AMWG Variability Diagnostics for 6-Hourly Data


Wavenumber-Frequency Power Spectra

Zonal wavenumber-frequency logarithm of power spectra calculated from 06Z and
18Z data (summed 15S to 15N) of anti-symmetric and symmetric components of data.

Fortran code for computing the space-time spectra and the observed OLR dataset
supplied by Matthew Wheeler.
See Wheeler and Kiladis, JAS, vol 56, 374-399, 1999.

The observed OLR data is from NOAA polar-orbiting satellites and covers
the period 1979-2000. The CAM3 Amip (t42) and NCEP Reanalysis data are for the
period 1991-2000.

OLR (outgoing LW radiation) cam5_F2000_var NOAA NCEP CAM3 Amip (T42)
Anti-symmetric raw power spectra (WK99 Fig. 1a) plot plot plot plot
Symmetric raw power spectra (WK99 Fig. 1b) plot plot plot plot
Background power spectra (WK99 Fig. 2) plot plot plot plot
Anti-symmetric/background power spectra (WK99 Fig. 3a) plot plot plot plot
Symmetric/background power spectra (WK99 Fig. 3b) plot plot plot plot
U200 (200 mb zonal wind) cam5_F2000_var NCEP CAM3 Amip (T42)
Anti-symmetric raw power spectra (WK99 Fig. 1a) plot plot plot
Symmetric raw power spectra (WK99 Fig. 1b) plot plot plot
Background power spectra (WK99 Fig. 2) plot plot plot
Anti-symmetric/background power spectra (WK99 Fig. 3a) plot plot plot
Symmetric/background power spectra (WK99 Fig. 3b) plot plot plot
U850 (850 mb zonal wind) cam5_F2000_var NCEP CAM3 Amip (T42)
Anti-symmetric raw power spectra (WK99 Fig. 1a) plot plot plot
Symmetric raw power spectra (WK99 Fig. 1b) plot plot plot
Background power spectra (WK99 Fig. 2) plot plot plot
Anti-symmetric/background power spectra (WK99 Fig. 3a) plot plot plot
Symmetric/background power spectra (WK99 Fig. 3b) plot plot plot
PRECT (precipitation rate) cam5_F2000_var NCEP CAM3 Amip (T42)
Anti-symmetric raw power spectra (WK99 Fig. 1a) plot plot plot
Symmetric raw power spectra (WK99 Fig. 1b) plot plot plot
Background power spectra (WK99 Fig. 2) plot plot plot
Anti-symmetric/background power spectra (WK99 Fig. 3a) plot plot plot
Symmetric/background power spectra (WK99 Fig. 3b) plot plot plot
OMEGA500 (500 mb vertical velocity) cam5_F2000_var NCEP CAM3 Amip (T42)
Anti-symmetric raw power spectra (WK99 Fig. 1a) plot plot plot
Symmetric raw power spectra (WK99 Fig. 1b) plot plot plot
Background power spectra (WK99 Fig. 2) plot plot plot
Anti-symmetric/background power spectra (WK99 Fig. 3a) plot plot plot
Symmetric/background power spectra (WK99 Fig. 3b) plot plot plot