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针对渤海海冰的生消漂移规律，以及对海冰数值模式延长预报时间、增强预报时效的要求，本文推导了与之相适应的海冰热力学过程的数学描述。并在考虑海冰中短期变化规律的基础上，对太阳短波辐射、净长波辐射及海洋热通量，提出以日平均量代替一个时间步长内的平均来进行处理的方法。个例研究表明该方法有较好的模拟能力，这为海冰数值预报延长预报时效提供了有效的保障。
In view of the birth and disappearance drift law of the sea ice in the Bohai Sea, as well as the requirements of the sea ice numerical model to prolong the forecast time and enhance the forecasting aging, a mathematical description of the sea ice thermodynamic process is deduced. On the basis of taking into account the short-term variation of sea ice, a method of treating the shortwave solar radiation, the net longwave radiation and the ocean heat flux by using the average daily volume instead of the average within one time step is proposed. A case study shows that this method has a good ability to simulate, which provides an effective guarantee for prolonging forecasting validity of numerical predictions of sea ice.