Long-term observations of daily bottom currents along the SAMBA transect at PIES Mooring P4 (September 2013 – August 2015)

Here we present processed northward and eastward velocity components from a 2000 khz Aanderaa Doppler Current Sensor (DCS) deployed at a depth of 4432m at location P4 (34.504°S; 15.002°E) along the South Atlantic MOC Basin-scale Array (SAMBA) transect in the Cape Basin region of the South Atlantic Ocean, between 07 September 2013 and 12 August 2015. 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.

本报告展示了在南非大西洋中脊区域南大西洋MOC（中洋脊）阵列（SAMBA）横穿线上的P4位置（34.504°S; 15.002°E），于2013年9月7日至2015年8月12日期间，由Aanderaa多普勒流速仪（DCS）测得的2000 kHz频率的向北和向东速度分量数据。国际南大西洋南北逆转流项目（SAMOC）的南非分支旨在对南大西洋中SAMOC的时间平均及变化成分进行描述，并监测与南极绕极流（ACC）相关的非洲南部主要南极海流锋面的变异性。