Climate Timeseries

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Arctic Oscillation (AO) Index from the 20thC Reanalysis

Projection of monthly mean 1000 mb Height anomalies onto 1st EOF poleward of 20-degrees North. Values are normalized by the 1979-2000 period.

Time Interval: Monthly
Time Coverage: 1871 to 2010
Update Status: None

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AO: Standard PSL Format (What is standard format?)

Data is from NOAA/ESRL PSL using data from the 20th Century Reanalysis. Method used to calculate timeseries follows that of NOAA/CPC's AO timeseries.

  1. Thompson, D. W. J, and J. M. Wallace, 1998: The Arctic Oscillation signature in the wintertime geopotential height and temperature fields. Geophys. Res. Lett., 25, 1297-1300.
[ SOI | NAO | Rec NAO | AO | AO20thC | PDO | NP | TPI | Iceland P | Azores P | Gilbralter P | Nagasaki P | Madras P ]
[ Niño1+2 | Niño3 | Niño3.4 | Niño 4 | AMO | Global T stations | Global T+SST (NASA) | Global T+SST (CRU) | Sunspots ]

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