Articles | Volume 22, issue 8
https://doi.org/10.5194/cp-22-1423-2026
https://doi.org/10.5194/cp-22-1423-2026
Research article
 | 
04 Aug 2026
Research article |  | 04 Aug 2026

Multidecadal behavior of the North Atlantic Oscillation during the last millennium

Andrew A. Flaim, Bronwen L. Konecky, and Sloan Coats

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Cited articles

Adolphi, F. and Muscheler, R.: Synchronizing the Greenland ice core and radiocarbon timescales over the Holocene – Bayesian wiggle-matching of cosmogenic radionuclide records, Clim. Past, 12, 15–30, https://doi.org/10.5194/cp-12-15-2016, 2016. 
Alley, W. M.: The Palmer Drought Severity Index: Limitations and Assumptions, J. Climate Appl. Meteor., 23, 1100–1109, https://doi.org/10.1175/1520-0450(1984)023<1100:TPDSIL>2.0.CO;2, 1984. 
Ault, T. R., Cole, J. E., Overpeck, J. T., Pederson, G. T., St. George, S., Otto-Bliesner, B., Woodhouse, C. A., and Deser, C.: The Continuum of Hydroclimate Variability in Western North America during the Last Millennium, J. Climate, 26, 5863–5878, https://doi.org/10.1175/JCLI-D-11-00732.1, 2013. 
Baldini, L. M., McDermott, F., Foley, A. M., and Baldani, J. U. L.: Spatial variability in the European winter precipitation δ 18O-NAO relationship: Implications for reconstructing NAO-mode climate variability in the Holocene, Geophys. Res. Lett., 35, https://doi.org/10.1029/2007GL032027, 2008. 
Bamzai, A. S. and Shukla, J.: Relation between Eurasian snow cover, snow depth, and the Indian summer monsoon: An observational study, J. Climate, 12, 3117–3132, https://doi.org/10.1175/1520-0442(1999)012<3117:RBESCS>2.0.CO;2, 1999. 
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Short summary
The North Atlantic Oscillation (NAO) is an important driver of year-to-year weather variability in Europe and North America, but its behavior on longer timescales is disputed. We present a new reconstruction of the NAO over the last millennium using water isotope proxy data from ice cores, speleothems, trees, and other archives. We find pronounced but irregular multidecadal to centennial variability. Better accounting for such variability in climate models is crucial to better project future climate.
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