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| Titel |
Parametrization of momentum and energy depositions from gravity waves generated by tropospheric hydrodynamic sources |
| VerfasserIn |
N. M. Gavrilov |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 15, no. 12 ; Nr. 15, no. 12, S.1570-1580 |
| Datensatznummer |
250013041
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| Publikation (Nr.) |
 copernicus.org/angeo-15-1570-1997.pdf |
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| Zusammenfassung |
| The mechanism of generation of internal
gravity waves (IGW) by mesoscale turbulence in the troposphere is considered.
The equations that describe the generation of waves by hydrodynamic sources of
momentum, heat and mass are derived. Calculations of amplitudes, wave energy
fluxes, turbulent viscosities, and accelerations of the mean flow caused by IGWs
generated in the troposphere are made. A comparison of different mechanisms of
turbulence production in the atmosphere by IGWs shows that the nonlinear
destruction of a primary IGW into a spectrum of secondary waves may provide
additional dissipation of nonsaturated stable waves. The mean wind increases
both the effectiveness of generation and dissipation of IGWs propagating in the
direction of the wind. Competition of both effects may lead to the dominance of
IGWs propagating upstream at long distances from tropospheric wave sources, and
to the formation of eastward wave accelerations in summer and westward
accelerations in winter near the mesopause. |
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