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| Titel |
Analysis of internal gravity waves with GPS RO density profiles |
| VerfasserIn |
P. Šácha, U. Foelsche, P. Pisoft |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 12 ; Nr. 7, no. 12 (2014-12-03), S.4123-4132 |
| Datensatznummer |
250115975
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| Publikation (Nr.) |
 copernicus.org/amt-7-4123-2014.pdf |
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| Zusammenfassung |
| GPS radio occultation (RO) data have proved to be a great tool for
atmospheric monitoring and studies. In the past decade, they were frequently
used for analyses of the internal gravity waves in the upper troposphere and
lower stratosphere region. Atmospheric density is the first quantity of state
gained in the retrieval process and is not burdened by additional
assumptions. However, there are no studies elaborating in detail the
utilization of GPS RO density profiles for gravity wave analyses. In this
paper, we introduce a method for density background separation and a
methodology for internal gravity wave analysis using the density profiles.
Various background choices are discussed and the correspondence between
analytical forms of the density and temperature background profiles is
examined. In the stratosphere, a comparison between the power spectrum of
normalized density and normalized dry temperature fluctuations confirms the
suitability of the density profiles' utilization. In the height range of
8–40 km, results of the continuous wavelet transform are presented and
discussed. Finally, the limits of our approach are discussed and the
advantages of the density usage are listed. |
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