EISCAT Svalbard radar-derived atmospheric tidal features in the lower thermosphere as compared with the numerical modeling ATM2
The EISCAT Svalbard radar (ESR) has obtained neutral wind field data down to 90 km altitude in two period runs in August 1998. This has been rendered possible by successful elimination of ground clutter echoes by the ESR staff. Features of the obtained tidal components are then comparatively studied...
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National Institute of Polar Research
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ftnipr:oai:nipr.repo.nii.ac.jp:00006277 2023-05-15T16:04:30+02:00 EISCAT Svalbard radar-derived atmospheric tidal features in the lower thermosphere as compared with the numerical modeling ATM2 Takehiko Aso Anthony Van Eyken Phil J. S. Williams 1999-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6277 http://id.nii.ac.jp/1291/00006277/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6277&item_no=1&attribute_id=18&file_no=1 en eng National Institute of Polar Research EISCAT Scientific Association The Department of Physics, The University of Wales https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6277 http://id.nii.ac.jp/1291/00006277/ AA11397422 Advances in polar upper atmosphere research, 13, 48-56(1999-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6277&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1999 ftnipr 2023-03-18T20:23:29Z The EISCAT Svalbard radar (ESR) has obtained neutral wind field data down to 90 km altitude in two period runs in August 1998. This has been rendered possible by successful elimination of ground clutter echoes by the ESR staff. Features of the obtained tidal components are then comparatively studied with the ATM2 (Atmospheric Tidal Modeling Version 2) steady tidal model which assumes climatological background zonal flow. It is found that the results are fairly consistent with theoretical predictions that the diurnal component is almost evanescent with some indication of propagating characteristics, and that the semi-diurnal one is dominated by short vertical wavelength higher order mode prevalent at higher latitudes. The ter-diurnal component is also not in contradiction with non-linear interaction theory. Convincing delineation of these behaviors, however, awaits further study on the zonal wave number characteristics of relevant waves by longitudinal network collaborations. Report EISCAT Svalbard Advances in polar upper atmosphere research National Institute of Polar Research Repository, Japan Svalbard |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
description |
The EISCAT Svalbard radar (ESR) has obtained neutral wind field data down to 90 km altitude in two period runs in August 1998. This has been rendered possible by successful elimination of ground clutter echoes by the ESR staff. Features of the obtained tidal components are then comparatively studied with the ATM2 (Atmospheric Tidal Modeling Version 2) steady tidal model which assumes climatological background zonal flow. It is found that the results are fairly consistent with theoretical predictions that the diurnal component is almost evanescent with some indication of propagating characteristics, and that the semi-diurnal one is dominated by short vertical wavelength higher order mode prevalent at higher latitudes. The ter-diurnal component is also not in contradiction with non-linear interaction theory. Convincing delineation of these behaviors, however, awaits further study on the zonal wave number characteristics of relevant waves by longitudinal network collaborations. |
format |
Report |
author |
Takehiko Aso Anthony Van Eyken Phil J. S. Williams |
spellingShingle |
Takehiko Aso Anthony Van Eyken Phil J. S. Williams EISCAT Svalbard radar-derived atmospheric tidal features in the lower thermosphere as compared with the numerical modeling ATM2 |
author_facet |
Takehiko Aso Anthony Van Eyken Phil J. S. Williams |
author_sort |
Takehiko Aso |
title |
EISCAT Svalbard radar-derived atmospheric tidal features in the lower thermosphere as compared with the numerical modeling ATM2 |
title_short |
EISCAT Svalbard radar-derived atmospheric tidal features in the lower thermosphere as compared with the numerical modeling ATM2 |
title_full |
EISCAT Svalbard radar-derived atmospheric tidal features in the lower thermosphere as compared with the numerical modeling ATM2 |
title_fullStr |
EISCAT Svalbard radar-derived atmospheric tidal features in the lower thermosphere as compared with the numerical modeling ATM2 |
title_full_unstemmed |
EISCAT Svalbard radar-derived atmospheric tidal features in the lower thermosphere as compared with the numerical modeling ATM2 |
title_sort |
eiscat svalbard radar-derived atmospheric tidal features in the lower thermosphere as compared with the numerical modeling atm2 |
publisher |
National Institute of Polar Research |
publishDate |
1999 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6277 http://id.nii.ac.jp/1291/00006277/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6277&item_no=1&attribute_id=18&file_no=1 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard Advances in polar upper atmosphere research |
genre_facet |
EISCAT Svalbard Advances in polar upper atmosphere research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6277 http://id.nii.ac.jp/1291/00006277/ AA11397422 Advances in polar upper atmosphere research, 13, 48-56(1999-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6277&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766400083726696448 |