Long-term variation of thunderstorm activity over the amazon basin during southern summer as derived from atmospheric noise measurements

Schäning, B.

doi:10.1016/0021-9169(92)90042-j

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…In the case of other tropospheric sources of IGWs, a good correlation is noticed between IGW intensity in the atmosphere and the passage of atmospheric fronts (Brodhun et al, 1974;Nagpal, 1979;Kersley and Rees, 1982;Einaudi et al, 1978;Ley and Peltier, 1978). IGWs with periods of 5±20 min and horizontal phase velocities of 10±70 m s À1 may appear at the upper edge of thunderstorms and heavy cumulus clouds (Grachev et al, 1984;Kazimirovsky, 1983;Schaning, 1992). Also among the IGW sources are convection (Townsend, 1966;Fovell et al, 1992;Manzini and Hamilton, 1993;P®ster et al, 1993a), industrial explosions (Varshavskiy and Kalikhman, 1984), disturbances due to space vehicles (Kulikov et al, 1982;Jacobson and Carlos, 1994), passage of solar terminator (Somsikov, 1995), earthquakes (Samarjiev andPashova, 1982), volcanos (Roberts et al, 1982), sea choppiness (Golitsyn et al, 1976), cyclones and typhoons (Huang et al, 1985;P®ster et al, 1993b), and moving disturbances in the atmosphere (Grigoriev and Savina, 1983;Lipovskiy, 1981), etc.…”

Section: Introductionmentioning

confidence: 99%

Parametrization of momentum and energy depositions from gravity waves generated by tropospheric hydrodynamic sources

Гаврилов

1997

Ann. Geophys.

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Abstract. 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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Section: Introductionmentioning

confidence: 99%

Parametrization of momentum and energy depositions from gravity waves generated by tropospheric hydrodynamic sources

Гаврилов

1997

Ann. Geophys.

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show abstract

“…In the case of other tropospheric sources of IGWs, a good correlation is noticed between IGW intensity in the atmosphere and the passage of atmospheric fronts (Brodhun et al, 1974;Nagpal, 1979;Kersley and Rees, 1982;Einaudi et al, 1978;Ley and Peltier, 1978). IGWs with periods of 5±20 min and horizontal phase velocities of 10±70 m s À1 may appear at the upper edge of thunderstorms and heavy cumulus clouds (Grachev et al, 1984;Kazimirovsky, 1983;Schaning, 1992). Also among the IGW sources are convection (Townsend, 1966;Fovell et al, 1992;Manzini and Hamilton, 1993;P®ster et al, 1993a), industrial explosions (Varshavskiy and Kalikhman, 1984), disturbances due to space vehicles (Kulikov et al, 1982;Jacobson and Carlos, 1994), passage of solar terminator (Somsikov, 1995), earthquakes (Samarjiev and Pashova, 1982), volcanos (Roberts et al, 1982), sea choppiness (Golitsyn et al, 1976), cyclones and typhoons (Huang et al, 1985;P®ster et al, 1993b), and moving disturbances in the atmosphere (Grigoriev and Savina, 1983;Lipovskiy, 1981), etc.…”

Section: Introductionmentioning

confidence: 99%

Parametrization of momentum and energy depositions from gravity waves generated by tropospheric hydrodynamic sources

Gavrilov¹

1997

Ann Geophysicae

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Abstract. 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¯uxes, turbulent viscosities, and accelerations of the mean¯ow caused by IGWs generated in the troposphere are made. A comparison of dierent 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 eectiveness of generation and dissipation of IGWs propagating in the direction of the wind. Competition of both eects 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.

show abstract

Long-term variation of thunderstorm activity over the amazon basin during southern summer as derived from atmospheric noise measurements

Cited by 2 publications

References 16 publications

Parametrization of momentum and energy depositions from gravity waves generated by tropospheric hydrodynamic sources

Parametrization of momentum and energy depositions from gravity waves generated by tropospheric hydrodynamic sources

Parametrization of momentum and energy depositions from gravity waves generated by tropospheric hydrodynamic sources

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