Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 259, May 2019

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 20 May 2019 and 27 May 2019 collected during the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the RS Algoa Voyage 259. 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 programme is a multi-disciplinary, multi-institutional platform undertaking relevant science in the Southern Benguela; it also functions as a platform for collaboration and learning. All projects aim to develop an ecosystem indicator that can be used to effectively monitor and understand the Southern Benguela. These include physical, chemical, planktonic, microbial, seabird and benthic ecosystem indicators, used for ecosystem-based management.