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| Titel |
Characteristics and sources of gravity waves observed in noctilucent cloud over Norway |
| VerfasserIn |
T. D. Demissie, P. J. Espy, N. H. Kleinknecht, M. Hatlen, N. Kaifler, G. Baumgarten |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 22 ; Nr. 14, no. 22 (2014-11-18), S.12133-12142 |
| Datensatznummer |
250119169
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| Publikation (Nr.) |
 copernicus.org/acp-14-12133-2014.pdf |
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| Zusammenfassung |
| Four years of noctilucent cloud (NLC) images from an automated digital
camera in Trondheim and results from a ray-tracing model are used to extend
the climatology of gravity waves to higher latitudes and to identify their
sources during summertime. The climatology of the summertime gravity waves
detected in NLC between 64 and 74° N is similar to that
observed between 60 and 64° N by Pautet et al. (2011).
The direction of propagation of gravity waves observed in the NLC north of
64° N is a continuation of the north and northeast propagation as
observed in south of 64° N. However, a unique population of fast,
short wavelength waves propagating towards the SW is observed in the NLC,
which is consistent with transverse instabilities generated in situ by breaking
gravity waves (Fritts and Alexander, 2003). The relative amplitude of the waves
observed in the NLC Mie scatter have been combined with ray-tracing results
to show that waves propagating from near the tropopause, rather than those
resulting from secondary generation in the stratosphere or mesosphere, are
more likely to be the sources of the prominent wave structures observed in
the NLC. The coastal region of Norway along the latitude of 70° N
is identified as the primary source region of the waves generated near the
tropopause. |
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