Numerical Sea Ice Forecast Experiment of PIC Model for the Bohai Sea 
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Numerical Sea Ice Forecast Experiment of PIC Model for the 
Bohai Sea 
LIU Yu, BAI Shan, LIU Qinzheng and WU Huiding 
National Marine Environment Forecasting Center, Beijing, 100081, China 
E-mail: liuvu@nmefc.aov.cn 
Abstract Based on dynamic and thermodynamic research of sea ice and the ice conditions 
in the Bohai Sea, a Particle-ln-Cell (PIC) sea ice model has been applied to sea ice 
forecasting in the Bohai Sea. The PIC method is introduced into the sea ice model to 
efficiently reduce the numeric diffusion inherent in the Bohai Sea operational ice model. The 
multi-category ice thickness distribution is used to replace the three-level ice thickness 
distribution as well. Numerical sea ice experimental forecasts for the Bohai Sea were made 
by using the PIC model for 3 winter seasons, and the statistical analysis and comparison of 
sea ice forecast results were made. 
Key words Sea ice; Numerical sea ice forecast; Particle-ln-Cell method; Statistical 
verification