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利用区域海洋模拟系统(Regional Ocean Modeling Systems,ROMS 3.0)数值模式和κ-ε湍流封闭方案,对渤海温跃层的季节演变过程进行模拟.再现了渤海层化自4月开始至9月结束的演变过程,得到了层化时期渤海中部浅滩的南部和北部洼地的“非对称的双中心底层冷水”结构,即位于辽东湾内的渤海北部洼地的底层温度要低于渤海南部低洼地的底层温度约1～4℃.渤海地形特征产生的海水热容量的区域差异和净热通量的纬度差异是早期形成非对称的双中心冷水结构的主要原因.数值Lagrangian浮子跟踪试验结果支持增温季节的北黄海和辽东半岛西侧的深层冷水对双中心冷水结构的维持有一定贡献,且主要不是以平流方式直接进入南、北洼地中心,其中北黄海和辽东半岛西侧的深层冷水对北部冷中心的贡献均明显超过对南部冷中心的贡献.潮混合使南、北洼地冷中心温度的不对称性更加显著.
Using the regional Ocean Modeling Systems (ROMS 3.0) numerical model and the κ-ε turbulence closure scheme, the seasonal evolution of the Bohai Sea thermocline is simulated, and the stratigraphy of the Bohai Sea is reconstructed from April to the end of September The temperature of the bottom of the northern Bohai Sea in Liaodong Bay is lower than that in the southern Bohai low-lying land. The “asymmetric double-center cold water” structure in the southern and northern depressions in the middle Bohai Sea shoal was obtained during the stratification. The temperature is about 1 ~ 4 ℃ .The latitudinal difference between the seawater heat capacity and the net heat flux generated by the topographic features of the Bohai Sea is the main reason for the formation of an asymmetric double-center cold water structure in the early stage.The numerical Lagrangian float tracking test results support the warming season Deep cold water in the northern Yellow Sea and west of Liaodong Peninsula contributes to the maintenance of double-center cold water structures, and does not directly enter into the center of the south and north depression by advection. Deep cold water in the northern Yellow Sea and west of Liaodong Peninsula, Contributed significantly to the contribution of the southern cold center. The tidal mixing caused the asymmetry of temperature in the cold center of the south and north depression Plus significant.