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Daily MJO Indices > Pentad MJO Indices




Extended Empirical Orthogonal Function (EEOF) analysis is applied to pentad 200hPa velocity potential (CHI200) anomalies equatorward of 30°N during ENSOneutral and weak ENSO winters (NovemberApril) in 19792000. See CPC ENSO classification .
Ten MJO indices are the minus projection of the pentad CHI200 anomalies onto the ten timelagged patterns of the first EEOF of pentad CHI200 anomalies.
Anomalies are based on the 19791995 period, and each index is normalized by its standard deviation during ENSOneutral and weak ENSO winters (NovemberApril) in 19792000.
Pentad MJO indices since 1978:
 Graphical format (click each year in the following table)
Note that the blueish (reddish) color represents the enhanced (suppressed ) convection, and the xaxis labels the centers (20°E, 70°E, 80°E, 100°E, 120°E,
140°E, 160°E, 120°W, 40°W and 10°W) of enhanced convection for the ten indices, which are determined from the ten timelagged patterns of the first EEOF of CHI200.


Ascii format for downloading


