The data-product consists of 4,081,174 temerature and salinity profiles, which were obtained by means of the bottle (Nansen) casts, CTD (Conductivity-Temperature-Depth profilers) and autonomous profiling floats. The World Ocean Database WOD2009 (update as of December 2010) (Boyer et al., 2009) served as a data basis. The first version of the data-product includes quality checked data at observed levels. Each T/S-profile can be identified via a unique ID number. For each profile the information on the ocean bottom depth is provided. The depths were taken from the high-resolution digital ocean bottom bathymetry (GEBCO). The data product is subdivided into 338 data files written in ASCII format. Each data file corresponds to a 0.5-degree geographical zone. The data can be read in using the FORTRAN program read_hydrodat.f .