Institute of Atmospheric Physics;
Chinese Academy of Sciences;
Beijing 100029;
School of Atmospheric Science;
Sun Yat-sen University;
and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai);
Zhuhai 519082;
University of Chinese Academy of Sciences;
Beijing 100049;
decadal change; sea ice over the Barents–Kara Seas; stratospheric polar vortex; tropospheric wave-train structure; planetary waves;