考虑内潮耗散的南海M_2分潮伴随同化数值模拟  

Data Assimilation of M_2 Tide in the South China Sea Using Adjoint Method Considering the Internal Tide Dissipation

作　　者：高秀敏[1,2] 魏泽勋[2] 吕咸青[1] 王永刚[2] 李淑江[2] 

机构地区：[1]中国海洋大学物理海洋实验室,山东青岛266100 [2]国家海洋局第一海洋研究所海洋环境科学和数值模拟国家海洋局重点实验室,山东青岛266061

出　　处：《中国海洋大学学报（自然科学版）》2014年第7期11-18,共8页Periodical of Ocean University of China

基　　金：国家高技术研究发展计划项目(2013AA09A506);国家重点基础研究发展计划项目(2011CB403502);国家自然科学基金项目(41072176);青岛市科技计划基础研究项目(11-1-4-98-jch);中央级公益性科研院所基本科研业务费专项(2007-31;2014G26)资助

摘　　要：建立南海潮波模式及其伴随同化模式,在传统二维潮波方程的基础上加入了内潮耗散项,考虑了内潮耗散对南海潮波系统的影响,在前人工作基础上,改进了内潮耗散参数化方案,并给出内潮耗散项中地形效应参数的计算公式;通过对比,本文的参数化方案比前人参数化方案能取得更为合理的模拟结果。以63个验潮站和24个TOPEX/Poseidon卫星高度计轨道交叉点处的调和常数作为观测值,利用伴随同化方法来优化模式中的底摩擦系数和内潮耗散系数。为了寻求最优的优化方案,设计了7组数值实验。实验结果表明,实验7先优化内潮耗散系数再优化底摩擦系数的模拟结果最优。利用实验7的模拟结果分析了南海M2分潮的潮波特征,与前人结果基本一致。The tidal and adjoint model are built in the South China Sea （SCS）. A parameterization of internal tide dissipation is added to the traditional 2-D tidal equations, considering the internal tide dissipation on the influence of the tidal wave system in the SCS. Based on previous studies, the parameterization of internal tide dissipation is improved, and the expression of the bottom roughness parameter is given. The results using the bottom roughness parameter given studies. The harmonic constants at 63 tide gauge stations in this paper is more reasonable than previous and 24 T/P satellite altimeter crossover points are used as observations. The bottom friction coefficient and the internal tide dissipation coefficient are optimized by using adjoint method to minimize the distance between the simulated results and observations. In order to get the best optimizing scheme, seven experiments are designed. The numerical results show that Experiment 7 is best. Using the simulated results of Experiment 7, the characteristics of M2 tide in the SCS is analyzed, and agrees with previous studies.

关 键 词：南海 M2分潮 伴随同化 内潮耗散 

分 类 号：P731.23[天文地球—海洋科学]