Title Raw PIES and current data for long-term observations of acoustic travel time (tau); bottom pressure and currents along the SAMBA transect at PIES P3 (October 2019 - October 2021)
Project South Atlantic Meridional Overturning Circulation (SAMOC-SA)
Authors

Sabrina Speich
Ecole Normale Supérieure (ENS) Laboratoire de Météorologie Dynamique (LMD); role: Marine Scientist; contact details: email: sabrina.speich@lmd.ens.fr

Tarron Lamont
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientist; contact details: email: tlamont@dffe.gov.za

Marcel van den Berg
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientific Technician; contact details: email: mvdberg@dffe.gov.za

Gavin Louw
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientific Technician; contact details: email: glouw@dffe.gov.za

Chris Meinen
Atlantic Oceanographic and Meteorological Laboratory (AOML); role: Marine Scientist; contact details: email: chris.meinen@gmail.com

Rigoberto Garcia
Atlantic Oceanographic and Meteorological Laboratory (AOML); role: Marine Scientist; contact details: email: Rigoberto.Garcia@noaa.gov

Renellys Perez
Atlantic Oceanographic and Meteorological Laboratory (AOML); role: Marine Scientist; contact details: email: Renellys.C.Perez@noaa.gov

Shenfu Dong
Atlantic Oceanographic and Meteorological Laboratory (AOML); role: Marine Scientist; contact details: email: Shenfu.Dong@noaa.gov

Publisher Department of Forestry, Fisheries and the Environment (2023)
Contributors

Contact Person: Gavin Louw
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientific Technician; contact details: email: mrgavinl@gmail.com

Abstract Here we present raw bottom pressure and acoustic travel time data from a Pressure-equipped Inverted Echo Sounder (PIES) located at a depth of 3000m at location P3 (34.499°S; 17.135°E) along the South Atlantic MOC Basin-scale Array (SAMBA) transect in the Cape Basin region of the South Atlantic Ocean, between 14 October 2019 and 02 October 2021. The instrument was equipped with an additional 2000 khz Aanderaa Doppler Current Sensor (DCS) deployed at a depth of 2950m. In addition, both the PIES and the DSC were equipped with internal temperature sensors. 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.
Methods A bottom-mounted, upward-looking, Pressure-equipped Inverted Echo Sounder (PIES) was deployed at a depth of 3000m at location P3 (34.499°S; 17.135°E) along the South Atlantic MOC Basin-scale Array (SAMBA) transect in the Cape Basin region of the South Atlantic Ocean. The instrument was set up to measure acoustic travel time (Tau) at 4 pings every 10 minutes, which were then internally averaged to save and output one Tau value per hour. Bottom pressure was recorded every 20 minutes, and then internally averaged to save and output one pressure value per hour. Tau and bottom pressure were recorded between 14 October 2019 and 02 October 2021. The instrument was equipped with an additional 2000 khz Aanderaa Doppler Current Sensor (DCS) deployed at a depth of 2950m, and set up to measure hourly current speed and direction. In addition, both the PIES and the DCS were equipped with internal temperature sensors.
Data
Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
Temporal extent 14 Oct 2019 – 02 Oct 2021
Geographic extent

Cape Basin, South Atlantic Ocean

North: -34.498
South: -34.499
West: 17.135
East: 17.136

Vertical extent Max: -2950 m
Min: -2950 m
Keywords currents, moorings, physical oceanography, PIES, Pressure-equipped Inverted Echo Sounder, SAMBA transect, SOUTH ATLANTIC OCEAN
Related resources
  • This digital object continues 10.17882/70364
  • This digital object is part of Long-term moored observations from the eastern part of the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) (10.15493/DEA.MIMS.26052050)
  • This digital object is previous version of Long-term observations of daily acoustic travel time along the SAMBA transect at PIES Mooring P3 (October 2019 – October 2021) (10.15493/DEA.MIMS.07982023)
  • This digital object is previous version of Long-term observations of daily bottom currents along the SAMBA transect at PIES Mooring P3 (October 2019 – October 2021) (10.15493/DEA.MIMS.08162023)