中文摘要：

通过对黑龙江省、吉林省、辽宁省以及内蒙古的42个城市在2011/2012年度、2012/2013年度和2013/2014年度冬季的最低气温等温线图,分析东北地区冷空气的活动特征以及这三个年度冬季渤海的冰情,可得：冷空气过程会带来降温;冷空气的运动方向主要是从内蒙古向东北三省运动;冷空气在内蒙古和黑龙江北部的活动速度较快,而由东北三省的大部分城市所组成的内陆地区的活动速度较慢;2012/2013年度冬季渤海冰情较为严重,而2013/2014年度冬季渤海冰情相对较轻.

英文摘要：

Through the isotherms analysis of 42 cities in Heilongjiang, Jilin, Liaoning and Inner Mongolia Provinces in the winters of 2011/2012, 2012/2013 and 2013/2014, we get the movement characteristics of cold air and its relationships with the ice conditions of winter Bohai Sea The results show that cold air will result in a drop in air temperature, and the movement direction of the cold air blown is mainly from Inner Mongolia to the other three northeastern provinces. The cold air in Inner Mongolia and the northern part of Heilongjiang Province moves more quickly while that in most northeast cities in inland area moves slowly. The ice conditions of Bohai Sea in 2012 winter is serious, while in 2013 winter is relatively slight.