OzSET – Australian Surface Elevation Tables and Marker Horizon Data Collection

<p>The Australian Surface Elevation Table (OzSET) dataset comprises ongoing measurements of surface elevation change and sediment accretion at coastal wetland sites across continental Australia. Surface elevation is recorded using Rod Surface Elevation Tables (RSETs), which measure net vertical displacement of the sediment surface relative to a deep benchmark rod. Sediment accretion is independently quantified using Marker Horizon (MH) feldspar plots, from which sediment cores are extracted to measure new deposition above a known reference layer. Together, these paired measurements allow decomposition of surface elevation change into surface accretion and subsurface processes such as compaction and root growth — critical indicators of coastal wetland resilience to sea level rise. This release presents RSET pin height and MH accretion data from five sites in the Moreton Bay region, Queensland, with collection ongoing and planned extension to additional sites across continental Australia.</p>