Eustatic sea level rise refers to the rate (mm/yr) at which the sea level of the world's oceans are changing.
It is a global value for all of the world's oceans.
Duration is the time scale that is being modeled for sea level rise.
Isostatic sea level rise refers to the rate (mm/yr) at which sea level is changing on a local scale due to increases or decreases in the height of the land due to glacial rebound and tectonic uplift/depression.
Uplift (negative values) counters the effects of eustatic sea level rise while subsistence (positive values) is additive to the eustatic sea level rise.
The default ecoregion-scale isostatic rates were derived from data in NOAA's Tides and Currents and Proshutinsky et al., 2004.