Hypsometry: the relationship of glacier area to elevation.  

Orbital Forcings: otherwise known as Milankovitch Forcings, they are variations in Earth's orbital parameters that change the amount of incoming solar radiation.  

Process Based Models: A complex grid based model that simulates the physical processes in and between the atmosphere, ocean, land, and cryosphere.  

Radiative Forcing: Is defined as the change in net solar input (Wm^-2) at the tropopause after allowing for stratospheric temperatures to return to equilibrium.  

Representative Concentration Pathways (RCPs) are a set of GHG concentration pathways that would result in several different radiative forcing increases (relative to pre-industrial) by 2100 (+2.6, +4.5, +6.0, and +8.5 W/m2, respectively).  These 'concentration pathways' are used in models to generate future projections.  

Satellite Altimetry:  A satellite based instrument to measure surface topogrpahy using repeat laser measurements.  

Semi-Empirical Model (SEMs): SEMs are a method of projecting global mean sea level change by connecting it physically and thermodynamically to global mean temperature change.  

Thermal Expansion: ocean water lowers in density and increases in volume as temperature increases.  

Wave Habit: height, speed, and direction.