ULF wave occurrence statistics in a high-latitude HF Doppler sounder
International audience Ultra low frequency (ULF) wave activity in the high-latitude ionosphere has been observed by a high frequency (HF) Doppler sounder located at Tromsø, Norway (69.7°N, 19.2°E geographic coordinates). A statistical study of the occurrence of these waves has been undertaken from d...
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ftinsu:oai:HAL:hal-00316608v1 2023-11-12T04:27:30+01:00 ULF wave occurrence statistics in a high-latitude HF Doppler sounder Wright, D. M. Yeoman, T. K. Jones, T. B. Department of Physics and Astronomy Leicester University of Leicester 1999 https://hal.science/hal-00316608 https://hal.science/hal-00316608/document https://hal.science/hal-00316608/file/angeo-17-749-1999.pdf en eng HAL CCSD European Geosciences Union hal-00316608 https://hal.science/hal-00316608 https://hal.science/hal-00316608/document https://hal.science/hal-00316608/file/angeo-17-749-1999.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316608 Annales Geophysicae, 1999, 17 (6), pp.749-758 [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 1999 ftinsu 2023-10-25T16:25:32Z International audience Ultra low frequency (ULF) wave activity in the high-latitude ionosphere has been observed by a high frequency (HF) Doppler sounder located at Tromsø, Norway (69.7°N, 19.2°E geographic coordinates). A statistical study of the occurrence of these waves has been undertaken from data collected between 1979 and 1984. The diurnal, seasonal, solar cycle and geomagnetic activity variations in occurrence have been investigated. The findings demonstrate that the ability of the sounder to detect ULF wave signatures maximises at the equinoxes and that there is a peak in occurrence in the morning sector. The occurrence rate is fairly insensitive to changes associated with the solar cycle but increases with the level of geomagnetic activity. As a result, it has been possible to characterise the way in which prevailing ionospheric and magnetospheric conditions affect such observations of ULF waves. Article in Journal/Newspaper Tromsø Institut national des sciences de l'Univers: HAL-INSU Norway Tromsø |
institution |
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 Wright, D. M. Yeoman, T. K. Jones, T. B. ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Ultra low frequency (ULF) wave activity in the high-latitude ionosphere has been observed by a high frequency (HF) Doppler sounder located at Tromsø, Norway (69.7°N, 19.2°E geographic coordinates). A statistical study of the occurrence of these waves has been undertaken from data collected between 1979 and 1984. The diurnal, seasonal, solar cycle and geomagnetic activity variations in occurrence have been investigated. The findings demonstrate that the ability of the sounder to detect ULF wave signatures maximises at the equinoxes and that there is a peak in occurrence in the morning sector. The occurrence rate is fairly insensitive to changes associated with the solar cycle but increases with the level of geomagnetic activity. As a result, it has been possible to characterise the way in which prevailing ionospheric and magnetospheric conditions affect such observations of ULF waves. |
author2 |
Department of Physics and Astronomy Leicester University of Leicester |
format |
Article in Journal/Newspaper |
author |
Wright, D. M. Yeoman, T. K. Jones, T. B. |
author_facet |
Wright, D. M. Yeoman, T. K. Jones, T. B. |
author_sort |
Wright, D. M. |
title |
ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
title_short |
ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
title_full |
ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
title_fullStr |
ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
title_full_unstemmed |
ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
title_sort |
ulf wave occurrence statistics in a high-latitude hf doppler sounder |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.science/hal-00316608 https://hal.science/hal-00316608/document https://hal.science/hal-00316608/file/angeo-17-749-1999.pdf |
geographic |
Norway Tromsø |
geographic_facet |
Norway Tromsø |
genre |
Tromsø |
genre_facet |
Tromsø |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316608 Annales Geophysicae, 1999, 17 (6), pp.749-758 |
op_relation |
hal-00316608 https://hal.science/hal-00316608 https://hal.science/hal-00316608/document https://hal.science/hal-00316608/file/angeo-17-749-1999.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782341083062075392 |