ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter
International audience HF radar backscatter which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø has been demonstrated to provide ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate U...
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ftinsu:oai:HAL:hal-00316759v1 2023-11-12T04:16:37+01:00 ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter Yeoman, T. K. Wright, D. M. Department of Physics and Astronomy Leicester University of Leicester 2001 https://hal.science/hal-00316759 https://hal.science/hal-00316759/document https://hal.science/hal-00316759/file/angeo-19-159-2001.pdf en eng HAL CCSD European Geosciences Union hal-00316759 https://hal.science/hal-00316759 https://hal.science/hal-00316759/document https://hal.science/hal-00316759/file/angeo-19-159-2001.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316759 Annales Geophysicae, 2001, 19 (2), pp.159-170 [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 2001 ftinsu 2023-10-25T16:25:30Z International audience HF radar backscatter which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø has been demonstrated to provide ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate ULF wave processes observed by the CUTLASS HF radars. Within a short period of time during a single four hour experiment three distinct wave types are observed with differing periods, and latitudinal and longitudinal phase evolution. Combining information from the three waves allows them to be divided into those with a large-scale nature, driven externally to the magnetosphere, and those with small azimuthal scale lengths, driven by wave-particle interactions. Furthermore, the nature of the wave-particle interactions for two distinct small-scale waves is revealed, with one wave interpreted as being driven by a drift resonance process and the other by a drift-bounce resonance interaction. Both of these mechanisms with m ? -35 and proton energies of 35?45 keV appear to be viable wave energy sources in the postnoon sector. Article in Journal/Newspaper EISCAT Tromsø Institut national des sciences de l'Univers: HAL-INSU Tromsø |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
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 Yeoman, T. K. Wright, D. M. ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience HF radar backscatter which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø has been demonstrated to provide ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate ULF wave processes observed by the CUTLASS HF radars. Within a short period of time during a single four hour experiment three distinct wave types are observed with differing periods, and latitudinal and longitudinal phase evolution. Combining information from the three waves allows them to be divided into those with a large-scale nature, driven externally to the magnetosphere, and those with small azimuthal scale lengths, driven by wave-particle interactions. Furthermore, the nature of the wave-particle interactions for two distinct small-scale waves is revealed, with one wave interpreted as being driven by a drift resonance process and the other by a drift-bounce resonance interaction. Both of these mechanisms with m ? -35 and proton energies of 35?45 keV appear to be viable wave energy sources in the postnoon sector. |
author2 |
Department of Physics and Astronomy Leicester University of Leicester |
format |
Article in Journal/Newspaper |
author |
Yeoman, T. K. Wright, D. M. |
author_facet |
Yeoman, T. K. Wright, D. M. |
author_sort |
Yeoman, T. K. |
title |
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
title_short |
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
title_full |
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
title_fullStr |
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
title_full_unstemmed |
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
title_sort |
ulf waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced hf radar backscatter |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal.science/hal-00316759 https://hal.science/hal-00316759/document https://hal.science/hal-00316759/file/angeo-19-159-2001.pdf |
geographic |
Tromsø |
geographic_facet |
Tromsø |
genre |
EISCAT Tromsø |
genre_facet |
EISCAT Tromsø |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316759 Annales Geophysicae, 2001, 19 (2), pp.159-170 |
op_relation |
hal-00316759 https://hal.science/hal-00316759 https://hal.science/hal-00316759/document https://hal.science/hal-00316759/file/angeo-19-159-2001.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782333694023827456 |