基于气温的浮冰侧向融化速率参数化方案实验研究

An experimental study on parametric scheme of lateral melting rate of ice layer based on temperature

为定量探究影响冰层侧向融化的主导因素,并简化冰层侧向融化速率参数化方案,在实验室模拟了无风、静水、无辐射、纯热力学条件下纯水冰的融化过程,测量了冰层的侧向融化量,并记录了融化期间实验室气温、冰面皮温、水温及冰温等要素。观测结果表明,无辐射纯热力学条件下冰层侧向融化整体较均匀,侧向上层和下层融化速率相对中间层较快;相关性分析结果表明,气温与水温、冰温、冰面皮温之间都有很好的线性相关;信息流结果表明,气温是影响冰层侧向融化的最主要因素;最后通过拟合建立了用气温表征冰层侧向融化速率的参数化方案,并与前人的方案进行了比较,结果显示本文参数化方案模拟效果较好,所得标准偏差最小,为0.08 mm/h,达到了简化参数的目的。

In order to quantitatively explore the main factors that affect the lateral melting of the ice layer and simplify the parametric scheme of the lateral melting rate of the ice layer, the melting process of pure water ice under the conditions of no wind, still water, no radiation and pure thermodynamics was simulated in the laboratory, the lateral melting amount of the ice layer was measured, and the laboratory air temperature, ice skin temperature, water temperature, ice temperature and other factors during melting were recorded. The observation results show that under the pure thermodynamic condition of no radiation, the ice layer melts uniformly in the lateral, and the melting rate of the upper and lower layers is faster than that of the middle layer. The results of correlation analysis show that there is a good linear correlation between air temperature and water temperature, ice temperature and ice skin temperature. Information flow results show that air temperature is the most important factor affecting the lateral melting of ice. Finally, a parametric model between the lateral melting rate and the air temperature is established by fitting, and is compared with previous parametric schemes. The results show that the parametric model in this study has a better simulation effect, and the standard deviation is the smallest, which is 0.08 mm/h, thus achieving the purpose of simplifying the parameters.