利用渤、北黄海M2同潮图找出北纬34度开边界条件，通过画网格线确定北纬34度处M2的振幅迟角度数。再利用运动方程与控制场以及渤、北黄海水深数据确定M2分潮的潮位在一个周期的变化情况。-Use of the Bohai Sea, the North Yellow Sea the M2 with tidal Figure identify open boundary conditions of 34 degrees north latitude, by drawing grid lines to determine the number of degrees of north latitude and 34 degrees at the M2 amplitude late. Re-use of the equations of motion and control field Bo, North Yellow Sea water depth data to determine the M2 tidal tide in a cycle of changes.