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Daily MJO Indices > MJO-Index AND MJO-Related Influences
Extended Empirical Orthogonal Function (EEOF) analysis is applied
to pentad 200-hPa velocity potential (CHI200) anomalies equatorward of 30°N during ENSO-neutral and weak ENSO
winters (November-April) in 1979-2000. See CPC ENSO
Ten daily MJO indices are constructed by projecting the
daily (00Z) CHI200 anomalies onto the ten time-lagged patterns of the first EEOF of
pentad CHI200 anomalies.
Correlation patterns in the table below show the linear
impacts of the MJO on oceanic and atmospheric variables in the tropics and subtropics.
|200-hPa Velocity Potential
||Outgoing Longwave Radiation
||200-hPa Zonal Wind
||850-hPa Zonal Wind
||200-hPa Stream Function
||Sea Level Pressure
The values in the correlation patterns are correlations between the
anomaly time series at each grid point and the amplitude time series for the first EEOF mode during
boreal winter (November-April).
Composites keyed on the convectively active phase
of the ten MJO indices show both linear and nonlinear impacts of the MJO on the
atmospheric circulation in the global domain.
The blue (yellow) shading denotes negative (positive) anomalies
significant at the 95% level with a 2-tailed student's t test. The shading in the precipiation composites
denotes the percentage departure relative to the climatological pentad precipitation based on the