分层热带海洋模式中的Rossby波和Kelvin波——初始混合层深度异常与大气热力强迫激发波动

Rossby Waves and Kelvin Waves in a Layered Tropical Numerical Ocean Model

利用一个两层半的热带海洋模式，采用数值实验的方法研究了热带海洋对于初始海洋混合层深度异常和大气季节内时间尺度热力强迫激发产生的Ｒｏｓｓｂｙ波和Ｋｅｌｖｉｎ波。研究表明，初始海洋混合层深度异常和大气热力强迫，可以在两层半热带海洋模式中激发产生东向传播具有Ｋｅｌｖｉｎ波性质的波动和具有Ｒｏｓｓｂｙ波性质的波动。热力强迫激发产生海洋Ｒｏｓｓｂｙ波和Ｋｅｌｖｉｎ波所需时间长于初始海洋混合层深度异常和大气季节内动力强迫激发产生两波所需时间，与大气季节内动力强迫激发的Ｒｏｓｓｂｙ波相比，初始深度异常与大气热力强迫激发产生Ｒｏｓｓｂｙ波具有不同的热力性质。

The response of tropical ocean to atmospheric thermal forcing at intraseasonal time scales is numerically studied in this paper. Rossby waves and Kelvin waves are generated in the model ocean. It is showed that in the 212 layer model the initial anomaly of oceanic mixed layer depth and the atmospheric thermal forcing both can generate Kelvin waves and Rossby waves but atmospheric thermal forcing needs a longer time for wave generation. Compared with waves generated by atmospheric dynamically forcing, the Rossby waves generated by thermal forcing have different thermal structure.