我国历史文献中有过一些海区结冰的记载,称之为冻海。它对于航海和历史气候的研究有一定参考价值,现对山东半岛的冻海资料作简要分析。 There have been some recorded icing in the sea in the historical documents of our country, which is called frozen sea. It has certain reference value for the study of navigation and historical climate, and now it makes a brief analysis of the frozen sea data of Shandong Peninsula.