中文摘要：

大西洋亚板区是北冰洋和大西洋物质能量交换的通道，在全球变化中有重要地位。本文主要研究了大西洋亚极区的海平面变化趋势，对51个验潮站水位数据采用了经验模态分解方法、灰色系统方法、以及随机动态方法3种方法做分析，并对海平面变化趋势做了对比。总结了大西洋亚极区的海平面变化趋势：整个海域内海平面变化不一致，西欧地区海平面总体呈现上升趋势，上升速率平均为0．108cm／a；北欧地区海平面总体呈现下降趋势，下降速率平均为-0．211cm／a。

英文摘要：

The seas in subpolar of the Atlantic are the channel of substance and energy communication between the Arctic and the world ocean. Therefore they take important roles in global climate change. The study mainly focuses on the trends of the sea level changes of the seas in subpolar area of the At- lantic. Sea level data from fifty one tide gauges were analyzed by three methods respectively： empirical mode decomposition （EMD）, gray system method （GSM）, and stochastic dynamic method （SDM）. The results of the trend calculated by these methods were compared each other. The results show that sea level is rising averagely, but nonuniform variations of sea level exhibited geographically. Basically, averaged rising rate of the western Europe sea is positive with rate of 0. 108cm/a while the northern Europe part of the sea presents a falling tendency with rate of 0. 221cm/a.