Abstract. Using observations with the ALOMAR SOUSY radar near Andenes (69.3°N, 16.0°E) from 1994 until 1997 polar mesosphere summer echoes (PMSE) have been investigated in dependence on geomagnetic K indices derived at the Auroral Observatory Tromsù (69.66°N, 18.94°E). During night-time and morning...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.371.7469 2023-05-15T13:25:14+02:00 J. Bremer T. L. Hansen The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.7469 http://hal.archives-ouvertes.fr/docs/00/31/65/70/PDF/angeo-18-202-2000.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.7469 http://hal.archives-ouvertes.fr/docs/00/31/65/70/PDF/angeo-18-202-2000.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal.archives-ouvertes.fr/docs/00/31/65/70/PDF/angeo-18-202-2000.pdf text ftciteseerx 2016-01-08T01:20:29Z Abstract. Using observations with the ALOMAR SOUSY radar near Andenes (69.3°N, 16.0°E) from 1994 until 1997 polar mesosphere summer echoes (PMSE) have been investigated in dependence on geomagnetic K indices derived at the Auroral Observatory Tromsù (69.66°N, 18.94°E). During night-time and morning hours a signi®cant correlation between the signal-to-noise ratio (SNR) of the radar results and the geomagnetic K indices could be detected with a maximum correlation near midnight. The correlation becomes markedly smaller in the afternoon and early evening hours with a minimum near 17 UT. This diurnal variation is in reasonable agreement with riometer absorption at Ivalo (68.55°N, 27.28°E) and can be explained by the diurnal variation of ionization due to precipitating high energetic particles. Therefore, a part of the diurnal PMSE variation is caused by this particle precipitation. The variability of the solar EUV variation, however, has no signi®cant in¯uence on the PMSE during the observation period. Text Andenes Unknown Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Ivalo ENVELOPE(27.543,27.543,68.651,68.651) |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
Abstract. Using observations with the ALOMAR SOUSY radar near Andenes (69.3°N, 16.0°E) from 1994 until 1997 polar mesosphere summer echoes (PMSE) have been investigated in dependence on geomagnetic K indices derived at the Auroral Observatory Tromsù (69.66°N, 18.94°E). During night-time and morning hours a signi®cant correlation between the signal-to-noise ratio (SNR) of the radar results and the geomagnetic K indices could be detected with a maximum correlation near midnight. The correlation becomes markedly smaller in the afternoon and early evening hours with a minimum near 17 UT. This diurnal variation is in reasonable agreement with riometer absorption at Ivalo (68.55°N, 27.28°E) and can be explained by the diurnal variation of ionization due to precipitating high energetic particles. Therefore, a part of the diurnal PMSE variation is caused by this particle precipitation. The variability of the solar EUV variation, however, has no signi®cant in¯uence on the PMSE during the observation period. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
J. Bremer T. L. Hansen |
spellingShingle |
J. Bremer T. L. Hansen |
author_facet |
J. Bremer T. L. Hansen |
author_sort |
J. Bremer |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.7469 http://hal.archives-ouvertes.fr/docs/00/31/65/70/PDF/angeo-18-202-2000.pdf |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) ENVELOPE(27.543,27.543,68.651,68.651) |
geographic |
Alomar Ivalo |
geographic_facet |
Alomar Ivalo |
genre |
Andenes |
genre_facet |
Andenes |
op_source |
http://hal.archives-ouvertes.fr/docs/00/31/65/70/PDF/angeo-18-202-2000.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.7469 http://hal.archives-ouvertes.fr/docs/00/31/65/70/PDF/angeo-18-202-2000.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766384273817862144 |