Computer Science – Sound
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1413d&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 10, p. 1413-1416
Computer Science
Sound
3
Meteorology And Atmospheric Dynamics: Mesospheric Dynamics, Meteorology And Atmospheric Dynamics: Stratosphere/Troposphere Interactions, Meteorology And Atmospheric Dynamics: Waves And Tides, Atmospheric Composition And Structure: Middle Atmosphere-Energy Deposition
Scientific paper
The ratio R between the spectral kinetic and potential energies as a function of vertical wavenumber has been calculated from high-resolution data obtained with open stratospheric balloons near the Andes Mountains. Two segments of altitude in the troposphere and stratosphere respectively were analyzed. The ratio values are larger in both the troposphere and stratosphere than those predicted from the separability of wavenumber and frequency spectra. A comparison was made with previous statistical results from soundings over flat terrain extending up to logm(cy/m)=-2.0. Our calculations prolong this interval to -2.0<=logm<=-0.7. In the stratosphere, a remarkable similarity between that earlier work and ours is observed. This also happens in the troposphere, but only up to logm=-1.4. As suggested by the other authors, the enhanced R values might be explained by the propagation of inertial gravity waves generated in the mountain relief (this is supported by rotational spectra calculated here). Previous evidence in favor of spectral separability obtained by other authors has been extended here for larger wavenumbers by the observed constancy of the ratio between the temperature and vertical velocity spectra. In both the troposphere and the stratosphere, this ratio appears to be fairly uniform and similar to previous results obtained by other authors at lower resolution.
Alexander Paul
de la Torre Alejandro
Giraldez Alberto
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