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Maurice Blackmon and two dimensional spectral analysis:

Maurice Blackmon and two dimensional spectral analysis:. The power and the glory Joe Tribbia NCAR. No, not that power and glory!. Title Disclaimer. Historical Disclaimer. “All history is LIES agreed upon” Napoleon*. *Attributed by Barbara Tuchman Noted historian.

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Maurice Blackmon and two dimensional spectral analysis:

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  1. Maurice Blackmon and two dimensional spectral analysis: The power and the glory Joe Tribbia NCAR

  2. No, not that power and glory! Title Disclaimer

  3. Historical Disclaimer “All history is LIES agreed upon” Napoleon* *Attributed by Barbara Tuchman Noted historian

  4. Celebrate 1st Publication in Atmospheric Science

  5. Early 1970s Transition Particle Physics -- Atmospheric science One career/hobby for another

  6. Maurice’s One True Vocation

  7. On to the power…..

  8. Computed Spherical harmonic spectra of 500mb height Computed Spectra for Winter and Summer 1963-72

  9. Many tables with lots of numbers (Power) Power in Frequency domain vs Two dimensional Wavenumber (n) Power for fixed Frequency for Each Spherical Harmonic

  10. Comparison with 1990s 5 day power Winter ’63-72 5day power JFM ’90-99

  11. Comparison with 1990s 15 day power Winter ’63-72 15 day power JFM ’90-99

  12. Enough power,on to the glory….

  13. Introduced (now classic)bandpass filters

  14. Compare variance with 1990’s Total JFM RMS Amplitude Ten year JFM mean Total Winter RMS Amplitude Nine year Winter mean

  15. Lowpass Regime I (1963-72)Winter RMS amplitude All waves Regime I

  16. Lowpass Regime I (1990s)JFM RMS amplitude All waves Regime I

  17. Three Centers of low frequency variability • Pacific (Blocking and PNA) • Atlantic (Blocking and NAO) • Eurasian (?) • Inspiring research up to present day

  18. Great beginning of 2nd career/hobby“Well begun is half done”Mary Poppins*Maurice was just warming up *Attributed by noted historian Joe Tribbia

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