Boundary-Layer Meteorology

, Volume 66, Issue 1–2, pp 1–17 | Cite as

Internal atmospheric gravity waves near the coast of Antarctica

  • J. Egger
  • C. Wamser
  • C. Kottmeier
Article

Abstract

Two gravity wave events as observed at Georg von Neumayer Station in Antarctica are described and analyzed. Wind and temperature are recorded at a meteorological tower. Surface pressure time series are available from four sites so that rather exact evaluations of phase speed and wavelength are possible. Radiosonde ascents provide information on the structure of the atmosphere above the boundary layer.

The pressure traces of both events are dominated by sinusoidal oscillations with a well defined frequency. Related variations of wind and temperature are small during the first event (16 July 1986) as are those of temperature on 29 September 1986. However, wind oscillations are quite large during this second event. An attempt is made to interpret the data in the light of linear gravity theory. It is found that linear gravity waves of frequency and phase speed as observed were able to propagate throughout the troposphere on 16 July. We conjecture on the basis of linear theory that the wave of 29 September was propagating on the surface inversion.

Keywords

Boundary Layer Gravity Wave Phase Speed Gravity Theory Wave Event 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Belitz, H. J. and Kottmeier, C.: 1987, ‘Meteorological Research Using a High Mast on an Antarctic Ice Shelf’,Marine Technology 18, 5–10.Google Scholar
  2. Haase, S.: 1991, ‘Numerical Simulation of the Bore-like Cold Front of 8 October 1987’,Tellus 43A, 97–105.Google Scholar
  3. Kikuchi, T.: 1988, ‘A Case Study of a Wave-like Cloud and Gravity Wave in the Lower Troposphere in Mizuho Plateau, Antarctica’,Boundary-Layer Meteorology 43, 403–409.Google Scholar
  4. King, J., Mobbs, S., Darby, M. and Rees, J.: 1987: ‘Observations of an Internal Gravity Wave in the Lower Troposphere at Halley, Antarctica’,Boundary-Layer Meteorology 9, 1–13.Google Scholar
  5. Kottmeier, Ch., Wachs, P. and Sannemann, K.: 1992, Coastal Antarctic PBL flows under varying external influences. IMA Conf. Rep. “Waves and turbulence in stably stratified fluids”;Inst. Math. Appl., Leeds; in press.Google Scholar
  6. Lindzen, R. and Kuo, H. L.: 1969, ‘A Reliable Method for the Numerical Integration of a Large Class of Ordinary and Partial Differential Equations’,Mon. Weath. Rev. 97, 732–735.Google Scholar
  7. Rees, J.: 1987, ‘The Propagation of Internal Gravity Waves in the Stably Stratified Atmospheric Boundary Layer’,Ann. Geophys. 53, 421–432.Google Scholar
  8. Rees, J. and Mobbs, S.: 1988, ‘Studies of Internal Gravity, Waves at Halley Base, Antarctica, Using Wind Observations’,Quart. J. Roy. Meteorol. Soc. 114, 939–966.Google Scholar

Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • J. Egger
    • 1
  • C. Wamser
    • 2
  • C. Kottmeier
    • 2
  1. 1.Meteorologisches InstitutUniversität MünchenGermany
  2. 2.Alfred-Wegener-InstitutBremerhavenGermany

Personalised recommendations