AMWG Variability Test Plots

AMWG Variability Diagnostics for Daily Data

Intraseasonal Variability

Daily 200 hPa velocity potential anomalies computed and then averaged
over 5S-5N, 20-70 day bandpass filter then applied. Hovmöller plots.
Bandpass filter response plot
FC55. Anomalies are relative to the 0001-0004 mean.

1-2
3-4

Anomalies computed relative to the time period mean.

NCEP Reanalysis CAM3 Amip (T85)
1981-1982 1981-1982
1983-1984 1983-1984
1985-1986 1985-1986
1987-1988 1987-1988
1989-1990 1989-1990
1991-1992 1991-1992
1993-1994 1993-1994
1995-1996

1997-1998

1999-2000

Madden-Julian Oscillation
Time series of daily 200 hPa zonal wind averaged over 10N-10S.
200 hPa zonal wind bandpass filtered for 20-100 day period.
MJO Index defined as the running variance of the bandpass filtered data.

FC55
NCEP Reanalysis
CAM3 Amip (T85)

Histograms
Histograms of daily precipitation rate for the Tropics and NH Extratropics.

FC55
NCEP Reanalysis
CAM3 Amip (T85)

EOF analysis
EOF analysis 30S to 30N (lat-lon map, time series)

PRECT summer FC55 PRECT summer FC55
PRECT summer TRMM PRECT summer TRMM
PRECT winter FC55 PRECT winter FC55
PRECT winter TRMM PRECT winter TRMM
FLUT summer FC55 FLUT summer FC55
FLUT summer ERA FLUT summer ERA
FLUT winter FC55 FLUT winter FC55
FLUT winter ERA FLUT winter ERA
U850 summer FC55 U850 summer FC55
U850 summer ERA U850 summer ERA
U850 winter FC55 U850 winter FC55
U850 winter ERA U850 winter ERA
U200 summer FC55 U200 summer FC55
U200 summer ERA U200 summer ERA
U200 winter FC55 U200 winter FC55
U200 winter ERA U200 winter ERA
V200 summer FC55 V200 summer FC55
V200 summer ERA V200 summer ERA
V200 winter FC55 V200 winter FC55
V200 winter ERA V200 winter ERA

lag-cross-correlations
The climatological cross correlation plots (FC55 vs obs)

lag lat lon summer FC55 lag lat lon summer ERA
lag lat lon winter FC55 lag lat lon winter ERA
lag lat lon annual FC55 lag lat lon annual ERA

wavenumber - frequency spectra
The wavenumber - frequency spectra plots (FC55 vs obs)

PRECT summer FC55 PRECT summer TRMM
PRECT winter FC55 PRECT winter TRMM
FLUT summer FC55 FLUT summer ERA
FLUT winter FC55 FLUT winter ERA
U850 summer FC55 U850 summer ERA
U850 winter FC55 U850 winter ERA
V850 summer FC55 V850 summer ERA
V850 winter FC55 V850 winter ERA
U200 summer FC55 U200 summer ERA
U200 winter FC55 U200 winter ERA
V200 summer FC55 V200 summer ERA
V200 winter FC55 V200 winter ERA

composite life cycles
The composite life cycles (FC55 vs obs)

summer FC55 summer ERA
winter FC55 winter ERA

NCEP Reanalysis	CAM3 Amip (T85)
1981-1982	1981-1982
1983-1984	1983-1984
1985-1986	1985-1986
1987-1988	1987-1988
1989-1990	1989-1990
1991-1992	1991-1992
1993-1994	1993-1994
1995-1996
1997-1998
1999-2000

PRECT summer FC55	PRECT summer FC55
PRECT summer TRMM	PRECT summer TRMM
PRECT winter FC55	PRECT winter FC55
PRECT winter TRMM	PRECT winter TRMM
FLUT summer FC55	FLUT summer FC55
FLUT summer ERA	FLUT summer ERA
FLUT winter FC55	FLUT winter FC55
FLUT winter ERA	FLUT winter ERA
U850 summer FC55	U850 summer FC55
U850 summer ERA	U850 summer ERA
U850 winter FC55	U850 winter FC55
U850 winter ERA	U850 winter ERA
U200 summer FC55	U200 summer FC55
U200 summer ERA	U200 summer ERA
U200 winter FC55	U200 winter FC55
U200 winter ERA	U200 winter ERA
V200 summer FC55	V200 summer FC55
V200 summer ERA	V200 summer ERA
V200 winter FC55	V200 winter FC55
V200 winter ERA	V200 winter ERA

lag lat lon summer FC55	lag lat lon summer ERA
lag lat lon winter FC55	lag lat lon winter ERA
lag lat lon annual FC55	lag lat lon annual ERA