Raw physical oceanography data was acquired by a ship-based Seabird SBE911plus CTD-Rosette system onboard RV POLARSTERN during research cruise PS132. The CTD was equipped with duplicate sensors for temperature (SBE3plus) and conductivity (SBE4). Additional sensors such as an oxygen sensor (SBE43), a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer (FLRTD) and an altimeter (Teledyne Benthos PSA-916) were mounted to the CTD. During this cruise issues with the ECO-AFL fluorometer and the C-Star transmissometer were faced. Cables and sensors were changed several times but the issue remained. Chlorophyll as well as beam transmission values should be treated with extreme care. The data was recorded using pre-cruise calibration coefficients (possibly wrong coefficients for the ECO-AFL fluorometer and the C-Star transmissometer). No correction, post-cruise calibration or quality control was applied. Text files containing bottle-Data were created using SBEDataProcessing steps "Data Conversion" and "Bottle Summary" without applying any correction.

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