The effect of tides on the basal-melting of an ice shelf: large-eddy simulations with a near-wall model
Here, we use a large-eddy simulation to model the ocean boundary layer beneath a melting ice shelf under conditions similar to the Larsen C site. The strongest observed tidal constituents are used to force a time-dependent current. A near-wall model with Monin-Obukhov similarity scaling calculates the melt rate at the ice base. A turbulent Ekman layer forms at the ice base and further away the flow is in geostrophic balance. The simulations show a mean melt rate consistent with observations and a developing stratification in temperature and salinity. We find that the tidal cycle is important in setting the instantaneous melt rate.