排序方式： 共有3条查询结果，搜索用时 15 毫秒
1
1.
Two-dimensional tidal open boundary conditions of the M2 constituent in the Bohai and Yellow Seas(BYS) have been estimated by assimilating T/P altimeter data.During inversion,independent point(IP) strategy was used,in which several IPs on the open boundary is assumed,values at these IPs can be optimized with an adjoint method,and those at other grid points are determined by linearly interpolating the values at IPs.The reasonability and feasibility of the model are tested by ideal twin experiments.In the practical experiment(PE) after assimilation,the cost function may reach 1% or less of its initial value.Mean absolute errors in amplitude and phase can be less than 5 cm and 5°,respectively,and the obtained co-chart can show the character of the M2 constituent in the BYS.The results of the PE indicate that using only two IPs on the open boundary can yield better simulated results. 相似文献
2.
A nine-month mooring record was used to investigate seasonal variation and modal content of internal tides(ITs) on the continental slope in the northern South China Sea(SCS). Diurnal tides at this site show clear seasonal change with higher energy in winter than in spring and autumn, whereas semidiurnal tides show the opposite seasonal pattern. The consistency of ITs with barotropic tides within the Luzon Strait, which is the generation region of the ITs, implies that the seasonal variation of ITs depends on their astronomical forcing, even after extended propagation across the SCS basin. Diurnal tides also differ from semidiurnal tides in relation to modal content; they display signals of high modes while semidiurnal tides are dominated by low modes. Reflection of the diurnal tides on the continental slope serves as a reasonable explanation for their high modes. Both diurnal and semidiurnal tides are composed of a larger proportion of coherent components that have a regular 14-day spring-neap cycle. The coherent components are dominated by low modes and they show obvious seasonal variation, while the incoherent components are composed mainly of higher modes and they display intermittent characteristics. 相似文献
3.
近年来，研究表明全球部分海域的主要分潮存在季节变化。然而，由于使用传统调和分析方法时，分潮的选取受时间窗长度影响，因此难以准确分析潮汐的季节变化。本文结合长、短时间窗，提出“分步式”调和分析方法，通过理想实验和验潮站实际数据分析验证了该方法的准确性。将新方法与传统调和分析方法加以对比，发现无论潮汐是否存在季节变化，该方法都能更加准确地计算主要分潮各月的振幅和迟角。新方法不仅可用于分析验潮站水位数据，还可用于内潮平稳性和非平稳性特征的研究。 相似文献
1