A. J. Haklander, P. C. Siegmund, H. M. Kelder

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$(PHH98 2d-Slide#15 $8 of 8$) - Atmospheric Dynamics Group$

• Which factors determine the observed interannual variability in H 100 95% significance level [v*T*] poorly defined at lowermost levels due to extrapolation below the Earth’s surface – Variable tropospheric wave source Correlation coefficients of H 100 with [v*T*] averaged over 20-90°N not significant in the troposphere. → Total tropospheric wave source probably not a very important factor
Which factors determine the observed interannual variability in H 100 s = zonal wavenumber → Fig. a) Only wave 1,2 components of H 100 significantly correlated with the same component of the upward wave activity flux in the troposphere → Fig. b) Wave 4 preferred mode for breaking of very long waves in upper stratosphere
Page 1 and 2: Interannual variability of the stra
Page 3 and 4: Why is the NH midwinter wave drivin
Page 5 and 6: Why is the NH midwinter wave drivin
Page 7 and 8: How is the wave driving quantified
Page 9 and 10: How is the wave driving quantified
Page 11: Which factors determine the observe
Page 15: Which factors determine the observe
Page 18 and 19: Conclusions → Most of the interan
Page 20: Questions

A. J. Haklander, P. C. Siegmund, H. M. Kelder

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