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利用环辽东湾地区的大洼、锦州、绥中、熊岳、营口、旅顺6个站1960年~2007年48年间冬季(12月~次年2月)平均气温资料及1996年~2004年9年间渤海海冰面积资料,分析了辽东湾沿岸冬季平均气温与渤海海冰面积之间的相关关系,得出除1996年和1997年两年外,其余各年6站冬季平均气温与渤海海冰面积的变化呈现很好的负相关,相关系数达-0.85565。之后分析了环辽东湾地区冬季平均气温年变化规律及其影响因素,从而利用环辽东湾地区冬季平均气温年变化规律,根据二者的负相关关系推测出渤海海冰面积的年变化规律。研究结果显示,1960年~2007年渤海海水结冰日数年变化呈现明显的两段分布:1960年~1988年间渤海海水结冰日数以73天为中心上下振荡;1989年~2007年间以55天为中心上下振荡。研究结果还显示,在海冰面积相对较小的1989年~2007年间,未出现海冰面积逐年减小的趋势,并对产生这种年变化规律的影响因素进行了初步分析。探讨渤海海冰面积的年变化规律及其影响因素,对将渤海海冰作为淡水资源加以开发利用的研究具有有益的参考价值。
Using the average temperature data of 6 stations in Dawa, Jinzhou, Suizhong, Xiong Yue, Yingkou and Lushun districts of Liaodong Bay from 1960 to 2007 (December to February) from 1960 to 2007 and 9 The data of sea ice area in the Bohai Sea during the year were analyzed. The correlation between the winter average air temperature in the Liaodong Bay coast and the sea ice area in the Bohai Sea was analyzed. The results showed that the mean winter temperatures of 6 stations in each year except 1996 and 1997 were the same as those in the Bohai Sea The change of area showed a very good negative correlation with a correlation coefficient of -0.85565. Then, the annual variation law of winter average air temperature and its influencing factors are analyzed. Based on the annual variation law of winter average air temperature in Dongliao Bay, the annual variation law of sea ice area in Bohai Sea is deduced according to the negative correlation between them. The results show that there is a clear two-period distribution of sea ice freezing days in the Bohai Sea from 1960 to 2007: the number of ice-freezing days in the Bohai Sea fluctuated around 73 days from 1960 to 1988; and the days from 1989 to 2007 were 55 days Center up and down oscillation. The results also show that there is no trend that the area of sea ice decreases year by year from 1989 to 2007 with a relatively small area of sea ice, and the influencing factors of the annual variation are analyzed preliminarily. Studying the annual variation law of sea ice area in the Bohai Sea and its influencing factors will be helpful for the research on the exploitation and utilization of the sea ice in the Bohai Sea as freshwater resources.