基于高分辨率高度计沿轨数据吕宋海峡亚中尺度过程季节波动分析

发布时间：2018-03-22 06:17

本文选题：物理海洋学　切入点：亚中尺度　出处：《应用海洋学学报》2016年04期 　论文类型：期刊论文

【摘要】：亚中尺度过程是指海洋流场罗斯贝数接近于1,空间尺度量级1km、时间尺度量级1d的动力学过程.根据高分辨率的Jason-2卫星高度计沿轨数据,采用改进的方差归一化方法,结合一维功率谱斜率分析,对南海吕宋海峡海域亚中尺度过程进行季节性统计,结果表明:吕宋海峡亚中尺度过程季节高发月份特性与相应的海平面异常波动特性较为一致性,较大的月份主要出现在秋冬季节,夏季波动相对较弱.结合当前研究和实例观测,冬季黑潮入侵和两侧"波动高能区"涡流波动是亚中尺度高发的诱因.
[Abstract]:The sub-mesoscale process refers to the dynamic process in which the ocean current field is close to 1, the spatial scale is 1km, and the time scale is 1d. According to the high resolution Jason-2 satellite altimeter orbit data, an improved variance normalization method is used. The seasonal statistics of the submesoscale processes in the Luzon Strait in the South China Sea are carried out based on the one-dimensional power spectral slope analysis. The results show that the seasonal high occurrence month characteristics of the sub-scale processes in the Luzon Strait are consistent with the corresponding sea level fluctuations. The larger months mainly occur in the autumn and winter seasons, but the summer fluctuations are relatively weak. Combined with current studies and practical observations, the Kuroshio invasion in winter and eddy-current fluctuations in the "fluctuating high energy zone" on both sides of the Kuroshio are the inducements for the high occurrence of submesoscale.
【作者单位】：清华大学深圳研究生院深圳市近海动力环境演变重点实验室;清华大学环境学院;武汉大学测绘学院;
【基金】：国家973计划资助项目(2014CB745002) 国家自然科学青年基金资助项目(41506130)
【分类号】：P731.2

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