Underway temperature and salinity data was collected along the cruise track with two autonomous measurement systems, called self-cleaning monitoring boxes (SMBs). Usually the active (measuring) and passive (cleaning) systems are swapped every 12 hours. While temperature is taken at the water inlet in about 4 m depth, salinity is derived from conductivity and interior temperature within the SMB. Salinity was calibrated for each box independently against discrete water samples (see additional attachment). Temperature calibration was performed against CTD data. For details to all processing steps see Data Processing Report.

Salinity Offset SMB_A = 0.014113Salinity Offset SMB_B = 0.017165Temperature Offset T1 = 0.000558Temperature Offset T2 = 0.015546