西太平洋黑洞涡旋物质输运能力分析

基于椭圆型拉格朗日拟序结构（elliptic Lagrangian Coherent Structures, eLCSs）可以提取出黑洞涡旋，它具有较强的输运能力并且随流场长时间运动后仍保持连贯，类似于海洋中的“黑洞”，故被称为黑洞涡旋。本文基于地转流速度场数据，针对西太平洋中一个典型的黑洞涡旋（Eddy A）使用eLCSs的方法提取涡旋边界，并进行分析研究。利用海表温度、海表盐度和叶绿素浓度数据分析验证Eddy A水平方向上物质输运的连贯性；使用Argo浮标得到的不同深度的温度、盐度和溶解氧数据对Eddy A垂直方向的物质相干性进行分析验证。通过分析证明，在较长的时间尺度上，黑洞涡旋边界较欧拉涡旋边界的连贯性更强，能更加客观地描述物质输运。

Analysis of black-hole eddy on material transport in the western Pacific

Black-hole eddy can be extracted based on elliptic Lagrangian Coherent Structures (eLCSs), which can transport material and maintain coherent under geostrophic for a long time. It was similar to the black hole in the ocean, so it was called black-hole eddy. In this paper, the boundary of black-hole eddy was extracted based on the data of the geostrophic flow velocity field. Using the method of eLCSs and choosing a targeted eddy (Eddy A) in the western Pacific to analyze. Sea surface temperature, sea surface salinity and chlorophyll concentration data are used to verify that the Eddy A is coherent in horizontal material transport. The temperature, salinity and dissolved oxygen data obtained by Argo in different depths are used to prove the coherence in vertical of Eddy A. The result demonstrates that the boundary of black-hole eddy is more coherent than Eulerian boundary in a long time scale and can describe the transport of material more objectively.