1,500-year cycle in the Arctic Oscillation (AO) Discovered

A team of scientists led by Old Dominion University geological oceanographer Dennis Darby published an article in the journal Nature Geoscience that it has identified for the first time a clear 1,500-year cycle in the Arctic Oscillation (AO), the surface atmosphere pressure pattern in the far north that greatly influences weather in the Northern Hemisphere.

See full [archived 2014] story here: Darby Team Finds Climate Evidence in Arctic Sea Sediments

Darby, D.A., Ortiz, J. D., Grosch, C., and Lund, S., 2012, 1,500 year cycle in the Arctic Oscillation identified in Holocene Arctic sea-ice drift.Nature Geoscience,doi: 10.1038/NGEO1629.