Pilot-LEWIZ - Pilot campaign

Scientific Goals

  • To observe inertia-gravity wave during a Rossby wave breaking event with radiosondes and VHF radar
  • To diagnose inertia-wave properties from a joint data analysis
  • To develop a conceptual model for the generation of inertia-gravity waves in the tropospheric jet

Organisation

  • Principle investigator: Dieter H.W. Peters
  • Contributors: Peter Hoffmann, Matthias Alpers & the LEWIZ team
  • Runtime: December 1999 - December 2000
  • Funding:  IAP

 

Activities

  • Field campaign in Kühlungsborn from 17 to 19 December 1999 including radiosondes and VHF radar (LEWIZ-K1) accompanied with analysis and simulation data

 

Results

  • inertia-gravity waves were successfully sampled with 3-hourly launched radiosondes and VHF radar in tropospheric mode
  • inertia-gravity wave properties were analysed using Hovmoeller plots, rotary spectra and the Doppler shift between intrinisic frequency (from the radiosonde) and aparant frequency (from the radar)

Hovmöller diagrams for zonal wind fluctuations from (Fig. 1) radiosondes and (Fig. 2) VHF radar. The different inclination of the phase lines is an effect of the Doppler shift - while the radiosonde moves with the basic stream, the radar is fixed in space.

  • a conceptual model was developed describing inertia-gravity wave packets propagating upstream and away from the tropospheric jet which could be identified as the energy source

 

  • The MM5 model was used to simulate inertia-gravity waves with near-realistic amplitudes and to develop a scale-independent diagnosis of their sources.

Publications

  • Peters, D., P. Hoffmann and M. Alpers, 2003: On the appearance of inertia-gravity waves on the north-eastarly side of an anticyclone. Meteorol. Z. 12 (1): 25-35
  • Serafimovich, A., P. Hoffmann, D. Peters, and V. Lehmann, 2004: Investigation of inertia-gravity waves in the upper troposphere / lower stratosphere over northern Germany observed with collocated VHF / UHF radars. Atmos. Chem. Phys., 5, 295 - 310.
  • Zülicke, Ch. and D. Peters, 2006: Simulation of inertia-gravity waves in a poleward breaking Rossby wave. J. Atmos. Sci. 63, 12: 3253 - 3276, doi:10.1175/JAS3805.1

Nach oben

Privatdozent Dr. habil. Dieter H.W. Peters

Tel. : +49 (0) 38293 68 380
Fax : +49 (0) 38293 68 50