摘要
基于非结构化网格、有限体积三维海洋模型FVCOM建立了海洋-海冰耦合的渤海海冰数值模拟系统.模型中考虑了海冰动力过程和海冰热力过程,讨论了适合渤海的冰厚度分类规则、临界冰厚、短波辐射在冰内的透射率以及冰的热传输系数的合理取值.利用美国国家环境预报中心(NCEP)一小时一次的再分析气象数据作为驱动对2003—2004年冬季渤海海冰过程进行了模拟.模拟的渤海温盐计算值与实测值吻合较好,模拟的渤海冰盖分布与同期卫星遥感结果接近,模拟的辽东湾初冰日、终冰日的海冰面积、海冰厚度及其最大值和最大值对应的时刻与实测值基本一致.模拟与实测结果对比表明,建立的三维海冰数值模型能比较合理地反映渤海动力过程、气象条件影响下的温盐场过程以及渤海海冰的生消演化过程,具有较高的计算精度和计算效率,适合用于渤海海冰中长期数值模拟.
An ice-ocean coupled sea ice numerical simulation system of the Bohai Sea, including the dynamic proc- esses and thermodynamic processes of sea ice, was developed based on the unstructured grid three-dimensional finite- volume coastal ocean model （FVCOM）. Reasonable values of ice thickness, critical thickness for thinnest ice, ratio of shortwave radiation penetrating into the ice and heat transfer coefficient were discussed. The sea ice evolution of the Bohai Sea in 2003--2004 winter was simulated with the hourly time-series atmospheric data of NCEP （National Cen- ters for Environmental Prediction） as a driving force. The simulated results of sea water temperature and salinity of the Bohai Sea are in good agreement with the measured data. The simulated ice coverage of the Bohai Sea is close to the image obtained by satellite remote sensing in the same period. The simulated sea ice area and sea ice thickness of Liaodong Bay are basically the same as the measured data for the start date, the end date, the maximum value and the corresponding time. It is shown that the presented three-dimensional numerical model of sea ice can reasonably simulate the process of hydrodynamic, sea water temperature and salinity, and the evolution of sea ice forced by meteorological conditions. The model can be applied to medium- and long-term sea ice numerical simulation with high accuracy and computational efficiency.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2013年第4期333-341,共9页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学基金创新研究群体科学基金资助项目(51021004)
天津市自然科学基金重点资助项目(12JCZDJC30200)
