When varying a particular slider, a projected sea level change is computed based on a best fit curve, which is based on the model results. The closest result is then looked up, and these values are used to modify the Florida and Antarctica model simulations.

This scenario is hypothetical, and by no means fully representative of all the processes involved in both the evolution of polar ice sheets, and the way sea level rises differently in various parts of the world. It does not for example account for local subsidence of the ground, flooding, erosion of the shorelines, glacial isostatic rebound, negative feedbacks from the atmosphere, etc. It is, however, meant to assess the sensitivity of local sea level rise to melting of polar regions.

• Antarctica mesh at resolution ranging from 20 to 60 km, split into 29 regions (27 regions as shown in Schlegel et al., 2018, plus Geographic Partition 4, which is divided into Pine Island Glacier, Thwaites Glacier, and the remaining area).
• Computation of SLR using volume above hydrostatic equilibrium and conversion to global mean sea level rise from global ocean surface area. New US coastline computed using simple comparison between surface height and new sea level.

On user interactions with the field sliders or PDF graph, the total sea level delta is estimated using a best fit curve to the sample data (field multipliers were plotted against total sea level data). Then, the sample with the total sea level delta closest to this estimate is retrieved. Each sample also includes the contribution of each of 29 Antarctic basins to the total sea level delta. Finally, these contributions are used to estimate the volumetric change as well as an appropriate height scale for each of the basins. The following pseudocode illustrates the procedure described above,

for (i = 0 to 29) {
    basinContribution ← retrieve from sample
    
    /**
     * Overall ice equivalent volume change for basin
     *
     * NOTE:
     *      - 361.9 Gt of ice to raise sea level by 1 mm
     *      - Antarctic ice density: 0.8964 Gt / km^3
     */
    basinVolumeDelta ← -basinContribution * 361.9 * Antarctic ice density; // km^3

    // Calculate height scale for basin
    basinHeightScales[i] ← basinVolumeDelta / basin surface area;
}

// Apply height scale to each vertex of mesh based on which basin it belongs to.
for (i = 0 to number of vertices in Antartica mesh) {
    surface[i] ← surface[i] + basinHeightScales[i];
}