HOME > Climate & Weather Linkage > Madden Julian Oscillation

  • Current Conditions
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  • Forecasts
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  • US CLIVAR MJO Forecast Project

The US CLIVAR program has instituted an MJO working group and a sub-group has been tasked to develop forecast metrics for inter-comparison of numerical models from several operational centers. The decision was made for NCEP / CPC to host the production, display, and evaluation of these metrics.
CPC Forecast Metrics Web Page
US CLIVAR MJO Working Group

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  • Additional MJO Products

Time-Longitude Sections of MJO-Associated Anomalies Only
Outgoing Longwave Radiation
850-hPa Zonal Wind
200-hPa Zonal Wind
200-hPa Vel Potential
850-hPa Vel Potential
Global tropics benefits/hazards briefing sequence web page

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  • Expert Discussions

A global tropics benefits/hazards assessment that incorporates the current state and anticipated evolution of the MJO as input can be found as part of CPC's expert assessments.

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  • Composites

MJO composites based on a multivariate index utilizing outgoing longwave radiation, 850 hPa zonal wind and 200 hPa zonal wind data (Wheeler and Hendon, 2004). Examples of the index are available at the Bureau of Meteorology Research Centre. Only data significant at the 95% confidence interval are shaded in the composites.

  November - March May - September
200 hPa Velocity PotentialNovember - March 200 hPa Velocity PotentialMay - September 200 hPa Velocity Potential
Outgoing Longwave RadiationNovember - March Outgoing Longwave RadiationMay - September Outgoing Longwave Radiation
PrecipitationNovember - March PrecipitationMay - September Precipitation
850 hPa Wind and Velocity PotentialNovember - March 850 hPa Wind and Velocity PotentialMay - September 850 hPa Wind and Velocity Potential
Sea Level PressureNovember - March Sea Level PressureMay - September Sea Level Pressure

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  • Educational Material

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  • Publications

Higgins, R. W., and S. D. Schubert, 1996: Simulations of persistent North Pacific circulation anomalies and interhemispheric teleconnections. J. Atmos. Sci., 53, 188-207.

Higgins, R. W., and K. C. Mo, 1997: Persistent North Pacific circulation anomalies and the tropical intraseasonal oscillation. J. Climate, 10, 223-244.

Higgins, R. W., J. K. Schemm, W. Shi and A. Leetmaa, 2000a: Extreme precipitation events in the western United States related to tropical forcing. J. Climate, 13,793-820.

Higgins, R. W., and W. Shi, 2001: Intercomparison of the principal modes of interannual and intraseasonal variability of the North American Monsoon System. J. Climate, 14, 403-417.

Kousky, V. and M. Kayano, 1994: Principal modes of outgoing longwave radiation and 250-mb circulation for the South American sector. J. Climate, 1994, 1131-1143.

Kayano, M. and V. Kousky, 1999: Intraseasonal (30-60 day) variability in the global tropics: principal modes and their evolution. Tellus, 51, 373-386.

Mo, K. C. and R. W. Higgins, 1998: Tropical influences on California precipitation. J. Climate, 11, 412-430.

Zhang, C. and J. Gottschalck, 2002: SST Anomalies of ENSO and the Madden-Julian Oscillation in the Equatorial Pacific. Journal of Climate, 15, 2429-2445.

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