Nardini, PascalBöttinger, MichaelScheuermann, GerikSchmidt, MartinKarsten Rink and Ariane Middel and Dirk Zeckzer and Roxana Bujack2017-06-122017-06-122017978-3-03868-040-6http://dx.doi.org/10.2312/envirvis.20171099https://diglib.eg.org:443/handle/10.2312/envirvis20171099Due to the nutrient-rich water transported to the upper layer of the ocean, coastal upwelling systems are regions especially important for marine life and fishery. In this work, we focus on a visual analysis of the spatio-temporal structure of the Benguela upwelling system using pathline predicates. Based on the 3D flow field from an ocean model simulation, we first derive space- filling trajectories covering the full model grid. From these, we select and visualize pathlines related to upwelling. In a second step, we derive a 3D scalar field representing the pathline density, which is visualized using volume rendering techniques. Further analyses of the pathlines show a distinct annual cycle in the upwelling activity, which fits well to observation-based analyses found in literature.I.3.3 [Computer Graphics]Picture/Image GenerationLine and curve generation Computer Applications [J.2]Earth and atmospheric sciences10.2312/envirvis.2017109919-23