Ground-based and satellite observations of high-latitude auroral activity in the dusk sector of the auroral oval
International audience On 7 December 2000, during 13:30?15:30 UT the MIRACLE all-sky camera at Ny Ålesund observed auroras at high-latitudes (MLAT ~ 76) simultaneously when the Cluster spacecraft were skimming the magnetopause in the same MLT sector (at ~ 16:00?18:00 MLT). The location of the aurora...
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ftccsdartic:oai:HAL:hal-00316959v1 2023-11-12T04:23:33+01:00 Ground-based and satellite observations of high-latitude auroral activity in the dusk sector of the auroral oval Kauristie, K. Pulkkinen, T. I. Amm, O. Viljanen, A. Syrjäsuo, M. Janhunen, P. Massetti, S. Orsini, S. Candidi, M. Watermann, J. Donovan, E. Prikryl, P. Mann, I. R. Eglitis, P. Smith, C. Denig, W. F. Opgenoorth, H. J. Lockwood, M. Dunlop, M. Vaivads, A. André, M. Geophysical Research Division Helsinki Finnish Meteorological Institute (FMI) National Research Council of Italy Danish Meteorological Institute (DMI) University of Calgary Communications Research Centre Canada (CRC) University of York York, UK Swedish Institute of Space Physics Kiruna (IRF) Bartol Research Institute Air Force Research Laboratory (AFRL) United States Air Force (USAF) STFC Rutherford Appleton Laboratory (RAL) Science and Technology Facilities Council (STFC) Imperial College London 2001 https://hal.science/hal-00316959 https://hal.science/hal-00316959/document https://hal.science/hal-00316959/file/angeo-19-1683-2001.pdf en eng HAL CCSD European Geosciences Union hal-00316959 https://hal.science/hal-00316959 https://hal.science/hal-00316959/document https://hal.science/hal-00316959/file/angeo-19-1683-2001.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316959 Annales Geophysicae, 2001, 19 (10/12), pp.1683-1696 [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 ftccsdartic 2023-10-21T23:07:59Z International audience On 7 December 2000, during 13:30?15:30 UT the MIRACLE all-sky camera at Ny Ålesund observed auroras at high-latitudes (MLAT ~ 76) simultaneously when the Cluster spacecraft were skimming the magnetopause in the same MLT sector (at ~ 16:00?18:00 MLT). The location of the auroras (near the ionospheric convection reversal boundary) and the clear correlation between their dynamics and IMF variations suggests their close relationship with R1 currents. Consequently, we can assume that the Cluster spacecraft were making observations in the magnetospheric region associated with the auroras, although exact magnetic conjugacy between the ground-based and satellite observations did not exist. The solar wind variations appeared to control both the behaviour of the auroras and the magnetopause dynamics. Auroral structures were observed at Ny Ålesund especially during periods of negative IMF B Z . In addition, the Cluster spacecraft experienced periodic ( T ~ 4 - 6 min) encounters between magnetospheric and magnetosheath plasmas. These undulations of the boundary can be interpreted as a consequence of tailward propagating magnetopause surface waves. Simultaneous dusk sector ground-based observations show weak, but discernible magnetic pulsations (Pc 5) and occasionally periodic variations ( T ~ 2 - 3 min) in the high-latitude auroras. In the dusk sector, Pc 5 activity was stronger and had characteristics that were consistent with a field line resonance type of activity. When IMF B Z stayed positive for a longer period, the auroras were dimmer and the spacecraft stayed at the outer edge of the magnetopause where they observed electromagnetic pulsations with T ~ 1 min. We find these observations interesting especially from the viewpoint of previously presented studies relating poleward-moving high-latitude auroras with pulsation activity and MHD waves propagating at the magnetospheric boundary layers. Article in Journal/Newspaper Ny Ålesund Ny-Ålesund Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Ny-Ålesund |
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 Kauristie, K. Pulkkinen, T. I. Amm, O. Viljanen, A. Syrjäsuo, M. Janhunen, P. Massetti, S. Orsini, S. Candidi, M. Watermann, J. Donovan, E. Prikryl, P. Mann, I. R. Eglitis, P. Smith, C. Denig, W. F. Opgenoorth, H. J. Lockwood, M. Dunlop, M. Vaivads, A. André, M. Ground-based and satellite observations of high-latitude auroral activity in the dusk sector of the auroral oval |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience On 7 December 2000, during 13:30?15:30 UT the MIRACLE all-sky camera at Ny Ålesund observed auroras at high-latitudes (MLAT ~ 76) simultaneously when the Cluster spacecraft were skimming the magnetopause in the same MLT sector (at ~ 16:00?18:00 MLT). The location of the auroras (near the ionospheric convection reversal boundary) and the clear correlation between their dynamics and IMF variations suggests their close relationship with R1 currents. Consequently, we can assume that the Cluster spacecraft were making observations in the magnetospheric region associated with the auroras, although exact magnetic conjugacy between the ground-based and satellite observations did not exist. The solar wind variations appeared to control both the behaviour of the auroras and the magnetopause dynamics. Auroral structures were observed at Ny Ålesund especially during periods of negative IMF B Z . In addition, the Cluster spacecraft experienced periodic ( T ~ 4 - 6 min) encounters between magnetospheric and magnetosheath plasmas. These undulations of the boundary can be interpreted as a consequence of tailward propagating magnetopause surface waves. Simultaneous dusk sector ground-based observations show weak, but discernible magnetic pulsations (Pc 5) and occasionally periodic variations ( T ~ 2 - 3 min) in the high-latitude auroras. In the dusk sector, Pc 5 activity was stronger and had characteristics that were consistent with a field line resonance type of activity. When IMF B Z stayed positive for a longer period, the auroras were dimmer and the spacecraft stayed at the outer edge of the magnetopause where they observed electromagnetic pulsations with T ~ 1 min. We find these observations interesting especially from the viewpoint of previously presented studies relating poleward-moving high-latitude auroras with pulsation activity and MHD waves propagating at the magnetospheric boundary layers. |
author2 |
Geophysical Research Division Helsinki Finnish Meteorological Institute (FMI) National Research Council of Italy Danish Meteorological Institute (DMI) University of Calgary Communications Research Centre Canada (CRC) University of York York, UK Swedish Institute of Space Physics Kiruna (IRF) Bartol Research Institute Air Force Research Laboratory (AFRL) United States Air Force (USAF) STFC Rutherford Appleton Laboratory (RAL) Science and Technology Facilities Council (STFC) Imperial College London |
format |
Article in Journal/Newspaper |
author |
Kauristie, K. Pulkkinen, T. I. Amm, O. Viljanen, A. Syrjäsuo, M. Janhunen, P. Massetti, S. Orsini, S. Candidi, M. Watermann, J. Donovan, E. Prikryl, P. Mann, I. R. Eglitis, P. Smith, C. Denig, W. F. Opgenoorth, H. J. Lockwood, M. Dunlop, M. Vaivads, A. André, M. |
author_facet |
Kauristie, K. Pulkkinen, T. I. Amm, O. Viljanen, A. Syrjäsuo, M. Janhunen, P. Massetti, S. Orsini, S. Candidi, M. Watermann, J. Donovan, E. Prikryl, P. Mann, I. R. Eglitis, P. Smith, C. Denig, W. F. Opgenoorth, H. J. Lockwood, M. Dunlop, M. Vaivads, A. André, M. |
author_sort |
Kauristie, K. |
title |
Ground-based and satellite observations of high-latitude auroral activity in the dusk sector of the auroral oval |
title_short |
Ground-based and satellite observations of high-latitude auroral activity in the dusk sector of the auroral oval |
title_full |
Ground-based and satellite observations of high-latitude auroral activity in the dusk sector of the auroral oval |
title_fullStr |
Ground-based and satellite observations of high-latitude auroral activity in the dusk sector of the auroral oval |
title_full_unstemmed |
Ground-based and satellite observations of high-latitude auroral activity in the dusk sector of the auroral oval |
title_sort |
ground-based and satellite observations of high-latitude auroral activity in the dusk sector of the auroral oval |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal.science/hal-00316959 https://hal.science/hal-00316959/document https://hal.science/hal-00316959/file/angeo-19-1683-2001.pdf |
geographic |
Ny-Ålesund |
geographic_facet |
Ny-Ålesund |
genre |
Ny Ålesund Ny-Ålesund |
genre_facet |
Ny Ålesund Ny-Ålesund |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316959 Annales Geophysicae, 2001, 19 (10/12), pp.1683-1696 |
op_relation |
hal-00316959 https://hal.science/hal-00316959 https://hal.science/hal-00316959/document https://hal.science/hal-00316959/file/angeo-19-1683-2001.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782338279287291904 |