Brief communication: The global signature of post-1900 land ice wastage on vertical land motion
- 1Department Geoscience and Remote Sensing, Delft University of Technology, Delft, 2618 CN, the Netherlands
- 2Surveying and Spatial Sciences, School of Land and Food, University of Tasmania, Hobart, Tasmania, Australia
- 3Institute of Geography, University of Bremen, Bremen, Germany
- 4Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, the Netherlands
Abstract. Melting glaciers, ice caps and ice sheets have made an important contribution to sea-level rise through the last century. Self-attraction and loading effects driven by shrinking ice masses cause a spatially varying redistribution of ocean waters that affects reconstructions of past sea level from sparse observations. We model the solid-earth response to ice mass changes and find significant vertical deformation signals over large continental areas. We show how deformation rates have been strongly varying through the last century, which implies that they should be properly modelled before interpreting and extrapolating recent observations of vertical land motion and sea-level change.