Western and Central Pacific Fisheries Commission Wcpfc–sc1 Seapodym on a Mixed-resolution Spatial Scale Seapodym on a Mixed-resolution Spatial Scale
Western and Central Pacific Fisheries Commission Wcpfc–sc1 Seapodym on a Mixed-resolution Spatial Scale Seapodym on a Mixed-resolution Spatial Scale
复制标题
中西部太平洋渔业委员会 Wcpfc–sc1 混合分辨率空间尺度上的 Seapodym 混合分辨率空间尺度上的 Seapodym
DOI：
--
复制
发表时间：
--
期刊：
影响因子：
--
通讯作者：
R. Murtugudde
中科院分区：
文献类型：
--
作者：
I. Senina;P. Lehodey;I. Senina;J. Sibert;R. Murtugudde
基于对流-扩散-反应方程建立了金枪鱼种群空间结构的生态系统与种群动力学模型（SEAPODYM）。网格的非规则性由分析拉伸函数限定，这允许在特定区域生成网格节点浓度，并提高用于数值求解PDE的算法的精度。在数值格式中，通过拉伸函数的导数作为网格度量，考虑了向正交或非正交网格的变换。使用这种方法，节点的数量以及数值计算的成本与在均匀网格上工作的模型保持相同。开发了一个网格生成的计算机工具。它允许建立任意深度的陆地掩模，并将模型使用的数据传输到设计的网格上。进行了数值模拟，以测试如何更精细的网格分辨率在环境数据或鱼类生物量的变化很大的地区可以改善模拟结果的鲣鱼种群。建立了黑潮延伸区高分辨率的两个混合分辨率网格
A spatial ecosystem and population dynamics model (SEAPODYM) for simulating spatial structure of tuna species based on advection-diffusion-reaction equations was implemented with mixed-resolution grid. Non-regularity of the grid is circumscribed by analytical stretching functions, which allow generation of grid node concentrations in particular regions and enhance the accuracy of the algorithm used to numerically solve PDE's. Transformation to orthogonal or non-orthogonal grids is taken into account in the numerical scheme by derivatives of the stretching functions as a grid metrics. With this approach, the number of nodes as well as the cost for numerical computations remain the same as for the model working on uniform grid. A computer tool for grid generation was developed. It allows building of land masks for arbitrary depth and transfer data utilized by the model onto designed grids. Numerical simulations were performed to test how finer grid resolution in areas of large variations in environmental data or fish biomass can improve the results of simulations for population of skipjack. Two mixed-resolution grids were created-with higher resolution in Kuroshio extension