Processed outputs from a community based Lagrangian dispersal simulation in the Tropical Southwestern Atlantic

We used the Lagrangiandispersal modelling tool Ichthyop (Lett et al. 2008) to track particles representing numerical larvae passively transported by current velocity fields in the Tropical Southwestern Atlantic. In the simulations,15 categories of particles classifyed according to biological traits (planktonic life duration and spawning habitat) were defined. Simulations were run monthly from January 2009 to December 2017 (108 runs). The stud domain was split into 225 cells of similar area (Fig). In each run, 150 particles per cell were released randomly between the surface and 80 m depth, for a total of 33,750 particles. Their trajectories were then followed for 30 days and their locations recorded at 5, 15 and 30 days to represent the three categories of PLD (short, medium and long). The data are the processed outputs of the model indicanting the number of particles of each catergory that recruited in each cell in each month.

本研究采用拉格朗日弥散建模工具Ichthyop（Lett等，2008），追踪代表数值化幼体的粒子，这些粒子在西南热带大西洋的流场中被被动输运。模拟实验中，依据生物学特征（浮游生活时长与产卵生境）定义了15类粒子。模拟于2009年1月至2017年12月按月开展，共计完成108次运行。研究区域被划分为225个面积均等的单元格（见图）。每次运行中，每个单元格随机释放150个粒子，释放深度介于表层至80米之间，总释放粒子数达33750个。随后对粒子轨迹进行为期30天的追踪，并分别在第5、15、30天记录其位置，以对应浮游生活时长（Planktonic Life Duration, PLD）的三个类别：短、中、长。本数据集为模型经处理后的输出结果，记录了每月在每个单元格内成功定居的各类粒子的数量。