Long-term observations of daily acoustic travel time along the SAMBA transect at PIES Mooring P4a (September 2021 – September 2023)

Here we present processed travel time from a Pressure-equipped Inverted Echo Sounder (PIES) located at a depth of 4672m at location P4a (34.4996°S; 12.9172°E) along the South Atlantic Meridional Overturning Circulation (MOC) Basin-scale Array (SAMBA) transect in the Cape Basin region of the South Atlantic Ocean, between 28 September 2021 and 20 September 2023. The South African component of the international South Atlantic Meridional Overturning Circulation project (SAMOC-SA) aims to characterise the time-mean and time-varying components of the SAMOC in the South Atlantic Ocean and monitor the variability of the main Southern Ocean frontal systems associated with the Antarctic Circumpolar Current (ACC), south of Africa.