Daily Madden-Julian Oscillation (MJO) Indices from NOAA/Climate Prediction Center
Entry ID: NOAA_NWS_CPC_MJO

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Summary
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.

Related URL
Link: GET DATA
Description: Access to MJO Index documentation, graphs, and data


Geographic Coverage
 N: 30.0 S: 0.0  E: 70.0  W: 80.0
 Min Altitude: 0HPA  Max Altitude: 200 HPA

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 Prediction
Online Resource: http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_mjo_index...


Temporal Coverage
Start Date: 1978-01-01


Location Keywords
GEOGRAPHIC REGION > EQUATORIAL
GEOGRAPHIC REGION > TROPICS


Data Resolution
Temporal Resolution: daily, pentad


Science Keywords
ATMOSPHERE >ALTITUDE >GEOPOTENTIAL HEIGHT    [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE >OSCILLATIONS >MADDEN-JULIAN OSCILLATION INDEX    [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE >PRESSURE ANOMALIES    [Definition]
CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >EL NINO SOUTHERN OSCILLATION (ENSO) >ENSO    [Definition]
CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >MADDEN-JULIAN OSCILLATION    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Keywords
MJO
Madden-Julian Oscillation Index
climate index
climate indices
atmospheric circulation
climate change
ENSO
El Nino Southern Oscillation
tropical intersasonal oscillation


Data Set Progress
IN WORK


Originating Center
NOAA/NWS/CPC


Data Center
Climate Prediction Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce    [Information]
Data Center URL: http://www.cpc.ncep.noaa.gov/
Dataset ID: MJO Index

Data Center Personnel
Name: JON GOTTSCHALCK
Email: Jon.Gottschalck at noaa.gov



Distribution
Distribution_Media: online www
Distribution_Format: ascii
Fees: none


Personnel
JON GOTTSCHALCK
Role: TECHNICAL CONTACT
Email: Jon.Gottschalck at noaa.gov


SCOTT A. RITZ
Role: DIF AUTHOR
Phone: 301-614-5126
Fax: 301-614-5268
Email: Scott.A.Ritz at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: Maryland
Postal Code: 20771
Country: USA


Publications/References
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.,
28, 702-708.

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.)
http://www.crseo.ucsb.edu/esrg/papers/paper3/toga_paper.html

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:
http://www.coaps.fsu.edu/lib/elninobib/Madden-Julian-Oscillation/

Creation and Review Dates
DIF Creation Date: 2003-02-13
Last DIF Revision Date: 2009-11-04

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