Advanced Ocean Modelling: Using Open-Source Software

124 4 2.5D Vertical Slice ModellingFig. 4.23 Exercise 19. Scenario 3. Distributions of (top panel) sea-level elevation, (middle panel)density field, and (bottom panel) v-component of velocity after 30 days of simulation. Black linesare density contoursThis example illustrates the subtle way by which the ocean responds to windforcing. Equatorial countercurrents are an example of such exotic wind-drivengeostrophic flows.4.6.7 Additional Exercises for the ReaderRepeat Scenario 1 of this exercise with a longer simulation time to explore whetherthe pycnocline can outcrop at the sea surface, and if so, how this modifies thedynamics. Repeat Scenario 3 of this exercise with the settings of τ o = −0.1Paand τ 1 = 0.05 Pa in Eq. (4.25) and identify regions in which the geostrophic flowruns opposite to the wind direction.