10.18453/rosdok_id00002882 Peng, Jen-Ping Jen-Ping Peng http://d-nb.info/gnd/1224760603 Universität Rostock 2020 550 Earth sciences 2020 en http://purl.uni-rostock.de/rosdok/id00002882 urn:nbn:de:gbv:28-rosdok_id00002882-8 Theory and numerical simulations suggested that submesoscale fronts and filaments are subject to various types of instabilities, providing a potentially important pathway for the downscale transport and dissipation of mesoscale kinetic energy in the ocean. Based on the observational data collected from the Benguela upwelling system, this thesis, for the first time, provided direct evidence for the detailed structure of turbulence triggered by forced/unforced/inertial symmetric instability and marginal shear instability in submesoscale fronts.