Climate Timeseries

AMO (Atlantic Multidecadal Oscillation) Index

The timeseries are calculated from the Kaplan SST dataset which is updated monthly. It is basically an index of the N Atlantic temperatures. Time series are created; a smoothed version and an unsmoothed version. In addition, two files starting at 1948 are produced to be used in the Correlation webpages.
Time Interval: Monthly
Time Coverage: 1856 to Jan 2023
Update Status: updated monthly
Get Data: Source:
  • Timeseries is calculated at NOAA PSL.
  1. Use the Kaplan SST dataset (5x5).
  2. Compute the area weighted average over the N Atlantic, basically 0 to 70N.
  3. Detrend that time series
  4. Optionally smooth it with a 121 month smoother.
References and Citation:
  1. Enfield, D.B., A.M. Mestas-Nunez, and P.J. Trimble, 2001: The Atlantic Multidecadal Oscillation and its relationship to rainfall and river flows in the continental U.S., Geophys. Res. Lett., 28: 2077-2080.
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