EGU25 poster and plume video

This video shows a shallow open-ocean convective plume modelled using MITgcm.

My current model setup is based on the tutorial_deep_convection test case with the following modifications:

• Horizontal resolution: $20$ m
• Vertical resolution: Variable from $1$ m to $38$ m
• Domain: $150$ $\times$ $150$ $\times$ $50$ grid cells (i.e., $3$ km $\times$ $3$ km $\times$ $500$ m)
• Initialisation: Temperature and salt profile from mooring timeseries (September 13, 2021) with WOA September climatology used to fill above and below the mooring measurements; initial velocities are $0$ m/s in all directions
• Timestep: $3$ s
• Equation of state: TEOS-10
• Coriolis: $f_0=-1.358 \times 10^{-4}$, $\beta=8.194 \times 10^{-12}$
• Boundary conditions: no_slip_bottom and no_slip_sides are both .FALSE., with tracer relaxation using sponges 10 cells thick at the sides and 15 cells thick at the bottom
• Surface forcing: Salt flux of $0.03$ for $30$ hours (i.e., very high) and heat flux of -$5000$ W/m$^2$ for $70$ hours (i.e., extremely high, but also using…)
• Surface temperature limitation (i.e., allowFreezing=.TRUE.): Tfreezing=-2.05 (i.e., probably too low!)
• Non-hydrostatic solver: cg3dMaxIters=40
• Advection scheme: tempAdvScheme and saltAdvScheme are both $33$ and diffusivities are all $0$
• Viscosity: viscAh and viscAz are both $4 \times 10^{-2}$

There are still lots of improvements to be made, but this is my current best effort!

I made this video to accompany the following poster, which itself was made for the EGU General Assembly 2025.