海平面上升导致渤、黄、东海潮波变化的数值研究Ⅱ——海平面上升后渤、黄、东海潮波的数值模拟  

Numerical Research on Tidal Waves Changes Due to Mean-Sea-Level Rise in the Bohai Sea,the Huanghai Sea and the East China SeaⅡ: Numerical Modeling of Tidal Waves after Mean-Sea-Level Rise in the Areas

作　　者：于宜法[1] 刘兰[1] 郭明克[2] 

机构地区：[1]中国海洋大学,山东青岛266003 [2]国家海洋局北海预报中心,山东青岛266033

出　　处：《中国海洋大学学报（自然科学版）》2007年第1期7-14,共8页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(40576011;40376005);教育部新世纪优秀人才支持计划(NCET-04-0646)资助

摘　　要：采用球面潮波运动基本方程，利用开边界强迫水位条件和考虑天体引潮力，对海平面上升后渤、黄、东海的潮波运动进行了数值模拟。根据权威性的IPCC报告和论文，选取丁模拟过程所需的海平面上升量。模拟包括19个理论系数最大的分潮波。根据模拟结果绘制了分潮同潮图，并与现有分潮的同潮图进行了比较和分析。可以看出：海平面上升后的分潮同位相线相对于现有的分潮同位相线沿逆时针方向发生偏转，海平面上升后的分潮无潮点的位置相对_}二现有分潮无潮点的位置发生偏移，海平面上升后的分潮振幅与现有分潮振幅之差有一定的分布模式。从利用模拟结果推算的主要潮位极值可以看出：海平面上升1m后。有些地方的天文最高潮位升高量可达12～16cm，海图深度基准面降低量可达10～12cm。Tidal waves after mean-sea-level rise were modeled by using spherical tidal wave equations with the tide-generating force being taken into account, and with open boundary condition being taken as forced tidal elevation. According to authoritative IPCC report and articles, the increment of mean-sea-level was chosen. After mean-sea-level rise the modeling covered 19 tidal constituent waves with the largest theoretical coefficients. Cotidal charts were drawn and compared with those of current tidal waves. It can be found that the co＇phase lines of tidal waves after mean-sea-level rise deflect relatively to those of current tidal waves anticlockwise, the amphidromic point positions of tidal waves after mean-sea-level rise shift relatively to those of current tidal waves, and that there exist certain distribution patterns in the differences between the amplitudes of tidal waves after mean-sea-level rise and those of current tidal waves. AIso it can be seen from the tidal level extreme values calculated by modeled results that after 1 m mean-sea-level rise, the increases of the highest astronomical tidal levels can reach 12-16 cm, and the decreases of chart datums can reach 10-12 cm in some places. These changes are nonnegligible,

关 键 词：渤 黄 东海 数值模拟 海平面上升后的潮波 潮波变化 

分 类 号：P731.23[天文地球—海洋科学]