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| Titel |
Global distributions of overlapping gravity waves in HIRDLS data |
| VerfasserIn |
C. J. Wright, S. M. Osprey, J. C. Gille |
| 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 ; 15, no. 14 ; Nr. 15, no. 14 (2015-07-30), S.8459-8477 |
| Datensatznummer |
250119938
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| Publikation (Nr.) |
 copernicus.org/acp-15-8459-2015.pdf |
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| Zusammenfassung |
| Data from the High Resolution Dynamics Limb Sounder (HIRDLS) instrument on
NASA's Aura satellite are used to investigate the relative numerical
variability of observed gravity wave packets as a function of both horizontal
and vertical wavenumber, with support from the Sounding of the Atmosphere
using Broadband Emission Radiometry (SABER) instrument on TIMED. We see that
these distributions are dominated by large vertical and small horizontal
wavenumbers, and have a similar spectral form at all heights and latitudes,
albeit with important differences. By dividing our observed wavenumber
distribution into particular subspecies of waves, we demonstrate that these
distributions exhibit significant temporal and spatial variability, and that
small-scale variability associated with particular geophysical phenomena such
as the monsoon arises due to variations in specific parts of the observed
spectrum. We further show that the well-known Andes/Antarctic Peninsula
gravity wave hotspot during southern winter, home to some of the largest wave
fluxes on the planet, is made up of relatively few waves, but with a
significantly increased flux per wave due to their spectral characteristics.
These results have implications for the modelling of gravity wave phenomena. |
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