Seasonal Simulations of a Coupled Ice-ocean Model in the Bohai Sea and North Yellow Sea since the Winter of 1997/1998

摘要

A fine-resolution coupled ice-ocean model configured for the Bohai Sea and North Yellow Sea is presented. A horizontal grid spacing of 3.7km×2.8km was used in this coupled model. Seasonal simulations were made from the winters of 1997/1998 to 2008/2009. By comparing of the simulation results and the remote sensing images, the ice-ocean coupled model reasonably reproduces the seasonal variations of the sea ice conditions in the Bohai Sea and North Yellow Sea. The predicted ice-freezing date, ice-ending date and ice periods are in fairly good agreement with observations, and some are even identical to measurements. Moreover, the simulation of maximum sea ice extent date matches well. Normally, the sea ice thickness of the west part in Liaodong bay is less than that of the east part, which can be reproduced well by the ice-ocean coupled model. However, during the melting period, simulated sea ice melts much faster than observations, and the model loses accuracy in simulation of specific ice thickness distribution.