Gravity wave signatures at mesopause heights
The ALOMAR SOUSY Radar operated at 53.5 MHz has been used in a five-beam configuration to study dynamical processes at gravity wave periods in the summer polar mesosphere. A case study of a gravity wave with a period of about 9 min is presented and analysed in some detail. The three-dimensional...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
1996-11-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/14/1186/1996/angeo-14-1186-1996.pdf |
| _version_ | 1818554242449801216 |
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| author | R. Rüster P. Czechowsky P. Hoffmann W. Singer |
| author_facet | R. Rüster P. Czechowsky P. Hoffmann W. Singer |
| author_sort | R. Rüster |
| collection | DOAJ |
| description | The ALOMAR SOUSY Radar operated at 53.5 MHz
has been used in a five-beam configuration to study dynamical processes at
gravity wave periods in the summer polar mesosphere. A case study of a gravity
wave with a period of about 9 min is presented and analysed in some detail. The
three-dimensional wave number vector is determined from the phase information of
the 9-min velocity oscillations obtained in all beam directions and all range
gates. The horizontal wavelengths in the north and east direction are estimated
to be about 60 and 50 km, respectively. The echo power variations,
simultaneously observed at different beam pointing positions, are investigated
using cross-correlation analysis. The results show that these wave-associated
variations lead to horizontal and vertical deformation of the echoing layers.
The horizontal wavelength in the north-south direction, derived from the echo
power modification, is in good agreement with the one obtained from the velocity
analysis. |
| first_indexed | 2024-12-12T09:36:47Z |
| format | Article |
| id | doaj.art-4eefb02e708c4177b9a2429afedb81d8 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-12T09:36:47Z |
| publishDate | 1996-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-4eefb02e708c4177b9a2429afedb81d82022-12-22T00:28:41ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05761996-11-01141186119110.1007/s00585-996-1186-0Gravity wave signatures at mesopause heightsR. Rüster0P. Czechowsky1P. Hoffmann2W. Singer3Max-Planck-Institut für Aeronomie, Postfach 20, 37189 Katlenburg-Lindau, GermanyMax-Planck-Institut für Aeronomie, Postfach 20, 37189 Katlenburg-Lindau, GermanyInstitut für Atmosphärenphysik der Universität Rostock, Schloßstraße 4-6, 18225 Kühlungsborn, GermanyInstitut für Atmosphärenphysik der Universität Rostock, Schloßstraße 4-6, 18225 Kühlungsborn, GermanyThe ALOMAR SOUSY Radar operated at 53.5 MHz has been used in a five-beam configuration to study dynamical processes at gravity wave periods in the summer polar mesosphere. A case study of a gravity wave with a period of about 9 min is presented and analysed in some detail. The three-dimensional wave number vector is determined from the phase information of the 9-min velocity oscillations obtained in all beam directions and all range gates. The horizontal wavelengths in the north and east direction are estimated to be about 60 and 50 km, respectively. The echo power variations, simultaneously observed at different beam pointing positions, are investigated using cross-correlation analysis. The results show that these wave-associated variations lead to horizontal and vertical deformation of the echoing layers. The horizontal wavelength in the north-south direction, derived from the echo power modification, is in good agreement with the one obtained from the velocity analysis.https://www.ann-geophys.net/14/1186/1996/angeo-14-1186-1996.pdf |
| spellingShingle | R. Rüster P. Czechowsky P. Hoffmann W. Singer Gravity wave signatures at mesopause heights Annales Geophysicae |
| title | Gravity wave signatures at mesopause heights |
| title_full | Gravity wave signatures at mesopause heights |
| title_fullStr | Gravity wave signatures at mesopause heights |
| title_full_unstemmed | Gravity wave signatures at mesopause heights |
| title_short | Gravity wave signatures at mesopause heights |
| title_sort | gravity wave signatures at mesopause heights |
| url | https://www.ann-geophys.net/14/1186/1996/angeo-14-1186-1996.pdf |
| work_keys_str_mv | AT rruster gravitywavesignaturesatmesopauseheights AT pczechowsky gravitywavesignaturesatmesopauseheights AT phoffmann gravitywavesignaturesatmesopauseheights AT wsinger gravitywavesignaturesatmesopauseheights |