rossby
Cumulus
Este site é bastante interessante pois baseia-se nas reanalises (ERA40, etc) do ECMWF:
http://www.meteoswiss.ch/web/en/climate/worldwide_climate/spatial_climate_anomalies.html
http://www.meteoswiss.ch/web/en/climate/worldwide_climate/spatial_climate_anomalies.html