Composite map for each phase of MJO
Notice: Composite maps for multivariate EOF type of 'OLR+U850+U200' based on JRA-3Q were incorrect during a period from around 03 UTC on May 30 to around 04 UTC on June 14, 2023, and were replaced by correct but older ones based on JRA-55. The maps based on JRA-3Q are under reconstruction.

Multivariate EOF type OLR+U850+U200 Chi200+U850+U200    MJO Phase 1 2 3 4 5 6 7 8
Month Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec.    Mean Period Monthly Pre 3-month    Element 200hPa velocity potential 200hPa stream function 850hPa stream function 200hPa height 500hPa height 1000hPa height sea surface pressure 200hPa zonal wind 300hPa zonal wind 200hPa meridional wind 850hPa temperature 2m temperature

The shading indicates a 95% confidence level.
The anomalies for composite analysis are defined as 20- to 70-day band-pass filtered fields based on 141-point Lanczos filter (Duchon 1979).
The analysis period is Jan. 1980 - Sep. 2012 and the base period for the normal is 1991 - 2020.
The date for the composite are extracted provided that amplitude of MJO ((RMM1²+RMM2²)^1/2) is larger than 1.