基于11年高度计数据的中国海海平面变化初步研究

利用1992年10月~2004年1月共11 a的TOPEX/Poseidon(T/P)和Jason-1高度计数据,对中国海海平面的时空变化变化做了初步分析,并且对11 a间海平面的上升速率进行了分析。研究发现中国海海平面11 a间的一些基本的变化特征:(1)11 a间中国海海平面变化被两次厄尔尼诺-拉尼娜现象分成了5个阶段;(2)中国海海平面变化以1 a周期为主,其中黄海和东海变化较为相似,以1 a周期信号为主,而渤海则还有2个月的周期信号,南海还有0.5 a信号;(3)11 a间,渤海海平面变化振幅最大,黄海和东海次之,南海变化最小,南海海平面变化受厄尔尼诺-拉尼娜事件影响程度最大,黄海和东海次之,渤海最小;(4)中国海海平面的上升速率为0.593 cm/a,渤海、黄海、东海、南海的上升速率依次为0.365,0.517,0.683,0.611 cm/a。分析结果为中国海海平面的变化规律、厄尔尼诺现象对中国海海平面变化的影响以及对未来海平面上升趋势的预测提供了有力的依据。

Budget of nutrients and model in estuaries and coastal zone

Using the 11 years' TOPEX/Poseidon-Jason altimeter data from Oct.1992 to Jan.2004,the authors do a preliminary analysis on the spatial-temporal variations of the China Sea level,and then analyze the rise rate of the sea level during the past 11.3 years.The results show some variation characteristics of the China Sea level in 11.3 a:(1) The sea level variation of the China Sea during 11.3 a is seperated into 5 phases by El Nino-La Nina;(2) The major variation period is 1 a,and the variation of the Yellow Sea is similar to that of the East China Sea;(3) The variation amplitude of the Bohai Sea is the biggest,and that of the South China Sea is the smallest,El Nino-La Nina made a most effect on the South China Sea and a least effect on the Bohai Sea;(4) The rise rate of the China Sea level is 0.593 cm/a,and the rise rates of the Bohai Sea,the Yellow Sea,the East China Sea and the South China Sea are 0.365,0.517,0.683,and 0.611 cm/a respectively.The results supply an evidence for theresearch of China Sea level variation characteristics,effects of El Nino-La Nina on China Sea level variation and the predict of sea level rise rate.