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  • Alexander, M. J., J. R. Holton, and D. R. Durran, 1995: The gravity wave response above deep convection in a squall line simulation. J. Atmos. Sci.,52, 2212–2226.

  • Andrews, D. G., J. R. Holton, and C. B. Leovy, 1987: Middle Atmosphere Dynamics. Academic Press, 489 pp.

  • Bergman, J. W., and M. L. Salby, 1994: Equatorial wave activity derived from fluctuations in observed convection. J. Atmos. Sci.,51, 3791–3806.

  • Bretherton, C., 1988: Group velocity and the linear response of stratified fluids to internal heat or mass sources. J. Atmos. Sci.,45, 81–93.

  • Crook, N. A., 1988: Trapping of low-level internal gravity waves. J. Atmos. Sci.,45, 1533–1541.

  • Dewan, E. M., and Coauthors, 1998: MSX satellite observations of thunderstorm-generated gravity waves in mid-wave infrared images of the upper stratosphere. Geophys. Res. Lett.,25, 939–942.

  • Durran, D. R., and J. B. Klemp, 1982: On the effects of moisture on the Brunt–Väisälä frequency. J. Atmos. Sci.,39, 2152–2158.

  • Edmon, H. J., Jr., B. J. Hoskins, and M. E. McIntyre, 1980: Eliassen–Palm cross sections for the troposphere. J. Atmos. Sci.,37, 2600–2616.

  • Fovell, R. G., and P. S. Dailey, 1995: The temporal behavior of numerically simulated multicell-type storms. Part I: Modes of behavior. J. Atmos. Sci.,52, 2073–2095.

  • ——, D. R. Durran, and J. R. Holton, 1992: Numerical simulations of convectively generated stratospheric gravity waves. J. Atmos. Sci.,49, 1427–1442.

  • Gage, K. S., and B. B. Balsley, 1984: MST radar studies of wind and turbulence in the middle atmosphere. J. Atmos. Terr. Phys.,46, 739–753.

  • Garcia, R. R., and M. L. Salby, 1987: Transient response to localized episodic heating in the Tropics. Part II: Far-field behavior. J. Atmos. Sci.,44, 498–530.

  • Holton, J. R., 1973: On the frequency distribution of atmospheric Kelvin waves. J. Atmos. Sci.,30, 499–501.

  • ——, 1992: An Introduction to Dynamic Meteorology. Academic Press, 507 pp.

  • Klemp, J. B., and D. R. Durran, 1983: An upper boundary condition permitting internal gravity wave radiation in numerical mesoscale models. Mon. Wea. Rev.,111, 430–444.

  • Larsen, M. F., W. E. Swartz, and R. F. Woodman, 1982: Gravity-wave generation by thunder storms observed with a vertically-pointing 430 MHz radar. Geophys. Res. Lett.,9, 571–574.

  • Lilly, D. K., 1962: On the numerical simulation of buoyant convection. Tellus,14, 148–172.

  • Lin, Y. L., and R. B. Smith, 1986: Transient dynamics of airflow near a local heat source. J. Atmos. Sci.,43, 40–49.

  • Manzini, E., and K. Hamilton, 1993: Middle atmosphere traveling waves forced by convective heating. J. Atmos. Sci.,50, 2180–2200.

  • Mapes, B. E., 1993: Gregarious tropical convection. J. Atmos. Sci.,50, 2026–2037.

  • Nicholls, M. E., R. A. Pielke Sr., and W. R. Cotton, 1991: Thermally forced gravity waves in an atmosphere at rest. J. Atmos. Sci.,48, 1869–1884.

  • Pandya, R. E., and D. R. Durran, 1996: The influence of convectively generated thermal forcing on the mesoscale circulation around squall lines. J. Atmos. Sci.,53, 2924–2951.

  • ——, ——, and C. Bretherton, 1993: Comments on “Thermally forced gravity waves in an atmosphere at rest.” J. Atmos. Sci.,50, 4098–4101.

  • Percival, D. B., and A. T. Walden, 1993: Spectral Analysis for Physical Applications: Multitaper and Conventional Univariate Techniques. University Press, 702 pp.

  • Salby, M. L., and R. R. Garcia, 1987: Transient response to localized episodic heating in the Tropics. Part I: Excitation and short-time near-field behavior. J. Atmos. Sci.,44, 458–498.

  • Sato, K., 1993: Small-scale wind disturbances observed by the MU radar during the passage of Typhoon Kelly. J. Atmos. Sci.,50, 518–537.

  • Simpson, J., C. Kummerow, W.-K. Tao, and R. F. Adler, 1996: On the Tropical Rainfall Measuring Mission (TRMM). Meteor. Atmos. Phys.,60, 19–36.

  • Weisman, M. L., J. B. Klemp, and R. Rotunno, 1988: Structure and evolution of numerically simulated squall lines. J. Atmos. Sci.,45, 1990–2013.

  • Yang, M.-J., and R. A. Houze Jr., 1995: Multicell squall-line structure as a manifestation of vertically trapped gravity waves. Mon. Wea. Rev.,123, 641–661.

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Article
Article Type:
Research Article

Linear Stratospheric Gravity Waves above Convective Thermal Forcing

Rajul E. PandyaNational Center for Atmospheric Research, Boulder, Colorado*

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M. Joan AlexanderDepartment of Atmospheric Sciences, University of Washington, Seattle, Washington

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Print Publication:
01 Jul 1999
DOI:
https://doi.org/10.1175/1520-0469(1999)056<2434:LSGWAC>2.0.CO;2
Page(s):
2434–2446
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Abstract

The spectra of linear gravity waves generated by a time-varying tropospheric thermal forcing representing organized convection are compared to the spectra of stratospheric gravity waves generated by organized convection in a fully nonlinear two-dimensional squall line simulation. The resemblance between the spectra in the two simulations suggests that stratospheric gravity waves above convection can be understood primarily in terms of the linear response to a time- and space-dependent thermal forcing. In particular, the linear response to thermal forcing accounts for the correlation between the dominant vertical wavelength of the stratospheric waves and the depth of the tropospheric convection as well as the the fact that the dominant frequency of the stratospheric waves is the same as the frequency of oscillation of the main convective updraft.

Corresponding author address: Rajul Pandya, NCAR, P.O. Box 3000, Boulder, CO 80307-3000.

Email: pandya@ncar.ucar.edu

Abstract

The spectra of linear gravity waves generated by a time-varying tropospheric thermal forcing representing organized convection are compared to the spectra of stratospheric gravity waves generated by organized convection in a fully nonlinear two-dimensional squall line simulation. The resemblance between the spectra in the two simulations suggests that stratospheric gravity waves above convection can be understood primarily in terms of the linear response to a time- and space-dependent thermal forcing. In particular, the linear response to thermal forcing accounts for the correlation between the dominant vertical wavelength of the stratospheric waves and the depth of the tropospheric convection as well as the the fact that the dominant frequency of the stratospheric waves is the same as the frequency of oscillation of the main convective updraft.

Corresponding author address: Rajul Pandya, NCAR, P.O. Box 3000, Boulder, CO 80307-3000.

Email: pandya@ncar.ucar.edu

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