Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) cruise on the Algoa Voyage 272, May 2021

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 14 May and 21 May 2021 during the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) cruise on the Algoa Voyage 272. 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 IEP:SB in 2013 consolidated a long-term, multi-decadal time-series (from 1951 onward) of information for this important region and has continued monitoring in the form of the IEP:SB. The programme is a multi-disciplinary, collaborative and capacity building platform undertaking relevant science, including updating technology, with the aim to develop ecosystem indicators that can be used to effectively monitor and understand the Southern Benguela. These include physical, chemical, planktonic, microbial, seabird, marine mammal, benthic and pollution (plastic) ecosystem indicators as required by ecosystem-based management regarding the following priorities: ocean warming, ocean acidification, trophic functioning, pollution and water quality. It is on-going monitoring programme.

本报告呈现了在2021年5月14日至21日期间，于‘阿尔戈阿’航行272次期间，在综合生态系统计划：南方本格拉（IEP:SB）巡航中，采用6秒分辨率处理的Thermosalinograph（TSG）数据。SeaBird SBE45型TSG被用于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。水体从位于船体船壳内的吸入口持续泵送到TSG，观测数据与导航信息持续进行交互。靠近吸入口的温度传感器提供了进入水体的温度测量值（T1）。通过电导率测量值（C）精确计算水体内部电导池的温度（T2），从而得出盐度（S）。2013年，IEP:SB项目整合了自1951年以来的长期、跨数十年的时间序列信息（数据），并持续进行监测，形式为IEP:SB。该计划是一个多学科、协作及能力建设平台，承担相关科学研究，包括更新技术，旨在开发可被用于有效监测和理解南方本格拉生态系统的生态系统指标。这些指标包括物理、化学、浮游生物、微生物、海鸟、海洋哺乳动物、海底和污染（塑料）生态系统指标，以满足基于生态系统的管理要求，涉及以下优先事项：海洋变暖、海洋酸化、营养功能、污染及水质。此为一项持续监测项目。