Relationship between sea ice thickness and temperature in Bohai Sea of China

To discover water sources of agriculture irrigation for regions around Bohai Sea in China, sea ice in Bohai Sea is considered as the new kind of fresh water resource due to its lower salinity than seawater, and the thermal characteristics of sea ice thickness affected by accumulative temperature were analyzed in the paper. The tentative results showed that the ice thickness growth is proportional to time in a second-degree polynomial under air temperature lower than -1.4 degrees C. Before 3911, hour, ice thickness increased very quickly, with a speed of 1.5mm/h, and after the 40(th) hour, its growth speed had decreased and maintained at approximately 0.24 mm/h. The linear model was useful to study sea ice thickness and its evolution in the seasonal ice cover of Bohai Sea by all negative accumulated air temperature with <=-2 degrees C at 15 cm height above ice surface with R-2 = 0.9262 and 0.9044 in winter of 2003 and 2004.