Article révisé par les pairs
Résumé : Abstract. Estimating the contribution of marine ice sheets to sea-level rise iscomplicated by ice grounded below sea level that is replaced by ocean waterwhen melted. The common approach is to only consider the ice volume abovefloatation, defined as the volume of ice to be removed from an ice column tobecome afloat. With isostatic adjustment of the bedrock and externalsea-level forcing that is not a result of mass changes of the ice sheetunder consideration, this approach breaks down, because ice volume abovefloatation can be modified without actual changes in the sea-levelcontribution. We discuss a consistent and generalised approach forestimating the sea-level contribution from marine ice sheets.