Waters of the Fram Strait, which runs between Greenland and the Arctic archipelago of Svalbard, have warmed about 3.5 degrees Fahrenheit over the past 100 years, according to the study published in the Jan. 28 issue of the journal Science. Temperatures are about 2.5 degrees higher than during the Medieval Warm Period, a time of elevated warmth from A.D. 900 to 1300.
