%0 Journal Article %1 p00420 %A Sica, RJ %A Russell, AT %D 1999 %J Geophysical Research Letters %K imported sica %N 24 %P 3617�3620 %T How many waves are in the gravity wave spectrum? %V 26 %X Parametric modelling of density perturbation measurements obtained with the University of Western Ontario's Purple Crow Lidar on 5 nights are used to infer that the typical vertical wavenumber spectrum in the upper stratosphere is dominated by a few quasi-monochromatic waves. In general only 2 of these waves, with growth or decay rates on the order of 1/(14 km) or less, carry most of the spectral energy. These waves are present about half the time on the nights studied. When analyzed using classical spectral techniques these waves appear to form a continuous spectrum. These results may help explain why general circulation models obtain reasonable climatologies when gravity wave parameterization schemes based on a small number of propagating gravity waves are employed.

@article{p00420, abstract = {Parametric modelling of density perturbation measurements obtained with the University of Western Ontario's Purple Crow Lidar on 5 nights are used to infer that the typical vertical wavenumber spectrum in the upper stratosphere is dominated by a few quasi-monochromatic waves. In general only 2 of these waves, with growth or decay rates on the order of 1/(14 km) or less, carry most of the spectral energy. These waves are present about half the time on the nights studied. When analyzed using classical spectral techniques these waves appear to form a continuous spectrum. These results may help explain why general circulation models obtain reasonable climatologies when gravity wave parameterization schemes based on a small number of propagating gravity waves are employed.}, added-at = {2019-04-05T21:27:46.000+0200}, author = {Sica, RJ and Russell, AT}, biburl = {https://www.bibsonomy.org/bibtex/25872c4a3f7e21a52b2cab9dcded026d9/bobsica}, interhash = {53141d10c760567621405fb789b1206c}, intrahash = {5872c4a3f7e21a52b2cab9dcded026d9}, journal = {Geophysical Research Letters}, keywords = {imported sica}, location = {Univ Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, Canada}, number = 24, pages = {3617�3620}, timestamp = {2019-04-05T21:27:46.000+0200}, title = {How many waves are in the gravity wave spectrum?}, volume = 26, year = 1999 }