基于FVCOM多种定解条件的数值分析与评估  

Numerical Analysis and Evaluation Based on Multiple Definite Solution Conditions of FVCOM

作　　者：陈昌刚 丁扬 姚志刚 张丛 CHEN Changgang;DING Yang;YAO Zhigang;ZHANG Cong(Key Laboratory of Physical Oceanography,MOE,China,Qingdao 266100,China;College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China;Marine Science Research Institute of Shandong Province,Qingdao 266104,China)

机构地区：[1]物理海洋教育部重点实验室,山东青岛266100 [2]中国海洋大学海洋与大气学院,山东青岛266100 [3]山东省海洋科学研究院,山东青岛266104

出　　处：《海洋科学进展》2023年第3期397-411,共15页Advances in Marine Science

基　　金：山东省自然科学基金面上项目(ZR2021MD007);国家自然科学基金面上项目(42076010);国家自然科学基金重点项目(42130403)。

摘　　要：利用7套温盐初始场、5套开边界强迫场海洋数据产品与温盐流观测数据,基于有限体积海岸模型(Finite-Volume Coastal Ocean Model,FVCOM),开展数值模型的初始场敏感性试验与开边界敏感性试验,定义一个分叉角度指标描述黄海暖流分叉特征,利用小波分析和功率谱分析方法研究分叉角度的冬季季节内变率,进而分析冬季东中国海的流场结构,包括黑潮、台湾暖流、对马暖流等的路径、来源特征。结果表明:在渤、黄、东海中,使用涡解高精度海洋模型(OGCM for the Earth Simulator,OFES)的再分析数据作为温盐初始场,以及使用简单海洋数据同化资料(Simple Ocean Data Assimilation,SODA)作为开边界强迫场时,温盐流与观测值综合偏差最小,FVCOM的冬季数值结果最可靠;使用分叉角度指标可以直观地描述冬季黄海暖流的消退变化,受风场影响,分叉角度存在3 d、5~8 d的强周期变化。Sensitivity tests for the initial field and open boundary of numerical model based on the Finite Volume Coastal Ocean Model(FVCOM)were carried out using 7 sets of initial temperature and salinity fields,5 sets of open boundary conditions from ocean reanalysis data sets and observations of temperature and salinity.A bifurcation angle indicator was introduced to describe the bifurcation characteristics of the Yellow Sea warm current,and wavelet and power spectrum analysis methods were used to study the intra-seasonal variability of the bifurcation angle in winter.It shows that the numerical results of FVCOM are most reliable when the reanalysis data of the eddy solving high precision ocean model(OFES)were used as the initial field of temperature and salinity,and the data of simple ocean data assimilation information(SODA)were used as the open boundary condition.The bifurcation angle indicators can well describe the changes of the Yellow Sea Warm Current,and it has strong period of 3 days,5 days,and 8 days due to the influence of wind fields.

关 键 词：有限体积海岸模型(FVCOM) 初始场 开边界 黄海暖流 黑潮 

分 类 号：P731.2[天文地球—海洋科学]