The Effect of High Frequency Strong Winds on Winter Circulation and Water Exchange in the Bohai Sea by ROMS
The regional ocean model ROMS and different time-resolution wind data provided by NCEP CFSR are used to simulate the wind-driven circulation and water exchange in the Bohai Sea.The results of numerical simulations driven by daily and monthly averaged wind fields separately show that daily-averaged wind fields with high frequency strong wind signals lead to an obvious enhanced wind-driven circulation,which makes a good agreement with the observations during winter.Strong winds in winter not only have a greater contribution to both intensity and pattern of the wind-driven circulation,but also significantly increase the heat exchange between the Bohai Sea and the Yellow Sea by controlling strong inflows and outflows through the Bohai Strait.The average residence time in the Bohai Sea becomes shorter under the forcing of strong winds,which can indicate the improvement of water exchange capacity.On the other hand,there are only weak seasonal signals identified in the experiment of monthly mean wind forcing.Thus it hints us that the frequency and intensity of winter strong winds may have an important role on the long-term changes of wind-driven circulation and water exchange in the Bohai Sea during winter.
国家科技期刊平台
NSTL
万方数据
维普
