An auto-discovery "cycle" duration. Obtainable by finding the dominant ISO component. On a daily basis I am doing just that. A while back I began following a specific feature and tracking it back through the long-term recurring Rossby.
Short-term ISO on Apr-13
Midwest 500mb Correlations Apr 1-30
What are these charts showing? The correlation of the 500mb flow over the Midwest. Y axis is correlation coefficient, X axis is days. I correlate each station on a daily basis looped 10-80 days backward in time to find the most positive correlation. The change is in days of the ISO translated to the mid latitude Rossby wave. Analyzing the oscillations we can then apply standing wave harmonics to find the recurring weather patterns.
Below is a KMCI MaxT reanalysis based on ISO (r=0.716) and LRC (r=0.017). Out with the old and in with the new?
If there are any questions, comments, or suggestions on the material presented please let me know. Thanks for reading! More to come.