Based on the simulation of the M_2 tide in the Bohai,Yellow and East China Seas,numerical experiments are made to study 4 strategies on the bottom friction coefficient(BFC) in a numerical adjoint model.

• 使用伴随同化方法探讨了四种底摩擦系数处理方法并模拟了渤黄东海的M2分潮.；理想实验表明:伴随同化方法有很强的反演底摩擦系数的能力;