Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry–Perot interferometer in Tromsø, Norway ...
Abstract Ion drag associated with the ionospheric plasma convection plays an important role in the high-latitude thermospheric dynamics, yet changes in the thermospheric wind with geomagnetic activity are not fully understood. We performed a statistical analysis of the thermospheric wind measurement...
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ftdatacite:10.6084/m9.figshare.c.6631629 2024-09-15T18:39:22+00:00 Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry–Perot interferometer in Tromsø, Norway ... Oyama, Shin-ichiro Aikio, Anita Sakanoi, Takeshi Hosokawa, Keisuke Vanhamäki, Heikki Cai, Lei Virtanen, Ilkka Pedersen, Marcus Shiokawa, Kazuo Shinbori, Atsuki Nishitani, Nozomu Ogawa, Yasunobu 2024 https://dx.doi.org/10.6084/m9.figshare.c.6631629 https://springernature.figshare.com/collections/Geomagnetic_activity_dependence_and_dawn-dusk_asymmetry_of_thermospheric_winds_from_9-year_measurements_with_a_Fabry_Perot_interferometer_in_Troms_Norway/6631629 unknown figshare Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 Physical Sciences not elsewhere classified Ecology FOS: Biological sciences Astronomical and Space Sciences not elsewhere classified Biological Sciences not elsewhere classified Science Policy Mental Health Collection article 2024 ftdatacite https://doi.org/10.6084/m9.figshare.c.6631629 2024-09-02T08:18:07Z Abstract Ion drag associated with the ionospheric plasma convection plays an important role in the high-latitude thermospheric dynamics, yet changes in the thermospheric wind with geomagnetic activity are not fully understood. We performed a statistical analysis of the thermospheric wind measurements with a Fabry–Perot interferometer (FPI; 630 nm wavelength) in Tromsø, Norway, in the winter months for 9 years. The measurements were sorted by a SuperMAG (SME) index, and a quiet-time wind pattern was defined as an hourly mean under SME ≤ 40 nT. The quiet-time wind pattern can be expected to be represented by a pressure gradient associated with the solar radiation and a geostrophic force balance. With an increase in the geomagnetic activity level, the thermospheric wind turned over from eastward to westward at dusk and increased the equatorward magnitude from midnight to dawn. Deviations from the quiet-time wind presented similar patterns in the direction with the ionospheric plasma convection but were larger ... Article in Journal/Newspaper Tromsø DataCite |
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unknown |
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Physical Sciences not elsewhere classified Ecology FOS: Biological sciences Astronomical and Space Sciences not elsewhere classified Biological Sciences not elsewhere classified Science Policy Mental Health |
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Physical Sciences not elsewhere classified Ecology FOS: Biological sciences Astronomical and Space Sciences not elsewhere classified Biological Sciences not elsewhere classified Science Policy Mental Health Oyama, Shin-ichiro Aikio, Anita Sakanoi, Takeshi Hosokawa, Keisuke Vanhamäki, Heikki Cai, Lei Virtanen, Ilkka Pedersen, Marcus Shiokawa, Kazuo Shinbori, Atsuki Nishitani, Nozomu Ogawa, Yasunobu Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry–Perot interferometer in Tromsø, Norway ... |
topic_facet |
Physical Sciences not elsewhere classified Ecology FOS: Biological sciences Astronomical and Space Sciences not elsewhere classified Biological Sciences not elsewhere classified Science Policy Mental Health |
description |
Abstract Ion drag associated with the ionospheric plasma convection plays an important role in the high-latitude thermospheric dynamics, yet changes in the thermospheric wind with geomagnetic activity are not fully understood. We performed a statistical analysis of the thermospheric wind measurements with a Fabry–Perot interferometer (FPI; 630 nm wavelength) in Tromsø, Norway, in the winter months for 9 years. The measurements were sorted by a SuperMAG (SME) index, and a quiet-time wind pattern was defined as an hourly mean under SME ≤ 40 nT. The quiet-time wind pattern can be expected to be represented by a pressure gradient associated with the solar radiation and a geostrophic force balance. With an increase in the geomagnetic activity level, the thermospheric wind turned over from eastward to westward at dusk and increased the equatorward magnitude from midnight to dawn. Deviations from the quiet-time wind presented similar patterns in the direction with the ionospheric plasma convection but were larger ... |
format |
Article in Journal/Newspaper |
author |
Oyama, Shin-ichiro Aikio, Anita Sakanoi, Takeshi Hosokawa, Keisuke Vanhamäki, Heikki Cai, Lei Virtanen, Ilkka Pedersen, Marcus Shiokawa, Kazuo Shinbori, Atsuki Nishitani, Nozomu Ogawa, Yasunobu |
author_facet |
Oyama, Shin-ichiro Aikio, Anita Sakanoi, Takeshi Hosokawa, Keisuke Vanhamäki, Heikki Cai, Lei Virtanen, Ilkka Pedersen, Marcus Shiokawa, Kazuo Shinbori, Atsuki Nishitani, Nozomu Ogawa, Yasunobu |
author_sort |
Oyama, Shin-ichiro |
title |
Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry–Perot interferometer in Tromsø, Norway ... |
title_short |
Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry–Perot interferometer in Tromsø, Norway ... |
title_full |
Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry–Perot interferometer in Tromsø, Norway ... |
title_fullStr |
Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry–Perot interferometer in Tromsø, Norway ... |
title_full_unstemmed |
Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry–Perot interferometer in Tromsø, Norway ... |
title_sort |
geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a fabry–perot interferometer in tromsø, norway ... |
publisher |
figshare |
publishDate |
2024 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.6631629 https://springernature.figshare.com/collections/Geomagnetic_activity_dependence_and_dawn-dusk_asymmetry_of_thermospheric_winds_from_9-year_measurements_with_a_Fabry_Perot_interferometer_in_Troms_Norway/6631629 |
genre |
Tromsø |
genre_facet |
Tromsø |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.6084/m9.figshare.c.6631629 |
_version_ |
1810483761773543424 |