摘要
By using the reanalysis data, the impact of oceanic eddies and frontal wave on Kuroshio front to the east of Taiwan （KFETW） is studied. The result indicates that cold eddies （warm eddies） corresponding to the first baroclinic mode of Rossby wave can weaken （strengthen） the strength of the KFETW and narrow （widen） the width of this front. A frontal wave of the KFETW during January to February in 1991 is detected from the reanalysis data. And the trough （crest） of the frontal wave may weaken （strengthen） the strength of the KFETW and narrow （widen） the width and thickness of this front. It is found through the diagnostic analysis of the energy source of the frontal wave that the contribution of barotropic instability or that of baroclinic instability is more than that of Ketvin-Helmholtz （K-H） instability by 1 - 2 order of magnitude, and the contribution of the baroclinic instability is 5 times than that of the barotropic instability, thereby the frontal wave is basically driven by the baroclinic instability.
采用海洋再分析结果,研究了海洋涡旋和锋面波动对台湾以东黑潮锋的影响,结果表明,Rossby波第一斜压模态形成的冷涡(暖涡),减弱(增强)台湾以东黑潮温度锋强度,减小(加大)锋的宽度。在再分析结果中,捕获到1991年1—2月台湾以东的一次黑潮锋面波动。锋面波动的波槽(波脊)到达时,该温度锋强度减弱(增强),宽度和厚度减小(增大)。使用诊断公式,初步分析了该锋面波动的能量来源,发现正压不稳定的贡献与斜压不稳定的贡献比K-H不稳定大1～2个数量级,而斜压不稳定的贡献约为正压不稳定的5倍,因此该锋面波动基本上由斜压不稳定性提供能量。
