The spatial structure of the Arctic sea ice concentration (SIC) variability and the connection to atmospheric as well as radiative forcing during winter and summer for the 1979–2017 period are investigated. The interannual variability with different spatial characteristics of SIC in summer and winter is extracted using the empirical orthogonal function (EOF) analysis. The present study confirms that the atmospheric circulation has a strong influence on the SIC through both dynamic and thermodynamic processes, as the heat flux anomalies in summer are radiatively forced while those in winter contain both radiative and “circulation-induced” components. Thus, atmospheric fluctuations have an explicit and extensive influence to the SIC through complex mechanisms during both seasons. Moreover, analysis of a variety of atmospheric variables indicates that the primary mechanism about specific regional SIC patterns in Arctic marginal seas are different with special characteristics.

研究了1979-2017年期间冬季和夏季北极海冰浓度（SIC）变异性的空间结构及其与大气和辐射强迫的联系。利用经验正交函数（EOF）分析，提取了夏季和冬季SIC不同空间特征的年际变化。本研究证实，大气环流通过动态和热力学过程对SIC都有很大影响，因为夏季的热通量异常被辐射强迫，而冬季的热通量异常包含辐射和“循环诱发”分量。因此，在两个季节中，大气波动都通过复杂的机制对SIC产生了明显而广泛的影响。此外，