东中国海潮流结构数值模拟与分析  

Numerical simulation of the tidal current in the East China Sea

作　　者：褚芹芹[1] 张鑫[2] 孙佳[2] 

机构地区：[1]国家海洋局秦皇岛海洋环境监测中心站,河北秦皇岛066002 [2]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《海洋预报》2015年第4期51-60,共10页Marine Forecasts

基　　金：国家重点基础研究发展计划"973"项目(2007CB411807);2015年河北省海洋水文气象观测;预报及海洋灾害预警项目(2015036616)

摘　　要：采用FVCOM海洋数值模式建立了东中国海三维潮汐潮流的数值模型,并模拟了该海域的潮波运动。通过潮流的数值实验结果与实测结果的对比分析发现,半日分潮流的最大流速值随经度和纬度的增加逐渐减小,且极值点出现的深度呈递增趋势;最大流速的流向从低纬至高纬右旋,但随经度增大会发生左旋,流向极值点深度随纬度增大会逐步减小。低纬度海区的全日分潮流最大流速值高于高纬度海区;最大流速的流向的变化与半日分潮流相同,但流向极值点深度随经度增大会逐步增加。在垂向上,半日分潮流最大流速随深度的增加先增大后减小,最大流速的流向在流向极值点深度的上层右旋(顺时针),在下层左旋(逆时针);全日分潮流的最大流速在垂向上呈递减趋势,其流向同样是在流向极值点深度的上层右旋,在下层左旋。The tidal movement in the East China Sea is simulated in this article using a 3D FVCOM ocean circulation model. By comparing the numerical results and the observation data, the results show that the maximum velocity of semi-diurnal tidal current decreases with the increasing of longitude and latitude, and the depth of extreme value increases. The maximum velocity direction rotates to the right with the increasing of latitude and to the left with the increase of longitude. Meanwhile, the depth of current direction extreme value decreases with the increasing of latitude. For the diurnal tidal current, the maximum velocity in low latitude is higher than that in high latitude. The variation characteristic of maximum velocity direction of diurnal tidal current presents the same characteristic as semi-diurnal tidal current. Moreover, the depth of current direction extreme value increases with the increasing of longitude. In the vertical direction, the maximum velocity of semi-diurnal tidal current increases to the maximum and then decrease with the increasing depth, but the diurnal tidal current is diminishing. The semi-diurnal and diurnal tidal current direction rotate to the right in the upper layer of current direction extreme value depth and to the left in the lower layer.

关 键 词：东中国海 数值模型 潮流 垂向结构 

分 类 号：P731.23[天文地球—海洋科学]