Madden-Julian Oscillation

Madden-Julian Oscillation Analysis from NCAR

This module computes many of the diagnostics described by the WGNE MJO Task Force and developed by Dennis Shea for observational data. Using daily precipitation, outgoing longwave radiation, zonal wind at 850 and 200 hPa and meridional wind at 200 hPa, the module computes anomalies, bandpass-filters for the 20-100 day period, calculates the MJO Index as defined as the running variance over the bandpass filtered data, performs an EOF analysis, and calculates lag cross-correlations, wave-number frequency spectra and composite life cycles of MJO events.

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b.e23_alpha16b.BLT1850.ne30_t232.049
NCEP Reanalysis

EOF analysis

EOF analysis 30S to 30N (lat-lon map, time series)
pr summer b.e23_alpha16b.BLT1850.ne30_t232.049 pr summer b.e23_alpha16b.BLT1850.ne30_t232.049
pr summer TRMM pr summer TRMM
pr winter b.e23_alpha16b.BLT1850.ne30_t232.049 pr winter b.e23_alpha16b.BLT1850.ne30_t232.049
pr winter TRMM pr winter TRMM
rlut summer b.e23_alpha16b.BLT1850.ne30_t232.049 rlut summer b.e23_alpha16b.BLT1850.ne30_t232.049
rlut summer ERA rlut summer ERA
rlut winter b.e23_alpha16b.BLT1850.ne30_t232.049 rlut winter b.e23_alpha16b.BLT1850.ne30_t232.049
rlut winter ERA rlut winter ERA
u850 summer b.e23_alpha16b.BLT1850.ne30_t232.049 u850 summer b.e23_alpha16b.BLT1850.ne30_t232.049
u850 summer ERA u850 summer ERA
u850 winter b.e23_alpha16b.BLT1850.ne30_t232.049 u850 winter b.e23_alpha16b.BLT1850.ne30_t232.049
u850 winter ERA u850 winter ERA
u200 summer b.e23_alpha16b.BLT1850.ne30_t232.049 u200 summer b.e23_alpha16b.BLT1850.ne30_t232.049
u200 summer ERA u200 summer ERA
u200 winter b.e23_alpha16b.BLT1850.ne30_t232.049 u200 winter b.e23_alpha16b.BLT1850.ne30_t232.049
u200 winter ERA u200 winter ERA
v200 summer b.e23_alpha16b.BLT1850.ne30_t232.049 v200 summer b.e23_alpha16b.BLT1850.ne30_t232.049
v200 summer ERA v200 summer ERA
v200 winter b.e23_alpha16b.BLT1850.ne30_t232.049 v200 winter b.e23_alpha16b.BLT1850.ne30_t232.049
v200 winter ERA v200 winter ERA

lag-cross-correlations

The climatological cross correlation plots
lag lat lon summer b.e23_alpha16b.BLT1850.ne30_t232.049 lag lat lon summer ERA
lag lat lon winter b.e23_alpha16b.BLT1850.ne30_t232.049 lag lat lon winter ERA
lag lat lon annual b.e23_alpha16b.BLT1850.ne30_t232.049 lag lat lon annual ERA

wavenumber - frequency spectra

The wavenumber - frequency spectra plots (b.e23_alpha16b.BLT1850.ne30_t232.049 vs obs)
pr summer b.e23_alpha16b.BLT1850.ne30_t232.049 pr summer TRMM
pr winter b.e23_alpha16b.BLT1850.ne30_t232.049 pr winter TRMM
rlut summer b.e23_alpha16b.BLT1850.ne30_t232.049 rlut summer ERA
rlut winter b.e23_alpha16b.BLT1850.ne30_t232.049 rlut winter ERA
u850 summer b.e23_alpha16b.BLT1850.ne30_t232.049 u850 summer ERA
u850 winter b.e23_alpha16b.BLT1850.ne30_t232.049 u850 winter ERA
v850 summer b.e23_alpha16b.BLT1850.ne30_t232.049 v850 summer ERA
v850 winter b.e23_alpha16b.BLT1850.ne30_t232.049 v850 winter ERA
u200 summer b.e23_alpha16b.BLT1850.ne30_t232.049 u200 summer ERA
u200 winter b.e23_alpha16b.BLT1850.ne30_t232.049 u200 winter ERA
v200 summer b.e23_alpha16b.BLT1850.ne30_t232.049 v200 summer ERA
v200 winter b.e23_alpha16b.BLT1850.ne30_t232.049 v200 winter ERA

composite life cycles

The composite life cycles (b.e23_alpha16b.BLT1850.ne30_t232.049 vs obs)
summer b.e23_alpha16b.BLT1850.ne30_t232.049 summer b.e23_alpha16b.BLT1850.ne30_t232.049 summer ERA
winter b.e23_alpha16b.BLT1850.ne30_t232.049 winter b.e23_alpha16b.BLT1850.ne30_t232.049 winter ERA