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| Titel |
Investigation of a mesospheric bore event over northern China |
| VerfasserIn |
Q. Li, J. Xu, J. Yue, X. Liu, W. Yuan, B. Ning, S. Guan, J. P. Younger |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 31, no. 3 ; Nr. 31, no. 3 (2013-03-05), S.409-418 |
| Datensatznummer |
250019002
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| Publikation (Nr.) |
 copernicus.org/angeo-31-409-2013.pdf |
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| Zusammenfassung |
| A mesospheric bore event was observed using an OH all-sky airglow imager
(ASAI) at Xinglong (40.2° N, 117.4° E), in
northern China, on the night of 8–9 January 2011. Simultaneous
observations by a Doppler meteor radar, a broadband sodium lidar, and
TIMED/SABER OH intensity and temperature measurements are used to
investigate the characteristics and environment of the bore propagation and
the possible relations with the Na density perturbations. The bore
propagated from northeast to southwest and divided the sky into bright and
dark halves. The calculations show that the bore has an average phase
velocity of 68 m s−1. The crests following the bore have a horizontal
wavelength of ~ 22 km. These parameters are consistent with
the hydraulic jump theory proposed by Dewan and Picard, as well as the
previous bore reports. Simultaneous wind measurements from the Doppler
meteor radar at Shisanling (40.3° N, 116.2° E)
and temperature data from SABER on board the TIMED satellite are used to
characterize the propagating environment of the bore. The result shows that
a thermal-Doppler duct exists near the OH layer that supports the horizontal
propagation of the bore. Simultaneous Na lidar observations at Yanqing
(40.4° N, 116.0° E) suggest that there is a downward
displacement of Na density during the passage of the mesospheric bore event. |
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