Raw underway Thermosalinograph (TSG) observations from the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line cruise on the Algoa Voyage 253, October 2018

Here we present the 6-second resolution raw Thermosalinograph (TSG) data collected between 01 October and 16 October 2018 during the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) Monitoring Line cruise on the RS Algoa Voyage 253. A SeaBird SBE45 TSG is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C). The cruise operated from Slangkop, off Cape Town, westwards to 15° E, in the South Atlantic Ocean along the SAMBA transect. The objectives of the cruise were to recover an Acoustic Doppler Current Profiler (ADCP) mooring (M4) along the Integrated Ecosystem Programme (IEP)’s Scarborough Monitoring line to collect current data on the Benguela Jet Current; recover three tall moorings on the SAMBA transect (M8; M9 & M10), incorporating ADCP’s and Sea-Bird Microcats; complete 20 Conductivity, Temperature, Depth (CTD) full depth casts (using the containerised winch) along the SAMBA transect; undertake Chlorophyll and Oxygen sampling at CTD stations and underway along SAMBA transect; collect underway Thermosalinograph (TSG); Surface Photosynthetically Active Radiation (SPAR) and Ship-mounted Acoustic Doppler Current Profilers (S-ADCP) data and provide training to newly employed Department of Forestry, Fisheries and the Environment (DFFE) personnel and interns.

本报告呈现了2018年10月1日至10月16日期间，在RS Algoa航次253的南大西洋经向翻转环流全海域阵列（SAMBA）监测线上，采用6秒分辨率原始热盐电导仪（Thermosalinograph，简称TSG）所收集的数据。本研究利用SeaBird SBE45型TSG，在科研和监测航次中偶然性地收集近表面温度和电导率测量值。水体持续地从船体船体上的进水口被泵入TSG，观测数据与导航信息持续接口。靠近进水口处的温度传感器提供了进入水体的温度测量值（T1）。电导池内部水体的温度（T2）被用来从电导率测量值（C）中准确计算盐度（S）。航次从南非好望角附近的Slangkop向西至15°E，沿SAMBA横切线穿越南大西洋。航次的目标包括：从综合生态系统计划（Integrated Ecosystem Programme，简称IEP）的Scarborough监测线上回收声学多普勒流速剖面仪（Acoustic Doppler Current Profiler，简称ADCP）的锚泊设备（M4），以收集本格拉流（Benguela Jet Current）的流速数据；从SAMBA横切线上回收三个高塔锚泊设备（M8、M9和M10），其中包含ADCP和Sea-Bird Microcats；沿SAMBA横切线完成20次电导率、温度、深度（Conductivity, Temperature, Depth，简称CTD）的全深度投放（使用集装箱式绞车）；在CTD站点及SAMBA横切线沿线进行叶绿素和氧气采样；收集航次中的热盐电导仪（Thermosalinograph，简称TSG）数据；表面光合有效辐射（Surface Photosynthetically Active Radiation，简称SPAR）和船载声学多普勒流速剖面仪（Ship-mounted Acoustic Doppler Current Profilers，简称S-ADCP）数据，并为新聘用的林业、渔业和环境部（Department of Forestry, Fisheries and the Environment，简称DFFE）人员和实习生提供培训。