OOI Global Irminger Sea Array CTD and Discrete Water Sampling Data from Mooring Overturning Cruises in the Irminger Sea from 2014-2023 (OOI Cruise Data project)

The hydrographic sampling performed by The NSF Ocean Observatories Initiative Coastal and Global Scale Nodes(OOI CGSN) as part of each Array turn represents a significant collection of valuable physical, chemical, and biological information. In addition to the CTD, collected hydrographic data include discrete oxygen, salinity, nutrient (nitrate, nitrite, silicate, phosphate, ammonium), chlorophyll, and carbon system measurements. These data serve several important functions. First, they are necessary for the calibration and evaluation of the moored instrumentation at each Array. Furthermore, the annual (Global) or biannual (Coastal) collection of data at the same locations provides a unique timeseries of a large set of water properties following established community standards and methods, independent of its association with the OOI moorings.

The analysis of collected water samples for the parameters listed above are performed by a number of outside labs on behalf of OOI-CGSN. Consequently, the water sampling data for a given cruise is distributed among a number of different files. The Discrete Sampling Summary integrates the related CTD, metadata, and discrete water sample data into a single file. Additionally, it synthesizes qualitative and quantitative information about the quality of a measurement into data quality flags for each associated parameter which follow WOCE-standards.

The final product is the Discrete Sampling Summary spreadsheet which contains the metadata, CTD data, and discrete water sample data into a single spreadsheet with data quality flags.

This dataset includes hydrographic data from the Global Irminger Sea Array located in the North Atlantic to the southeast of Greenland.This region experiences high winds and large surface waves, strong atmosphere-ocean exchanges of energy and gases, carbon dioxide sequestration, high biological productivity, and an important fishery. It is one of the few places on Earth with deep-water formation that feeds the large-scale thermohaline circulation.

美国国家科学基金会（National Science Foundation, NSF）海洋观测倡议沿海与全球尺度节点（OOI CGSN）在各阵列科考航次中开展的水文采样工作，收集了大量极具科研价值的物理、化学与生物学观测数据。除温盐深剖面仪（CTD）采集的数据外，本次水文采样还包含离散溶解氧、盐度、营养盐（硝酸盐、亚硝酸盐、硅酸盐、磷酸盐、铵盐）、叶绿素以及海洋碳系统相关测量数据。此类数据具备多项核心功能：其一，可用于校准与评估各阵列的锚系观测设备；其二，在相同站位按年度（全球阵列）或半年度（沿海阵列）开展的周期性数据采集，可生成一套遵循既定社区标准与研究方法的独特长时间序列水体属性数据集，且该数据集独立于OOI锚系设备本体存在。
针对上述所列参数的水样分析工作，由多家外部实验室代表OOI CGSN完成。因此，单次科考航次的水样采样数据会分散存储于多个不同文件中。离散采样汇总文件（Discrete Sampling Summary）将相关CTD数据、元数据以及离散水样数据整合至单个文件内。此外，该汇总文件还会将测量质量的定性与定量信息整合为各关联参数的数据质量标识，且严格遵循世界海洋环流实验（World Ocean Circulation Experiment, WOCE）标准。
最终产出的核心成果为离散采样汇总电子表格，该表格将元数据、CTD数据与离散水样数据整合为单个文件，并附带各参数对应的数据质量标识。
本数据集涵盖位于格陵兰岛东南部北大西洋海域的全球伊尔明格海阵列（Global Irminger Sea Array）的水文数据。该区域风力强劲、海面巨浪频发，存在强烈的大气-海洋能量与气体交换过程，同时具备二氧化碳封存、高生物生产力以及重要渔业资源等特征，是地球上少数几个可形成深层水并驱动大型热盐环流的区域之一。