(courtesy of iridl.ldeo.columbia.edu)
Time-Pressure section of the spatial average of equatorial (5°S to 5°N) zonal winds from the NCEP-NCAR Reanalysis data set between 100 hPa and 10 hPa for the last ten years on a 2.5 x 2.5 deg. lat/lon grid.
Red indicates west winds, blue indicates east winds.
(courtesy of www.geo.fu-berlin.de)