On the Different Behavior of the Zonal Harmonic Height Waves 1 and 2 During the Winters 1970/71 and 1971/72

View More View Less
  • 1 Institute für Mereorologie. Freie Universität Republic, Federal Republic of Germany
© Get Permissions
Full access

Abstract

This study extends earlier findings (Labitzke, 1977b) that Major Stratospheric warmings occur if height wave 1 reaches a pronounced maximum in the middle stratosphere concurrent with a marked minimum of height wave 2. It is shown that this result is also valid for the troposphere and that the planetary-scale height waves in the troposphere display an interannual variability similar to that found in the stratosphere. In addition the phases of the daily planetary-scale waves in the troposphere are less variable, i.e., the main circulation systems tend to be stationary, during those winters when the stratospheric circulation is relatively undisturbed and height wave 2 is well developed in the troposphere and stratosphere, but fast traveling components occur during the disturbed winters after the breakdown of the stratospheric polar vortex.

Abstract

This study extends earlier findings (Labitzke, 1977b) that Major Stratospheric warmings occur if height wave 1 reaches a pronounced maximum in the middle stratosphere concurrent with a marked minimum of height wave 2. It is shown that this result is also valid for the troposphere and that the planetary-scale height waves in the troposphere display an interannual variability similar to that found in the stratosphere. In addition the phases of the daily planetary-scale waves in the troposphere are less variable, i.e., the main circulation systems tend to be stationary, during those winters when the stratospheric circulation is relatively undisturbed and height wave 2 is well developed in the troposphere and stratosphere, but fast traveling components occur during the disturbed winters after the breakdown of the stratospheric polar vortex.

Save