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. 2015 Jun 22;10(6):e0131349. doi: 10.1371/journal.pone.0131349

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© 2015 Bruce E. Kurtz

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 1 — The AMO is the difference between the North Atlantic sea surface temperature (SST) and its trend line (slope equal to 0.0026 K yr⁻¹ for 1856–2013). The annual measurements (black dotted line) are smoothed with a 13-year centered moving average filter (black solid line). The sinusoid (red dashed line) is a least squares fit to the moving average. The data are from the NOAA Earth System Research Laboratory (ESRL) AMO website, http://www.esrl.noaa.gov/psd/gcos_wgsp/Timeseries/AMO/.