The association of polar mesosphere summer echo layers with tidal modes
The occurrence of PMSEs with time of day shows a semi-diurnal variation with minima at 8 and 20 h LT. PMSE layers observed for more than 30 min show an average rate of descent of 2 km h−1. These characteristics suggest the influence of tidal winds. When the observed steady wind and diurnal and semi-...
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ftnerc:oai:nora.nerc.ac.uk:515899 2023-05-15T16:04:39+02:00 The association of polar mesosphere summer echo layers with tidal modes Williams, P. J. S. Jones, G. O. L. Palmer, J. R. Rishbeth, H. 1995 http://nora.nerc.ac.uk/id/eprint/515899/ https://doi.org/10.1007/s00585-995-0454-8 unknown Springer Williams, P. J. S.; Jones, G. O. L.; Palmer, J. R.; Rishbeth, H. 1995 The association of polar mesosphere summer echo layers with tidal modes. Annales Geophysicae, 13 (4). 454-457. https://doi.org/10.1007/s00585-995-0454-8 <https://doi.org/10.1007/s00585-995-0454-8> Publication - Article PeerReviewed 1995 ftnerc https://doi.org/10.1007/s00585-995-0454-8 2023-02-04T19:44:17Z The occurrence of PMSEs with time of day shows a semi-diurnal variation with minima at 8 and 20 h LT. PMSE layers observed for more than 30 min show an average rate of descent of 2 km h−1. These characteristics suggest the influence of tidal winds. When the observed steady wind and diurnal and semi-diurnal tides at EISCAT are added, the overall magnitude shows a time-variation which matches the occurrence of PMSEs, and the observed rate of descent, approximately 2 km h−1. Atmospheric gravity waves also contribute to the velocity of the neutral wind. When the wave reinforces the background wind, the PMSEs are stronger and descend more rapidly, but when the wave-related velocity opposes the background wind the PMSE is weaker and it descends more slowly. Article in Journal/Newspaper EISCAT Natural Environment Research Council: NERC Open Research Archive Annales Geophysicae 13 4 454 457 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
The occurrence of PMSEs with time of day shows a semi-diurnal variation with minima at 8 and 20 h LT. PMSE layers observed for more than 30 min show an average rate of descent of 2 km h−1. These characteristics suggest the influence of tidal winds. When the observed steady wind and diurnal and semi-diurnal tides at EISCAT are added, the overall magnitude shows a time-variation which matches the occurrence of PMSEs, and the observed rate of descent, approximately 2 km h−1. Atmospheric gravity waves also contribute to the velocity of the neutral wind. When the wave reinforces the background wind, the PMSEs are stronger and descend more rapidly, but when the wave-related velocity opposes the background wind the PMSE is weaker and it descends more slowly. |
format |
Article in Journal/Newspaper |
author |
Williams, P. J. S. Jones, G. O. L. Palmer, J. R. Rishbeth, H. |
spellingShingle |
Williams, P. J. S. Jones, G. O. L. Palmer, J. R. Rishbeth, H. The association of polar mesosphere summer echo layers with tidal modes |
author_facet |
Williams, P. J. S. Jones, G. O. L. Palmer, J. R. Rishbeth, H. |
author_sort |
Williams, P. J. S. |
title |
The association of polar mesosphere summer echo layers with tidal modes |
title_short |
The association of polar mesosphere summer echo layers with tidal modes |
title_full |
The association of polar mesosphere summer echo layers with tidal modes |
title_fullStr |
The association of polar mesosphere summer echo layers with tidal modes |
title_full_unstemmed |
The association of polar mesosphere summer echo layers with tidal modes |
title_sort |
association of polar mesosphere summer echo layers with tidal modes |
publisher |
Springer |
publishDate |
1995 |
url |
http://nora.nerc.ac.uk/id/eprint/515899/ https://doi.org/10.1007/s00585-995-0454-8 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_relation |
Williams, P. J. S.; Jones, G. O. L.; Palmer, J. R.; Rishbeth, H. 1995 The association of polar mesosphere summer echo layers with tidal modes. Annales Geophysicae, 13 (4). 454-457. https://doi.org/10.1007/s00585-995-0454-8 <https://doi.org/10.1007/s00585-995-0454-8> |
op_doi |
https://doi.org/10.1007/s00585-995-0454-8 |
container_title |
Annales Geophysicae |
container_volume |
13 |
container_issue |
4 |
container_start_page |
454 |
op_container_end_page |
457 |
_version_ |
1766400266761928704 |