GlobSed is a new global 5‐arc‐minute total sediment thickness grid for the world's oceans and marginal seas. The grid covers a larger area than previously published global grids and
incorporates updates for the NE Atlantic, Arctic, Southern Ocean, and Mediterranean regions.
Straume, E. O., Gaina, C., Medvedev, S., Hochmuth, K., Gohl, K., Whittaker, J. M., et al. ( 2019). GlobSed: Updated total sediment thickness in the world's oceans. Geochemistry, Geophysics, Geosystems, 20. https://doi.org/10.1029/2018GC008115
Gridded oceanic crustal ages based on an improved database of magnetic anomaly identifications (modeled using the geomagnetic polarity timescale of Ogg 2012). The oceanic lithospheric age model builds on the Seton et al. (2012) global model and includes recent regional plate tectonic models of the African plate, Indian Ocean, NE Atlantic, and the Arctic (Gaina et al., 2013, 2015, 2017) and a revised, more detailed global model for Eocene age oceanic lithosphere (Gaina & Jakob, 2018). See Straume et al. (2019) for details.
The residual bathymetry is defined here as the difference between the predicted depth to basement according to thermal subsidence of normal oceanic lithosphere and the observed sediment unloaded basement depth. To compute the oceanic lithosphere thermal subsidence, we have used the formula of Crosby and McKenzie (2009). To calculate the sediment unloaded basement depth, we subtracted the sediment thickness from the present‐day bathymetry GEBCO_2014 (Weatherall et al., 2015) and applied the isostatic correction method of Sykes (1996).