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THE MADDEN-JULIAN OSCILLATION AND CALIFORNIA RAINFALL Charles Jones University of California Santa Barbara

THE MADDEN-JULIAN OSCILLATION AND CALIFORNIA RAINFALL Charles Jones University of California Santa Barbara. Madden and Julian (1972). The Madden-Julian Oscillation. * Significant case-to-case variability. Modulate the variability of the monsoons in Asia-Australia, Africa and Americas

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THE MADDEN-JULIAN OSCILLATION AND CALIFORNIA RAINFALL Charles Jones University of California Santa Barbara

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  1. THE MADDEN-JULIAN OSCILLATION AND CALIFORNIA RAINFALL Charles Jones University of California Santa Barbara

  2. Madden and Julian (1972) The Madden-Julian Oscillation

  3. * Significant case-to-case variability

  4. Modulate the variability of the monsoons in Asia-Australia, Africa and Americas • Teleconnections with extratropics in both hemispheres • Modulate thermocline variability in the tropical Pacific Ocean • Influence on forecast skills in the tropics and extratropics

  5. Outgoing Longwave Radiation Climatology TC TS TC < TS

  6. MJO • Pentads of OLR 1979-2002 (winter) Filtered 20-90 days anomalies • EOF of OLR anomalies • Active MJO: amplitudes of PC1 and PC2

  7. The Life Cycle of the MJO: Convective Activity Time OLR Data are filtered in time (20-90 days) and composites of OLR anomalies are made Enhanced Convection Suppressed Convection Jones (2000)

  8. Zonal (U) wind component (850 hPa) is filtered in time (20-90 days) and composites of anomalies are made Time Enhanced Convection Easterly anomalies Westerly anomalies

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