渤海冰水间的热传递系数

Heat Transfer Coefficient Between Ice Cover and Water in the Bohai Sea

首先讨论了通过冰盖底面的热量平衡来计算冰水间热传递系数的方法,并利用—冬季辽 19971998 东湾海域定点观测的气象、水文和海冰资料,对冰水间的热传递系数进行了计算。结果表明,不同 JZ20-2 冰期的热传递系数有很大差异。在初冰期和融冰期较小,分别为× 0.1610-3和× 0.0410-3,而在盛冰期最大,可达× 0.510-3;利用本文确定的热传递系数对—冬季的海洋热通量进行了计算,得到了其在 19971998 整个冰期内的变化规律。本文工作对渤海海冰数值模拟和预测中海洋热通量的计算有很好的参考价值。

The calculative method of heat transfer coefficient between ice cover and water is analyzed considering the heat balance at ice bottom firstly. The heat transfer coefficient is calculated with the meteorological, oceanographic data and sea ice conditions measured on the JZ20-2 Oil/Gas Platform in the Liaodong Bay during the whole winter of 1997/1998. From the ,resultswe can see that the heat transfer coefficient is smaller in the freezing period and the ×melting period, 0.1610-3× and 0.0410-3 respectively. In the middle ice season, the heat transfer ×coefficient is lager, about 0.510-3, . At lastthe influences of ice thickness and ice type on the heat transfer coefficient are discussed. With the heat transfer coefficient determined above, the oceanic heat flux in the winter of 1997-1998 is calculated, and its trend in the whole winter is obtained. The study results can be referenced to the sea ice numerical simulation and forecasting in the Bohai Sea.