21st-century changes in global ocean tides from model simulations

Data supplement for manuscript: Opel, L., Schindelegger, M., MacPherson, L., Vafeidis, A., Green, M., et al. (2025). Three drivers of 21st-century changes in ocean tides. Submitted to Journal of Geophysical Research: Oceans.

Contents:

We provide numerical model solutions for the present-day amplitude and future amplitude changes of four ocean tides (M2, S2, K1, O1) on a global 1/12° grid. Results pertain to the barotropic tide only. The amplitude changes are given relative to a year-2000 control run in decadal steps from 2050 through 2100. The modeled anomalies are associated with one of three driving processes:

STR: 21st-century increase in ocean stratification

SLR: Relative sea level rise (sterodynamic, barystatic, GIA-driven)

ICE: Thinning and retreat of Antarctic ice shelve

Future amplitudes changes are summarized in one file per driver and climate scenario. Both RCP4.5 and RCP8.5 are considered, but note that the RCP4.5 results for STR are interpolated from RCP8.5 solutions at 2040/2050/2060 and should therefore be treated with caution. The simulations for the effects of stratification were performed with a 3D setup of the MITgcm, while the SLR and ICE amplitudes are from a 2D shallow-water model, see Opel et al. (2025) for details.

File list: 

Control_M2_S2_K1_O1_future_barotropic_amplitude.nc (year-2000 control run)

STR_RCP45_M2_S2_K1_O1_future_barotropic_amplitude.nc

STR_RCP85_M2_S2_K1_O1_future_barotropic_amplitude.nc

SLR_RCP45_M2_S2_K1_O1_future_barotropic_amplitude.nc

SLR_RCP85_M2_S2_K1_O1_future_barotropic_amplitude.nc

ICE_RCP45_M2_S2_K1_O1_future_barotropic_amplitude.nc

ICE_RCP85_M2_S2_K1_O1_future_barotropic_amplitude.nc

Contact: M. Schindelegger ([e-mail])