IPCC Fourth Assessment Report: Climate Change 2007
Climate Change 2007: Working Group I: The Physical Science Basis

10.6.4 Ice Sheets

The mass of ice grounded on land in the Greenland and Antarctic Ice Sheets (see also Section 4.6.1) can change as a result of changes in surface mass balance (the sum of accumulation and ablation; Section or in the flux of ice crossing the grounding line, which is determined by the dynamics of the ice sheet (Section Surface mass balance and dynamics together both determine and are affected by the change in surface topography.