Signal: Negative Arctic Oscillation
ArcticOscillationJan2011Grabsmaller

Cold weather over U.S. linked to record low Arctic sea ice

Arctic sea ice extent for January 2011 was the lowest in the satellite record for that month. The Arctic oscillation persisted in its strong negative phase for most of the month…[and]…cold conditions in northern Europe and the U.S. are linked to the strong negative mode of the Arctic oscillation. Cold air is denser than warmer [...]

ArcticSeaIceDec2010

Record low December sea ice driving extreme weather conditions

The extreme negative Arctic Oscillation, driven by record low sea ice, has been identified as one of the primary drivers of cold, snowy winters for the eastern U.S. and western Europe.