Datasets / Climate Prediction Center (CPC) Madden-Julian Oscillation (MJO) Index

Climate Prediction Center (CPC) Madden-Julian Oscillation (MJO) Index

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Published By National Oceanic and Atmospheric Administration, Department of Commerce

Issued over 9 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

The Climate Prediction Center (CPC) Madden Julian Oscillation index (MJO) is a dataset that allows evaluation of the strength and phase of the MJO during the dataset period. The index is based on pentad 200-hPa velocity potential data equator ward of 30?N during El Ni?o/Southern Oscillation (ENSO) neutral and weak ENSO winters (November-April) in 1979-2000. An extended Empirical Orthogonal Function (EEOF) analysis is used to identify ten time-lagged patterns. Ten MJO indices are determined by projecting the pentad 200-hPa velocity potential anomalies onto the ten time-lagged patterns of the first EEOF of pentad 200-hPa velocity potential anomalies. Anomalies are based on the 1979-1995 period, and each index is normalized by its standard deviation during ENSO-neutral and weak ENSO winters (November-April) in 1979-2000.

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