20世纪全球海平面年代际间变率及区域特征

Decadal Variability and Regional Characteristics of Global Sea Level During the 20th Century

利用PSMSL全球海潮测量资料,分析了100多年以来全球海平面的年代际间变化特征,同时对区域变化特征进行了分析,得出全球海平面自30世纪70年代以来持续上升,全球海平面上升的区域变化特征明显,特别是最近30 a以来区域海平面变率增大。海平面变化的这种趋势和全球地面温度变化趋势相似。对几个有着较长时间记录的潮汐站测量资料进行了分析,从更长的时间尺度上调查了海平面的长期变化趋势。对全球潮汐测量资料的长期变化趋势分析后,得出在过去一个世纪里全球海平面呈现一个整体上升的趋势,在北大西洋和太平洋西部,海平面出现了近40 mm/a的上升量。

In this paper, decadal variability of global mean sea level is analyzed over one century using the datasets of global ocean tide measurement data from permanent service for mean sea level （PSMSL）. Their local characteristics were also analyzed. The result reveals that the global mean sea level has continued to rise since the 1970s, particularly in the last 30 years there is largely regional variability of sea level. The long-term variability of sea level change was also investigated using the several tidal stations measurement data with long time series. Finally, after the analysis of the long-term tendency in the last century, there is almost the entirely rise of sea level, especially in the northern of Atlantic and the western of the Pacific with a rise of nearly 40 mm/a.