Processed underway Thermosalinograph (TSG) observations from the Algoa Voyage 254, November 2018

Here we present the 6-second resolution processed thermosalinograph (TSG) data collected, between 01 November and 14 November 2018, during Voyage 254 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (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 West Coast Whale Cruise was conducted on the Algoa Voyage 254 between 1 and 14 November 2018. The cruise operated between the shelf, slope and offshore regions (<2000m depth) off the west coast of South Africa, between Cape Point (-34.36.111, 18.38064) and Groenriviermond (-30.8277, 17.52061). This cruise was undertaken for data collection as part of a collaborative project led by the Department of Environmental Affairs (DEA) in collaboration with the Whale Unit, Mammal Research Institute of the University of Pretoria, Department of Agriculture, Forestry and Fisheries (DAFF), National Oceanic and Atmospheric Administration (USA), Aqualie Institute (Brazil) and Oregon State University (USA). The greater programme is titled 'Large whale research - genetic relatedness, stock identification, abundance, feeding and migratory behaviours' and has two components, the east coast and west coast components. This cruise focused on the west coast humpback whales.

本篇报告展示了在2018年11月1日至11月14日期间，于RS Algoa号第254航次期间收集的6秒分辨率处理后的热盐盐度计（TSG）数据。在此次航行中，SeaBird SBE45热盐盐度计（TSG）被用以在研究及监测巡航中偶然收集近表面温度和电导率测量值。水体持续地从位于船体舯部的进水口被泵送至TSG，观测数据则持续与导航信息进行接口对接。一个靠近进水口的温度传感器提供了 incoming water（T1）的温度测量值。通过电导率测量值（C）准确计算水在电导池内（T2）的温度，以得出盐度（S）。2018年11月1日至14日，在Algoa号第254航次期间实施了西海岸鲸鱼巡航。此次巡航在南非洲西海岸的陆架、斜坡及离岸区域（<2000米深度）之间进行，跨越从开普角（-34.36.111，18.38064）至Groenriviermond（-30.8277，17.52061）。此次巡航作为由环境事务部（DEA）主导，并与比勒陀利亚大学哺乳动物研究学院鲸鱼单位、农业、林业与渔业部（DAFF）、美国国家海洋和大气管理局（NOAA）、巴西Aqualie研究所以及美国俄勒冈州立大学共同参与的合作项目的一部分而进行。该更大规模的项目命名为‘大型鲸鱼研究——遗传相关性、种群鉴定、丰度、摄食及迁徙行为’，并分为东海岸和西海岸两个部分。此次巡航的焦点为西海岸座头鲸。