Atmospheric teleconnection indices sourced from NOAA/CPC, NOAA/ESRL, updated monthly:

• Arctic Oscillation AO
• North Atlantic Oscillation NAO
• Pacific-North American Pattern PNA
• Pacific Decadal Oscillation PDO (sst)
• Southern Annular Mode SAM
• Southern Oscillation Index
• Atlantic Multidecadal Oscillation AMO (sst)