Biogeochemistry measurements from discrete underway samples collected during cruise GLICE in Disko Bay, RV Sanna, August 2022@en

Cruise GLICE was conducted on RV Sanna in Disko Bay in August 2022. Throughout the cruise, a towfish was towed alongside the vessel at approximately 1-2 m depth allowing a clean supply of seawater to be pumped into the wet lab. Discrete samples were collected from this underway flow at regular intervals using a laminar flow hood to maintain trace metal clean conditions. Additionally, a separate underway supply was passed through a sensor box to provide underway salinity, temperature, chlorophyll and turbidity measurements (YSI EXO1). Trace metal samples were filtered and acidified at sea, then returned to GEOMAR for analysis after offline preconcentration using a seaFAST system. Nutrient samples were filtered and frozen at sea, then returned to GEOMAR via analysis via an autoanalyzer.2022年8月，GLICE航次（Cruise GLICE）在迪斯科湾（Disko Bay）的RV Sanna号科考船上实施科考作业。本航次全程以约1-2米水深沿船舷拖曳拖鱼（towfish），可为湿实验室（wet lab）提供清洁的海水补给。研究人员借助层流罩（laminar flow hood）维持痕量金属（trace metal）洁净环境，定期从该走航水流中采集离散样品。此外，另有一路走航供水流经传感器箱（sensor box），用于开展盐度、温度、叶绿素与浊度的走航监测，所用设备为YSI EXO1。痕量金属样品在海上完成过滤与酸化处理，随后通过seaFAST系统（seaFAST system）完成离线预富集，再送回GEOMAR进行分析。营养盐样品在海上完成过滤与冷冻保存，随后送回GEOMAR，采用自动分析仪（autoanalyzer）完成分析。