南海海洋中尺度涡旋轨迹数据集（1993-2023年）

该数据集提供了多年逐日南海海洋中尺度涡旋轨迹信息，描绘了南海中尺度涡旋的时空变化规律，为进一步深入认识和理解南海多尺度动力过程等相关研究提供了可靠的基础数据。
数据集分为反气旋涡（anticyclonic eddy，AE）和气旋涡（cyclonic eddy，CE）两个大类。中尺度涡旋轨迹以年为单位、50组存储为一个数据单元，存储格式为netCDF4格式。每个netCDF文件包含至多50组涡旋轨迹，具体数目由“eddy_num”变量指示，涡旋轨迹由对应涡旋类型与组别数标识，每组包含变量“time”、“bound”、“center”、“radius”、“eke”、“amplitude”和“vorticity”，分别对应中尺度涡旋的存在时间、几何中心、平均半径、总的动能、平均振幅和总的涡度。以“eddy_infos_SCS_SEIA-AE_1993_01/AE_01/time”为例，其表示基于SEIA算法的南海1993年输出的第一个50组反气旋涡中第一个涡旋的存在时间。

This dataset provides multi-year daily trajectory data of mesoscale eddies in the South China Sea (SCS), and depicts the spatiotemporal variation patterns of mesoscale eddies in the SCS, offering reliable foundational data for further in-depth research on understanding multi-scale dynamic processes in the SCS and related studies.
The dataset is divided into two main categories: anticyclonic eddies (AE) and cyclonic eddies (CE).
Mesoscale eddy trajectories are stored in units of 50 groups per year as a single data chunk, with the storage format being netCDF4.
Each netCDF file contains up to 50 groups of eddy trajectories, with the exact number specified by the "eddy_num" variable. Eddy trajectories are identified by their corresponding eddy type and group number. Each group includes the variables "time", "bound", "center", "radius", "eke", "amplitude", and "vorticity", which respectively correspond to the existence time, geometric center, average radius, total kinetic energy, average amplitude, and total vorticity of the mesoscale eddy.
Take "eddy_infos_SCS_SEIA-AE_1993_01/AE_01/time" as an example: this path represents the existence time of the first eddy in the first batch of 50 anticyclonic eddies output for the SCS in 1993 based on the SEIA algorithm.

搜集汇总

背景与挑战

背景概述

该数据集提供了1993年至2023年南海海域的中尺度涡旋逐日轨迹信息，基于法国AVISO卫星观测数据和SEIA涡旋探测算法生成，具有0.25°的空间分辨率和1天的时间分辨率。数据集包含反气旋涡和气旋涡两类，以netCDF4格式存储，详细记录了涡旋的时间、几何中心、半径、动能等变量，为研究南海多尺度动力过程提供了可靠的基础数据。