Surface Elevation Table and Marker Horizon Measurements Along the Pacific Coast (ver. 2.0, June 2025)

Surface elevation table and marker horizon (SET-MH) plots were installed at multiple marshes along the Pacific coast beginning in 2012. They are used to measure millimeters of change in marsh elevation and accretion over time. This dataset includes SET pin height to measure elevation change and associated feldspar marker horizon depth to measure surface accretion spanning the Pacific coast. Individual pin height and feldspar depth measurements should not be treated as independent values. SET-MH mean and standard error calculations are provided for every site and date.

These data support the following publication:
Thorne, K.M., Bristow, M.L., Rankin, L.L., Kovalenko, K.E., Neville, J.A., Freeman, C.M. and Guntenspergen, G.R., 2024. Understanding marsh elevation and accretion processes and vulnerability to rising sea levels across climatic and geomorphic gradients in California, USA. Estuaries and Coasts, 47(7), pp.1972-1992. https://doi.org/10.1007/s12237-023-01298-4.