Long-term observations of daily currents measured by DVS at SAMBA Mooring 9 (April 2017 - May 2018) ...

• Main Authors: Tarron Lamont, Marcel van den Berg
• Format: Dataset
• Language: English
• Published: Department of Forestry, Fisheries and the Environment 2020
• Subjects: -1522.0; -2622.0; m; Mean sea level; onGoing; license; oceans; South Atlantic Meridional Overturning Circulation SAMOC-SA; SOUTH ATLANTIC OCEAN; SAMBA transect; South Atlantic Ocean; Cape Basin; moorings; DVS; currents; WGS 84; textTable; Antarctic; Southern Ocean; The Antarctic; Antarc*
• Online Access: https://dx.doi.org/10.15493/dea.mims.26052091; https://api.odp.saeon.ac.za/catalog/MIMS/go/10.15493/DEA.MIMS.26052091

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. Here we present processed magnitude and direction of daily currents in the water column (1522 - 2622m) from Doppler Volume Sampler (DVS) instruments located at M9 (34.5011°S; 17.1395°E) along the South Atlantic MOC Basin-wide Array (SAMBA) transect in the Cape Basin region of the South Atlantic Ocean, between 11 April 2017 and 18 May 2018 ... : A subsurface-mounted, upward-looking, 2400 kHz RD Instruments Doppler Volume Samplers (DVS) were configured with a bin size of 0.8m and a blanking distance of 0.3m, and deployed in the water column ( 1522 - 2622m) at location M9 (34.5011°S; 17.1395°E), along the South Atlantic MOC Basin-scale Array (SAMBA) transect in the Cape Basin region of the South Atlantic Ocean. The instrument measured hourly magnitude and direction in the water column between 11 April 2017 and 18 may 2018. These hourly values were corrected for magnetic declination, and then averaged to daily means for each depth bin. Only hourly values which showed ≥ 75% good beam data were used, and daily values were only generated for days on which there were 75% or more hourly readings. The data were then formatted in a .txt file with data values separated by commas. ...