticwavefieldsatdensitygradients AT pnorqvist enhancementofelectricandmagneticwavefieldsatdensitygradients AT aieriksson enhancementofelectricandmagneticwavefieldsatdensitygradients AT kronnmark enhancementofelectricandmagneticwavefieldsatdensitygradients |