Mesoscale Eddy Trajectory Atlas META3.2 Delayed-Time all satellites

This dataset is composed of the trajectories and all associated parameters for the eddies detected with the py-eddy-tracker algorithm (Mason et al., 2014. DOI:10.1175/JTECH-D-14-00019.1) freely released under a GPL V3 license (https://github.com/AntSimi/py-eddy-tracker). The detection is made on maps of Absolute Dynamic Topography (ADT) computed with the maximum altimeter satellites available, the maps are distributed by the Copernicus Marine Service (https://marine.copernicus.eu, cf user manual for details). The maps are high-pass filtered with a half-power cutoff wavelenght of 700 km. The amplitude must be over 0.4 cm , the minimum number of grid points within a contour is 5 and the shape error must be below 70% on the raw effective contour. Note that the contour storage resampling may slightly change the provided error. The tracking is made through the overlap of the eddies. In case of multiple candidates, the eddy with the higher ratio overlap area over union area is associated to the trajectory. Trajectories are considered reliable when they last at least 10 days.

本数据集包含由py-eddy-tracker算法（Mason等，2014，DOI:10.1175/JTECH-D-14-00019.1）检测得到的海洋中尺度涡旋的轨迹及其所有关联参数，该算法以GPL V3协议开源发布（https://github.com/AntSimi/py-eddy-tracker）。本次涡旋检测基于当前可用的全部在轨高度计卫星数据计算得到的绝对动力地形（Absolute Dynamic Topography, ADT）场完成，该数据场由哥白尼海洋服务中心（Copernicus Marine Service）分发（https://marine.copernicus.eu，详细信息参见用户手册）。该地形场已进行高通滤波处理，半功率截止波长为700千米。涡旋检测需满足以下筛选条件：振幅大于0.4厘米，轮廓内最小网格点数为5，原始有效轮廓的形状误差低于70%。需注意，轮廓存储重采样操作可能会略微改变最终的误差值。涡旋轨迹的追踪通过涡旋间的重叠区域实现，若存在多个匹配候选，则选取重叠面积与并集面积比值更高的涡旋关联至对应轨迹。当轨迹持续时长不少于10天时，该轨迹将被判定为可靠轨迹。

搜集汇总

背景与挑战

背景概述

该数据集记录了通过py-eddy-tracker算法检测的中尺度涡旋轨迹及其参数，基于多卫星高度计数据生成，并设定了严格的检测和跟踪标准以确保数据质量。