Composite map for each phase of MJO
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. 1992 - Sep. 2021 and the base period for the normal is 1991 - 2020.
The date for the composite are extracted provided that amplitude of MJO ((RMM1
2
+RMM2
2
)
1/2
) is larger than 1.