Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP: SB) on the Algoa Voyage 255, November 2018

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 20 November and 28 November 2018 during the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the RS Algoa Voyage 255. 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). This is a long-term monitoring line conducted off the coast of Kleinsee, Namaqualand, Elands/St Helena Bay and Scarborough on the west coast of South Africa. 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.

本项研究中，我们展示了于2018年11月20日至28日在南部本格拉综合生态系统计划（IEP:SB）的RS Algoa航次255期间，以6秒分辨率处理过的热盐计（Thermosalinograph, TSG）数据。采用SeaBird SBE45热盐计，在科研和监测航次中偶然收集了近表层温度和电导率测量数据。水从位于船体船壳的进水口持续泵送至TSG，观测数据与导航信息实时接口。靠近进水口的位置设有温度传感器，用以测量 incoming water的温度（T1）。通过测量电导率（C）并利用电导率细胞内的水温（T2）准确计算盐度（S）。这是一项长期监测线路，位于南非西海岸的小seen海岸、纳米比亚兰德、Elands/St Helena湾和Scarborough附近。2013年的IEP:SB项目整合了自1951年以来的长期、多十年时间序列信息，并持续以IEP:SB的形式进行监测。该计划是一个多学科、协作和能力建设的平台，承担相关科学任务，包括更新技术，旨在开发生态系统指标，这些指标可用于有效监测和理解南部本格拉地区。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，重点关注以下优先事项：海洋变暖、海洋酸化、营养功能、污染和水质量。该监测项目正在进行中。