黄海海洋对台风“灿鸿”外围过程响应的观测研究

2015年9月台风“灿鸿”经过黄海海域的QF111浮标,该浮标观测到黄海海洋的温度和流速响应。受台风影响,黄海海表温度有明显的下降,降温幅度在2~4°C,且在台风路径右侧形成了海表面温度低于20°C的低温斑块。流速的响应主要表现为台风过境期间流速增强,达1.2~1.5 m/s,呈现出全水深强化的特征。风一直对海洋有能量输入,且在台风过境期间风输入海洋的能量最大,旋转功率谱的分析结果表明台风输入海洋的能量向海洋内部传播。黄海海域由台风激发出的近惯性振荡衰减较快,近惯性振荡e折时间尺度约为2 d。

Study of the Yellow Sea responses to peripheral processes of Typhoon Chan-hom

In September 2015, Typhoon Chan-hom passed over the buoy named QF111 that can record the ocean temperature and current in the Yellow Sea. Affected by the typhoon, the drop of the sea surface temperatures is obvious, the cooling rate is in 2-4℃, and there formed low temperature patches below 20℃ at the right side of the typhoon path. The current increased during the transit of the typhoon, the velocity is up to 1.2-1.5 m/s,presenting the characteristics of reinforcement from the surface to the bottom. The result that wind did the work to the ocean indicates that wind always input the energy to the ocean, it reached the largest during typhoon transited, and the rotate power spectrum analysis results show that the energy from the wind spread to the ocean interior. The inertial oscillation inspired by the typhoon damp faster in the Yellow Sea, according to the evolution of the inertia horizontal kinetic energy, the e-folding time of the inertial oscillation is about two days.