Pc3-4 ULF waves observed by the SuperDARN TIGER radar
International audience Despite extensive research, the mechanisms for propagation of Pc3-4 energy from the generation region at the bow shock to the high-latitude ionosphere remain unresolved. We used high temporal (6-12s) and spatial (45km) resolution data from the SuperDARN TIGER radar (Tasmania)...
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ftccsdartic:oai:HAL:hal-00317712v1 2023-11-12T04:20:49+01:00 Pc3-4 ULF waves observed by the SuperDARN TIGER radar Ponomarenko, P. V. Menk, F. W. Waters, C. L. Sciffer, M. D. University of Newcastle Newcastle University Newcastle CRC for Satellite Systems 2005-06-03 https://hal.science/hal-00317712 https://hal.science/hal-00317712/document https://hal.science/hal-00317712/file/angeo-23-1271-2005.pdf en eng HAL CCSD European Geosciences Union hal-00317712 https://hal.science/hal-00317712 https://hal.science/hal-00317712/document https://hal.science/hal-00317712/file/angeo-23-1271-2005.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317712 Annales Geophysicae, 2005, 23 (4), pp.1271-1280 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2005 ftccsdartic 2023-10-21T23:07:13Z International audience Despite extensive research, the mechanisms for propagation of Pc3-4 energy from the generation region at the bow shock to the high-latitude ionosphere remain unresolved. We used high temporal (6-12s) and spatial (45km) resolution data from the SuperDARN TIGER radar (Tasmania) to examine Pc3-4 wave signatures at the F-region heights. We focus on a case study on 28 September 2000, when large-amplitude band-limited Pc3-4 oscillations were observed across 10-20 range gates in beam #4 (which points towards the CGM pole) for about four hours preceding MLT noon. These waves were detected in sea-scatter echoes reflected from the ionospheric footprint of the plasmatrough. Nearby ground magnetometer data from Macquarie Island showed very similar variations in both the north-south and east-west components. The radar data revealed the occasional presence of quasi-FLR (field-line resonance) spatial structures with frequencies much higher than those of the local fundamental FLR modes. Detailed spectral analysis of the ionospheric and ground data shows that these structures most probably correspond to a 3rd-harmonic, poloidal-mode FLR. Such observations suggest that compressional Pc3-4 waves produced in the upstream solar wind travel earthward from the magnetopause in the magnetic equatorial plane depositing energy into the Alfvenic modes, as either forced or 3rd-harmonic FLR that reach ionospheric heights along magnetic field lines. Article in Journal/Newspaper Macquarie Island Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Ponomarenko, P. V. Menk, F. W. Waters, C. L. Sciffer, M. D. Pc3-4 ULF waves observed by the SuperDARN TIGER radar |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Despite extensive research, the mechanisms for propagation of Pc3-4 energy from the generation region at the bow shock to the high-latitude ionosphere remain unresolved. We used high temporal (6-12s) and spatial (45km) resolution data from the SuperDARN TIGER radar (Tasmania) to examine Pc3-4 wave signatures at the F-region heights. We focus on a case study on 28 September 2000, when large-amplitude band-limited Pc3-4 oscillations were observed across 10-20 range gates in beam #4 (which points towards the CGM pole) for about four hours preceding MLT noon. These waves were detected in sea-scatter echoes reflected from the ionospheric footprint of the plasmatrough. Nearby ground magnetometer data from Macquarie Island showed very similar variations in both the north-south and east-west components. The radar data revealed the occasional presence of quasi-FLR (field-line resonance) spatial structures with frequencies much higher than those of the local fundamental FLR modes. Detailed spectral analysis of the ionospheric and ground data shows that these structures most probably correspond to a 3rd-harmonic, poloidal-mode FLR. Such observations suggest that compressional Pc3-4 waves produced in the upstream solar wind travel earthward from the magnetopause in the magnetic equatorial plane depositing energy into the Alfvenic modes, as either forced or 3rd-harmonic FLR that reach ionospheric heights along magnetic field lines. |
author2 |
University of Newcastle Newcastle University Newcastle CRC for Satellite Systems |
format |
Article in Journal/Newspaper |
author |
Ponomarenko, P. V. Menk, F. W. Waters, C. L. Sciffer, M. D. |
author_facet |
Ponomarenko, P. V. Menk, F. W. Waters, C. L. Sciffer, M. D. |
author_sort |
Ponomarenko, P. V. |
title |
Pc3-4 ULF waves observed by the SuperDARN TIGER radar |
title_short |
Pc3-4 ULF waves observed by the SuperDARN TIGER radar |
title_full |
Pc3-4 ULF waves observed by the SuperDARN TIGER radar |
title_fullStr |
Pc3-4 ULF waves observed by the SuperDARN TIGER radar |
title_full_unstemmed |
Pc3-4 ULF waves observed by the SuperDARN TIGER radar |
title_sort |
pc3-4 ulf waves observed by the superdarn tiger radar |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00317712 https://hal.science/hal-00317712/document https://hal.science/hal-00317712/file/angeo-23-1271-2005.pdf |
genre |
Macquarie Island |
genre_facet |
Macquarie Island |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317712 Annales Geophysicae, 2005, 23 (4), pp.1271-1280 |
op_relation |
hal-00317712 https://hal.science/hal-00317712 https://hal.science/hal-00317712/document https://hal.science/hal-00317712/file/angeo-23-1271-2005.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782336566655451136 |