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利用参数辨识和冰厚观测研究了固定冰冰底海洋热通量,建立了冰底薄层能量平衡系统,证明了系统解的存在与唯一性.以海洋热通量为辨识参数,观测和计算冰厚差值为目标函数,建立最优辨识模型.利用有界变差函数理论分析最优辨识模型最优解的存在性,通过改进遗传算法求得最优解.根据现场观测的2006-2007年冬季中山站附近固定冰冰厚数据进行了数值模拟,通过2005-2006年数值结果检验表明所建立的冰底薄层能量平衡系统及参数辨识模型是正确有效的.
By using parameter identification and ice thickness observation, the paper studies the heat flux of fixed ice-bottom ocean and establishes the thin-layer energy balance system of ice-bottom, and proves the existence and uniqueness of the system. Taking the heat flux of the ocean as the identification parameter, observing and calculating the ice The thickness difference is the objective function and the optimal identification model is established.The existence of the optimal solution of the optimal identification model is analyzed by using the theory of bounded variation function and the optimal solution is obtained by improved genetic algorithm.According to the field observation of 2006-2007 Numerical simulation of fixed ice thickness data near Zhongshan Station in winter is carried out. The numerical results from 2005 to 2006 show that the established ice sheet energy balance system and parameter identification model are correct and effective.