Vertical deformation and residual altimeter systematic errors around continental Australia inferred from a Kalman-based approach

Abstract

HighlightsWe further developed a method to investigate time-variability of vertical land motion (VLM) and regionally-correlated altimeter systematic errors around Australia.Our approach confirms widespread subsidence of the Australian region, and this is not explained by glacial isostatic adjustment alone.We identified noise driven by likely different oceanographic signals between tide gauge and offshore locations as a limit to resolving time-variable VLM signals.The addition of non-reference missions improves spatial sampling and reduces the impact of differential oceanic signals.The average rate of absolute sea-level rise is higher than previously published estimates, suggesting an acceleration in sea-level.