Daily Madden-Julian Oscillation (MJO) Indices from NOAA/Climate Prediction CenterEntry ID: NOAA_NWS_CPC_MJO
Abstract: [Source: NOAA Climate Prediction Center, http://www.cpc.ncep.noaa.gov/ ]
An extended Empirical Orthogonal Function (EEOF) analysis is applied to pentad velocity potential at 200-hPa for ENSO-neutral and weak ENSO winters (November-April) during 1979-2000. The first EEOF is composed of ten time-lagged patterns . Ten Madden-Julian Oscillation (MJO) indices are constructed by regressing the daily ... data onto the ten patterns of the first EEOF. Data is available for the ten MJO indices (normalized) for the previous 6 and 12 months.
The MJO Indices are centered at 20E, 70E, 80E, 100E 120E, 140E, 160E, 120W, 40W and 10W indicating centers of enhanced convection for the ten indices, which are determined from the ten time-lagged patterns of the first EEOF of CHI200.
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. Pentad MJO indices are available since 1978.
Data Set Citation
Dataset Originator/Creator: NOAA/NWS/CPC
Dataset Title: Daily Madden-Julian Oscillation Indices
Dataset Series Name: NOAA/NWS/CPC Indices and Forecasts
Dataset Release Date: ongoing
Dataset Release Place: Camp Springs, MD
Dataset Publisher: NOAA National Weather Service, Center for Climate PredictionOnline Resource: http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_mjo_index...
Start Date: 1978-01-01
Temporal Resolution: daily, pentad
ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT
ATMOSPHERE > ATMOSPHERIC PRESSURE > OSCILLATIONS > MADDEN-JULIAN OSCILLATION INDEX
ATMOSPHERE > ATMOSPHERIC PRESSURE > PRESSURE ANOMALIES
CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > TELECONNECTIONS > EL NINO SOUTHERN OSCILLATION (ENSO) > ENSO
CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > TELECONNECTIONS > MADDEN-JULIAN OSCILLATION
ISO Topic Category
Data Set Progress
Distribution Media: online www
Distribution Format: ascii
Role: TECHNICAL CONTACT
Email: Jon.Gottschalck at noaa.gov
Role: DIF AUTHOR
Email: Scott.A.Ritz at nasa.gov
NASA Goddard Space Flight Center Global Change Master Directory
Province or State: Maryland
Postal Code: 20771
Madden, R. A., and P. R. Julian, 1971: Detection of a 40-50 day
oscillation in the zonal wind in the tropical Pacific.J. Atmos. Sci.,
Madden, R. A., and P. R. Julian, 1994: Observations of the 40-50 day
tropical oscillation: a review. Mon. Wea. Rev., 122, 814-837.
Jones, C., D.E. Waliser and C. Gautier 1998. The influence of the
Madden-Julian Oscillation on ocean surface heat fluxes and sea-surface
temperatures. J. Climate 11, 1057-72. (also on the web: Coupled modes
of air-sea interaction and the Madden and Julian oscillation.)
Rui, H., and B. Wang, 1990: Development characteristics and dynamic
structure of tropical intraseasonal convection
anomalies. J. Atmos. Sci., 47, 357-379.
Jones, C. and B.C. Weare 1996. The role of low-level moisture
convergence and ocean latent-heat fluxes in the Madden and Julian
Oscillation. J. Climate, 9, 3086-104.
Hayashi, Y. and D.G. Golder 1993. Tropical 40-50 and 25-30 day
oscillations. J. Atmos. Sci., 50, 464-94.
For additional MJO references, see:
Creation and Review Dates
DIF Creation Date: 2003-02-13
Last DIF Revision Date: 2009-11-04