Numerical Simulation of Seasonal Variation of Temperature in the Bohai Sea

The 3-D hydrodynamic and water quality model-COHERENS model was used to simulate the annual cycle of the temperature in the Bohai Sea. The meteorological datas, including wind components at 10 m, air temperature, relative humidity, pressure, cloud cover and precipitation rate, were considered in the temperature model. In addition, tide and river discharge also played a dominant role in the seasonal variation of temperature. Compared with the monitoring date, it was found that the long term variation of temperature could be reasonably simulationed with COHERENS model. The thermohaline gradually emergs from spring, then the strenght of thermohaline reaches its maximum in summer. The bottom temperature exists asymmetric nuclear structure. Finally, the thermocline decreases and disappears in autumn.