Electromagnetic energy deposition rate in the polar upper thermosphere derived from the EISCAT Svalbard radar and CUTLASS Finland radar observations
International audience From simultaneous observations of the European incoherent scatter Svalbard radar (ESR) and the Cooperative UK Twin Located Auroral Sounding System (CUTLASS) Finland radar on 9 March 1999, we have derived the height distributions of the thermospheric heating rate at the F regio...
Main Authors: | , , , , , , , , |
---|---|
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2007
|
Subjects: | |
Online Access: | https://hal.science/hal-00318410 https://hal.science/hal-00318410/document https://hal.science/hal-00318410/file/angeo-25-2393-2007.pdf |
id |
ftinsu:oai:HAL:hal-00318410v1 |
---|---|
record_format |
openpolar |
spelling |
ftinsu:oai:HAL:hal-00318410v1 2024-04-28T08:17:35+00:00 Electromagnetic energy deposition rate in the polar upper thermosphere derived from the EISCAT Svalbard radar and CUTLASS Finland radar observations Fujiwara, H. Kataoka, R. Suzuki, M. Maeda, S. Nozawa, S. Hosokawa, K. Fukunishi, H. Sato, N. Lester, M. Department of Geophysics Graduate School of Science RIKEN - Institute of Physical and Chemical Research Japon (RIKEN) Faculty for the Study of Contemporary Society Solar-Terrestrial Environment Laboratory Nagoya (STEL) Nagoya University University of Electro-Communications Tokyo (UEC) National Institute of Polar Research Tokyo (NiPR) Department of Physics and Astronomy Leicester University of Leicester 2007-11-29 https://hal.science/hal-00318410 https://hal.science/hal-00318410/document https://hal.science/hal-00318410/file/angeo-25-2393-2007.pdf en eng HAL CCSD European Geosciences Union hal-00318410 https://hal.science/hal-00318410 https://hal.science/hal-00318410/document https://hal.science/hal-00318410/file/angeo-25-2393-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00318410 Annales Geophysicae, 2007, 25 (11), pp.2393-2403 [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 2007 ftinsu 2024-04-05T00:38:11Z International audience From simultaneous observations of the European incoherent scatter Svalbard radar (ESR) and the Cooperative UK Twin Located Auroral Sounding System (CUTLASS) Finland radar on 9 March 1999, we have derived the height distributions of the thermospheric heating rate at the F region height in association with electromagnetic energy inputs into the dayside polar cap/cusp region. The ESR and CUTLASS radar observations provide the ionospheric parameters with fine time-resolutions of a few minutes. Although the geomagnetic activity was rather moderate ( Kp =3 + ~4), the electric field obtained from the ESR data sometimes shows values exceeding 40 mV/m. The estimated passive energy deposition rates are also larger than 150 W/kg in the upper thermosphere over the ESR site during the period of the enhanced electric field. In addition, enhancements of the Pedersen conductivity also contribute to heating the upper thermosphere, while there is only a small contribution for thermospheric heating from the direct particle heating due to soft particle precipitation in the dayside polar cap/cusp region. In the same period, the CUTLASS observations of the ion drift show the signature of poleward moving pulsed ionospheric flows with a recurrence rate of about 10?20 min. The estimated electromagnetic energy deposition rate shows the existence of the strong heat source in the dayside polar cap/cusp region of the upper thermosphere in association with the dayside magnetospheric phenomena of reconnections and flux transfer events. Article in Journal/Newspaper EISCAT Svalbard Institut national des sciences de l'Univers: HAL-INSU |
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 Fujiwara, H. Kataoka, R. Suzuki, M. Maeda, S. Nozawa, S. Hosokawa, K. Fukunishi, H. Sato, N. Lester, M. Electromagnetic energy deposition rate in the polar upper thermosphere derived from the EISCAT Svalbard radar and CUTLASS Finland radar observations |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience From simultaneous observations of the European incoherent scatter Svalbard radar (ESR) and the Cooperative UK Twin Located Auroral Sounding System (CUTLASS) Finland radar on 9 March 1999, we have derived the height distributions of the thermospheric heating rate at the F region height in association with electromagnetic energy inputs into the dayside polar cap/cusp region. The ESR and CUTLASS radar observations provide the ionospheric parameters with fine time-resolutions of a few minutes. Although the geomagnetic activity was rather moderate ( Kp =3 + ~4), the electric field obtained from the ESR data sometimes shows values exceeding 40 mV/m. The estimated passive energy deposition rates are also larger than 150 W/kg in the upper thermosphere over the ESR site during the period of the enhanced electric field. In addition, enhancements of the Pedersen conductivity also contribute to heating the upper thermosphere, while there is only a small contribution for thermospheric heating from the direct particle heating due to soft particle precipitation in the dayside polar cap/cusp region. In the same period, the CUTLASS observations of the ion drift show the signature of poleward moving pulsed ionospheric flows with a recurrence rate of about 10?20 min. The estimated electromagnetic energy deposition rate shows the existence of the strong heat source in the dayside polar cap/cusp region of the upper thermosphere in association with the dayside magnetospheric phenomena of reconnections and flux transfer events. |
author2 |
Department of Geophysics Graduate School of Science RIKEN - Institute of Physical and Chemical Research Japon (RIKEN) Faculty for the Study of Contemporary Society Solar-Terrestrial Environment Laboratory Nagoya (STEL) Nagoya University University of Electro-Communications Tokyo (UEC) National Institute of Polar Research Tokyo (NiPR) Department of Physics and Astronomy Leicester University of Leicester |
format |
Article in Journal/Newspaper |
author |
Fujiwara, H. Kataoka, R. Suzuki, M. Maeda, S. Nozawa, S. Hosokawa, K. Fukunishi, H. Sato, N. Lester, M. |
author_facet |
Fujiwara, H. Kataoka, R. Suzuki, M. Maeda, S. Nozawa, S. Hosokawa, K. Fukunishi, H. Sato, N. Lester, M. |
author_sort |
Fujiwara, H. |
title |
Electromagnetic energy deposition rate in the polar upper thermosphere derived from the EISCAT Svalbard radar and CUTLASS Finland radar observations |
title_short |
Electromagnetic energy deposition rate in the polar upper thermosphere derived from the EISCAT Svalbard radar and CUTLASS Finland radar observations |
title_full |
Electromagnetic energy deposition rate in the polar upper thermosphere derived from the EISCAT Svalbard radar and CUTLASS Finland radar observations |
title_fullStr |
Electromagnetic energy deposition rate in the polar upper thermosphere derived from the EISCAT Svalbard radar and CUTLASS Finland radar observations |
title_full_unstemmed |
Electromagnetic energy deposition rate in the polar upper thermosphere derived from the EISCAT Svalbard radar and CUTLASS Finland radar observations |
title_sort |
electromagnetic energy deposition rate in the polar upper thermosphere derived from the eiscat svalbard radar and cutlass finland radar observations |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00318410 https://hal.science/hal-00318410/document https://hal.science/hal-00318410/file/angeo-25-2393-2007.pdf |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00318410 Annales Geophysicae, 2007, 25 (11), pp.2393-2403 |
op_relation |
hal-00318410 https://hal.science/hal-00318410 https://hal.science/hal-00318410/document https://hal.science/hal-00318410/file/angeo-25-2393-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1797582080114163712 |