福建近海海平面变化研究

Study on sea level variability in off shore Fujian

利用福建沿海几个主要验潮站数据与法国空间局（CNES）AVISO多卫星融合资料分析了福建近海及其周边海域海平面的时、空变化特征及主要模态,并简要分析福建近海海平面变化趋势.得到如下结论：近54a（1960~2013年）福建沿海相对海平面上升约2 mm/a,福建沿海海平面变化存在显著的季节变化和2~3a及6~8a的年际变化特征,这与ENSO和长周期天文分潮的变化周期较为吻合;对比同期卫星高度计资料和潮位站资料（1993~2012年）发现,卫星高度计与潮位站分析结果基本一致;卫星高度计和潮位站分析结果表明,福建沿海区域海平面近20a平均线性变化趋势约为4 mm/a.

Based on the observations of tide gauge stations and the sea level anomaly（ SLA） data obtained from the Archiving,Validation and Interpretation of Satellite Oceanographic（ AVISO）,the seasonal and inter-annual variations and the long-term trend of the SLA in off shore Fujian were investigated. The results show that the sea level has a significant seasonal variations with regional characteristics in this areas. There was an obvious trend in the sea level rising at an average rate of 2 mm / a during the period of 54 years in 1960 ~ 2013,observed by 4 tide gauge stations along the Fujian coast. Characterized by remarkable seasonal and inter-annual variations in periods of 2 ~3 years and 6 ~ 8 years,the sea level changes are consistent with those of ENSO cycles and long period astronomical tides,respectively. The results obtained from satellite altimeter measurements are in good agreement with the observations of tide gauges. The analyses,with data from the satellite altimeter and the gauge stations,show a rate of 4 mm / a sea level rising in off shore Fujian during the period of 1993 ~ 2012.