Advanced Ocean Modelling: Using Open-Source Software

110 4 2.5D Vertical Slice ModellingFig. 4.10 Exercise 17: Distributions of the three Eulerian tracer fields after 24 hrs of simulationenriched bottom water from the stratified side of the front into the frontal zone asstimulus of biologic production.4.3.6 Additional Exercises for the ReaderRepeat this exercise with an initial density difference between the top and the bottomlayers of Δρ =2kgm −3 , which is twice that used before, and explore the featuresof the resultant tidal mixing front and associated flows.4.4 Coastal Upwelling4.4.1 BackgroundCoastal upwelling is a process by which colder and often nutrient-enriched water islifted closer the sea surface where increased light intensity promotes the productionof phytoplankton – a key trigger of the marine food chain.