BSIOM Baltic Sea-Ice Ocean Model 1950-2022

• Main Authors: Lehmann, Andreas, GEOMAR Helmholtz Centre for Ocean Research Kiel
• Format: Other/Unknown Material
• Language: English
• Published: Zenodo 2024
• Subjects: Baltic Sea; climate variability; salinity dynamics; temperature; heatwaves; hypoxia; circulation; Sea ice
• Online Access: https://doi.org/10.5281/zenodo.11552398

Daily temperature, dissolved oxygen and salinity concentration data from the Baltic Sea Ice Ocean Model (BSIOM) from 1950 to 2022. A detailed description of the equations and modifications made, necessary to adapt the model to the Baltic Sea, can be found in Lehmann et al. (see references below). The model is forced realistically using the ERA5 global re-analysis in the preliminary extension version back to 1950. The resolution of the original output from BSIOM is specified with vertical 60 levels, which enables to resolve the upper 100m by layers of 3 m thickness. The horizontal resolution of the model is 2.5km. The datasets here presented are divided into surface and bottom files. We calculated the sea surface temperature (SST) using the average values from the first three depth layers (upper nine meters), while the sea bottom temperature (SBT) was the average of the last three depth layers following the bathymetry of the Western Baltic Sea (lower nine meters). The values for dissolved oxygen and salinity concentration were calculated in the same manner. The data is spatially constrained to the area between 9° 45’ to 14° 45’ East and 53° 53’ to 56° 30’ North. In the datasets, the following data is available: Lat: latitude values in degrees (°) Long: longitude values in degrees (°) Depth: depth values (m). The surface file shows a constant value of 1.5, while the bottom file shows the maximum depth (m) for that pixel. To show the depth in reference to the sea-level reference (0 meters) the values should be multiplied by -1. temp: temperature (°C) SO: salinity (g/kg) O2: dissolved oxygen (ml/L-1) t: day of the year (YYYY-MM-DD) LongLat: string with the combination of longitute and latitude values (only for the bottom file) GridID: identification value for each set of coordinates (Long and Lat)