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AGU: Geophysical Research Letters

 

Keywords

  • noctilucent clouds
  • planetary waves
  • summer mesopause

Index Terms

  • Atmospheric Composition and Structure: Aerosols and particles
  • Atmospheric Processes: Tides and planetary waves
  • Atmospheric Processes: Clouds and aerosols
  • Atmospheric Processes: Mesospheric dynamics
  • Atmospheric Processes: Remote sensing

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 34, L24808, 6 PP., 2007
doi:10.1029/2007GL030987

Satellite observations of the quasi 5-day wave in noctilucent clouds and mesopause temperatures

C. von Savigny

Institute of Environmental Physics, University of Bremen, Bremen, Germany

C. Robert

Institute of Environmental Physics, University of Bremen, Bremen, Germany

H. Bovensmann

Institute of Environmental Physics, University of Bremen, Bremen, Germany

J. P. Burrows

Institute of Environmental Physics, University of Bremen, Bremen, Germany

M. Schwartz

Jet Propulsion Laboratory, Pasadena, California, USA

We report on simultaneous measurements of the westward propagating quasi 5-day wave in the occurrence rate of noctilucent clouds (NLCs) and the temperature field at NLC altitude during the 2005 NLC season in the northern hemisphere. NLCs are detected using SCIAMACHY/Envisat limb scattering measurements, and the temperature profiles are measured with MLS/Aura. Quasi 5-day wave signatures are clearly identified in both physical and wavelet space. We find good general agreement in the quasi 5-day wave activity of NLC occurrence rates and the mesopause temperature field, indicating that planetary wave signatures in the temperature field are the main driver of corresponding signatures in NLCs.

Received 19 June 2007; accepted 16 November 2007; published 25 December 2007.

Citation: von Savigny, C., C. Robert, H. Bovensmann, J. P. Burrows, and M. Schwartz (2007), Satellite observations of the quasi 5-day wave in noctilucent clouds and mesopause temperatures, Geophys. Res. Lett., 34, L24808, doi:10.1029/2007GL030987.

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