南海海流对冬季风风应力的响应特征

RESPONSIVE PROPERTIES OF OCEANIC CURRENTS IN THE SOUTH CHINA SEA TO WIND STRESS OF WINTER MONSOON

本文用美国普林斯顿大学海洋模式（ＰＯＭ）的南海版本（ＳＣＳ－ＰＯＭ） 模拟了持续冬季风风应力作用下，南海海流的响应特征。结果表明，从静止的海洋 出发，定常冬季风风应力驱动下的南海海流有明显的时间变化，垂直积分后的海流 （全流）约需１２０天左右的时间，方能达到准稳定态，表层、次表层和深层海流的时 间演变也有类似特征。模拟结果还表明，ＳＣＳ－ＰＯＭ有能力模拟出南海边界流、沿 岸流和海流的涡旋状结构。

The South China Sea version(SCS-POM)of the U. S. Princeton University Ocean Model(POM)is used in simulations of the responsive properties of oceanic currents in the South China Sea (SCS)to the wind stress of winter monsoon. It is found that from the calm state of ocean the simulated ocean currents forced by the stationary wind stress of win- ter monsoon have evident time variations. The vertically integrated currents (total currents) need about 120 model days to reach a quasi-equilibrium state,the surface and the shallow- layer currents show the similar properties as well. It is also found that the SCS-POM has the capability to simulate the west boundary current,the coastal current and the eddy struc- true of the currents.