Simultaneous optical and radar signatures of poleward-moving auroral forms
Dayside poleward moving auroral forms (PMAFs) were detected between 06:30 and 07:00 UT on December 16, 1998, by the meridian scanning photometer and the all-sky camera at Ny Ålesund, Svalbard. Simultaneous SuperDARN HF radar measurements permitted the study of the associated ionospheric velocity pat...
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European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany)
2015
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Online Access: | http://www.ann-geophys.net/18/1054/2000/angeo-18-1054-2000.html http://hdl.handle.net/2381/31900 https://doi.org/10.1007/s00585-000-1054-2 |
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ftleicester:oai:lra.le.ac.uk:2381/31900 2023-05-15T16:04:46+02:00 Simultaneous optical and radar signatures of poleward-moving auroral forms Thorolfsson, A. Cerisier, J. C. Lockwood, M. Sandholt, P. E. Senior, C. Lester, Mark 2015-03-19T13:50:18Z http://www.ann-geophys.net/18/1054/2000/angeo-18-1054-2000.html http://hdl.handle.net/2381/31900 https://doi.org/10.1007/s00585-000-1054-2 en eng European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany) ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, 2000, 18 (9), pp. 1054-1066 (13) 0992-7689 http://www.ann-geophys.net/18/1054/2000/angeo-18-1054-2000.html http://hdl.handle.net/2381/31900 doi:10.1007/s00585-000-1054-2 1432-0576 Archived with reference to SHERPA/RoMEO and publisher website. © European Geosciences Union 2000. Version of record: http://www.ann-geophys.net/18/1054/2000/angeo-18-1054-2000.html Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere auroral ionosphere plasma convection magnetospheric physics magnetopause cusp and boundary layers FLUX-TRANSFER EVENTS MAGNETOSPHERE-IONOSPHERE SYSTEM MAGNETIC-FIELD ORIENTATION BOUNDARY-LAYER CAMPAIGN MULTIPLE BRIGHTENINGS DAYSIDE MAGNETOPAUSE ENHANCED CONVECTION HF-RADAR CUSP RECONNECTION Conference Paper 2015 ftleicester https://doi.org/10.1007/s00585-000-1054-2 2019-03-22T20:20:10Z Dayside poleward moving auroral forms (PMAFs) were detected between 06:30 and 07:00 UT on December 16, 1998, by the meridian scanning photometer and the all-sky camera at Ny Ålesund, Svalbard. Simultaneous SuperDARN HF radar measurements permitted the study of the associated ionospheric velocity pattern. A good general agreement is observed between the location and movement of velocity enhancements (flow channels) and the PMAFs. Clear signatures of equatorward flow were detected in the vicinity of PMAFs. This flow is believed to be the signature of a return flow outside the reconnected flux tube, as predicted by the Southwood model. The simulated signatures of this model reproduce globally the measured signatures, and differences with the experimental data can be explained by the simplifications of the model. Proposed schemes of the flow modification due to the presence of several flow channels and the modification of cusp and region 1 field-aligned currents at the time of sporadic reconnection events are shown to fit well with the observations. Peer-reviewed Publisher Version 9th International EISCAT Workshop, WERNIGERODE, GERMANY Conference Object EISCAT Ny Ålesund Ny-Ålesund Svalbard University of Leicester: Leicester Research Archive (LRA) Ny-Ålesund Svalbard Annales Geophysicae 18 9 1054 1066 |
institution |
Open Polar |
collection |
University of Leicester: Leicester Research Archive (LRA) |
op_collection_id |
ftleicester |
language |
English |
topic |
Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere auroral ionosphere plasma convection magnetospheric physics magnetopause cusp and boundary layers FLUX-TRANSFER EVENTS MAGNETOSPHERE-IONOSPHERE SYSTEM MAGNETIC-FIELD ORIENTATION BOUNDARY-LAYER CAMPAIGN MULTIPLE BRIGHTENINGS DAYSIDE MAGNETOPAUSE ENHANCED CONVECTION HF-RADAR CUSP RECONNECTION |
spellingShingle |
Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere auroral ionosphere plasma convection magnetospheric physics magnetopause cusp and boundary layers FLUX-TRANSFER EVENTS MAGNETOSPHERE-IONOSPHERE SYSTEM MAGNETIC-FIELD ORIENTATION BOUNDARY-LAYER CAMPAIGN MULTIPLE BRIGHTENINGS DAYSIDE MAGNETOPAUSE ENHANCED CONVECTION HF-RADAR CUSP RECONNECTION Thorolfsson, A. Cerisier, J. C. Lockwood, M. Sandholt, P. E. Senior, C. Lester, Mark Simultaneous optical and radar signatures of poleward-moving auroral forms |
topic_facet |
Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere auroral ionosphere plasma convection magnetospheric physics magnetopause cusp and boundary layers FLUX-TRANSFER EVENTS MAGNETOSPHERE-IONOSPHERE SYSTEM MAGNETIC-FIELD ORIENTATION BOUNDARY-LAYER CAMPAIGN MULTIPLE BRIGHTENINGS DAYSIDE MAGNETOPAUSE ENHANCED CONVECTION HF-RADAR CUSP RECONNECTION |
description |
Dayside poleward moving auroral forms (PMAFs) were detected between 06:30 and 07:00 UT on December 16, 1998, by the meridian scanning photometer and the all-sky camera at Ny Ålesund, Svalbard. Simultaneous SuperDARN HF radar measurements permitted the study of the associated ionospheric velocity pattern. A good general agreement is observed between the location and movement of velocity enhancements (flow channels) and the PMAFs. Clear signatures of equatorward flow were detected in the vicinity of PMAFs. This flow is believed to be the signature of a return flow outside the reconnected flux tube, as predicted by the Southwood model. The simulated signatures of this model reproduce globally the measured signatures, and differences with the experimental data can be explained by the simplifications of the model. Proposed schemes of the flow modification due to the presence of several flow channels and the modification of cusp and region 1 field-aligned currents at the time of sporadic reconnection events are shown to fit well with the observations. Peer-reviewed Publisher Version 9th International EISCAT Workshop, WERNIGERODE, GERMANY |
format |
Conference Object |
author |
Thorolfsson, A. Cerisier, J. C. Lockwood, M. Sandholt, P. E. Senior, C. Lester, Mark |
author_facet |
Thorolfsson, A. Cerisier, J. C. Lockwood, M. Sandholt, P. E. Senior, C. Lester, Mark |
author_sort |
Thorolfsson, A. |
title |
Simultaneous optical and radar signatures of poleward-moving auroral forms |
title_short |
Simultaneous optical and radar signatures of poleward-moving auroral forms |
title_full |
Simultaneous optical and radar signatures of poleward-moving auroral forms |
title_fullStr |
Simultaneous optical and radar signatures of poleward-moving auroral forms |
title_full_unstemmed |
Simultaneous optical and radar signatures of poleward-moving auroral forms |
title_sort |
simultaneous optical and radar signatures of poleward-moving auroral forms |
publisher |
European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany) |
publishDate |
2015 |
url |
http://www.ann-geophys.net/18/1054/2000/angeo-18-1054-2000.html http://hdl.handle.net/2381/31900 https://doi.org/10.1007/s00585-000-1054-2 |
geographic |
Ny-Ålesund Svalbard |
geographic_facet |
Ny-Ålesund Svalbard |
genre |
EISCAT Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
EISCAT Ny Ålesund Ny-Ålesund Svalbard |
op_relation |
ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, 2000, 18 (9), pp. 1054-1066 (13) 0992-7689 http://www.ann-geophys.net/18/1054/2000/angeo-18-1054-2000.html http://hdl.handle.net/2381/31900 doi:10.1007/s00585-000-1054-2 1432-0576 |
op_rights |
Archived with reference to SHERPA/RoMEO and publisher website. © European Geosciences Union 2000. Version of record: http://www.ann-geophys.net/18/1054/2000/angeo-18-1054-2000.html |
op_doi |
https://doi.org/10.1007/s00585-000-1054-2 |
container_title |
Annales Geophysicae |
container_volume |
18 |
container_issue |
9 |
container_start_page |
1054 |
op_container_end_page |
1066 |
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1766400395796545536 |