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

dropAct_mtime. Anomalies are relative to the 0002-0009 mean.
2-3
4-5
6-7
8-9

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.
dropAct_mtime
NCEP Reanalysis
CAM3 Amip (T85)

Histograms

Histograms of daily precipitation rate for the Tropics and NH Extratropics.
dropAct_mtime
NCEP Reanalysis
CAM3 Amip (T85)

EOF analysis

EOF analysis 30S to 30N (lat-lon map, time series)
PRECT summer dropAct_mtime PRECT summer dropAct_mtime
PRECT summer TRMM PRECT summer TRMM
PRECT winter dropAct_mtime PRECT winter dropAct_mtime
PRECT winter TRMM PRECT winter TRMM
FLUT summer dropAct_mtime FLUT summer dropAct_mtime
FLUT summer ERA FLUT summer ERA
FLUT winter dropAct_mtime FLUT winter dropAct_mtime
FLUT winter ERA FLUT winter ERA
U850 summer dropAct_mtime U850 summer dropAct_mtime
U850 summer ERA U850 summer ERA
U850 winter dropAct_mtime U850 winter dropAct_mtime
U850 winter ERA U850 winter ERA
U200 summer dropAct_mtime U200 summer dropAct_mtime
U200 summer ERA U200 summer ERA
U200 winter dropAct_mtime U200 winter dropAct_mtime
U200 winter ERA U200 winter ERA
V200 summer dropAct_mtime V200 summer dropAct_mtime
V200 summer ERA V200 summer ERA
V200 winter dropAct_mtime V200 winter dropAct_mtime
V200 winter ERA V200 winter ERA

lag-cross-correlations

The climatological cross correlation plots (dropAct_mtime vs obs)
lag lat lon summer dropAct_mtime lag lat lon summer ERA
lag lat lon winter dropAct_mtime lag lat lon winter ERA
lag lat lon annual dropAct_mtime lag lat lon annual ERA

wavenumber - frequency spectra

The wavenumber - frequency spectra plots (dropAct_mtime vs obs)
PRECT summer dropAct_mtime PRECT summer TRMM
PRECT winter dropAct_mtime PRECT winter TRMM
FLUT summer dropAct_mtime FLUT summer ERA
FLUT winter dropAct_mtime FLUT winter ERA
U850 summer dropAct_mtime U850 summer ERA
U850 winter dropAct_mtime U850 winter ERA
V850 summer dropAct_mtime V850 summer ERA
V850 winter dropAct_mtime V850 winter ERA
U200 summer dropAct_mtime U200 summer ERA
U200 winter dropAct_mtime U200 winter ERA
V200 summer dropAct_mtime V200 summer ERA
V200 winter dropAct_mtime V200 winter ERA

composite life cycles

The composite life cycles (dropAct_mtime vs obs)
summer dropAct_mtime summer ERA
winter dropAct_mtime winter ERA