Calculated from the Kaplan SST. Area averaged SST in the Atlantic north of 0. See for more details.

Time Interval: Monthly
Time Coverage: 1871 to present (detrended)
Update Status: Updated Monthly

Get Data:

Please use the detrnded version. The old version is listed for comparison. They are similar except for the detrending.

AMO (detrended, unsmoothed): Standard PSL Format (What is standard format?)
AMO (detrended, smoothed): Standard PSL Format (What is standard format?)

Source:
Data is from PSL using the HadISST1 dataset.
See the AMO webpage.
References:

1. Enfield, D.B., A. M. Mestas-Nunez and P.J. Trimble, 2001: The Atlantic multidecadal oscillation and it's relation to rainfall and river flows in the continental U.S.. Geophysical Research Letters, Vol. 28, 2077-2080.
2. Rayner N. A., D. E. Parker, E. B. Horton, C. K. Folland, L. V. Alexander, D. P. Rowell, E. C. Kent, A. Kaplan, Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century, J. Geophys. Res., 108 (D14), 4407, doi:10.1029/2002JD002670, 2003.

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