Interdecadal Changes of the Solar-Arctic Oscillation Relationship and Their Effects on the Arctic Climate Change during Boreal Winter

摘要

Previous studies documented that the low solar activity since thebeginning of the 21st century could directly drive the wintertime climatevariability resembling the negative Arctic Oscillation (AO) responses.This study investigates the interdecadal variations of the solar-AOrelationship and the related Arctic climate change. Results show thatwith more solar radiation mild (cold) winters are in the east (west) ofGreenland after mid-1980s, in accordance with the positive AO-likepattern, which can be well explained by the coupling betweenstratosphere and troposphere. By contrast, the solar-related circulationanomalies are totally reversed before mid-1930s, corresponding to theopposite solar-AO connection.