10.18453/rosdok_id00002995 Lorenz, Marvin Marvin Lorenz http://d-nb.info/gnd/123157707X https://orcid.org/0000-0002-9853-7775 Universität Rostock 2020 530 Physics 2020 en http://purl.uni-rostock.de/rosdok/id00002995 urn:nbn:de:gbv:28-rosdok_id00002995-1 This thesis investigates the circulation and mixing of estuaries, particularly estuaries that are driven by surface buoyancy fluxes. A numerical model is used to perform a hind-cast simulation of the exchange flow of the Persian Gulf. The exchange flow of the Persian Gulf with the Indian Ocean is investigated and quantified by using a thermohaline framework. Furthermore, the salt mixing is analyzed which can be diagnosed from the properties of the exchange flow and the driving surface fluxes.