GPS?Observed Elastic Deformation Due to Surface Mass Balance Variability in the Southern Antarctic Peninsula

In Antarctica, Global Positioning System (GPS) vertical time series exhibit non-linear signals over a wide range of temporal scales. To explain these non-linearities, number hypotheses have been proposed, among them the short-term rapid solid Earth response to contemporaneous ice mass change. Here we use GPS reveal variations in surface balance (SMB) Southern Antarctic Peninsula (SAP). At four locations SAP show that interannual SMB anomalies cause measurable elastic deformation. We regional climate model products calculate induced displacement assuming perfectly Earth. Our results reduction misfit when fitting linear trend corrected for variations. imply that, better understanding glacial isostatic adjustment signal variability must be considered.