ESRL : PSD : Download Climate Timeseries: AMO SST

Climate Timeseries

AMO (Atlantic Multidecadal Oscillation) Index

Description:

The timeseries are calculated from the Kaplan SST dataset which is updated monthly. It is basically an index of the N Atlantic temperatures. Time 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 present
Update Status: updated monthly

Get Data:

AMO unsmooth, long: Standard PSD Format (What is standard format?)

AMO smoothed, long.

AMO unsmoothed, short (1948 to present).

AMO smoothed, short (1948 to present).

Source:

Timeseries is calculated at NOAA PSD.

Method:

Use the Kaplan SST dataset (5x5).
Compute the area weighted average over the N Atlantic, basically 0 to 70N.
Detrend that time series
Optionally smooth it with a 121 month smoother.

For those who require unaltered data, the following is an undetrended version of the N. Atlantic monthly averages with the 1951-1980 NOAA ERSST climatology added back in.
N. Atlantic SST averages, unsmoothed & undetrended (1856 to present) and the climatolgy used (from the NOAA ERSST V2 SST, interpolated to a 5x5 grid).

References and Citation:

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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