Abstract. The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort providing regular compilations of surface-to-bottom ocean biogeochemical bottle data, with an emphasis on seawater inorganic carbon chemistry and related variables determined through chemical analysis of seawater samples. GLODAPv2.2022 is an update of the previous version, GLODAPv2.2021 (Lauvset et al., 2021). The major changes are as follows: data from 96 new cruises were added, data coverage was extended until 2021, and for the first time we performed secondary quality control on all sulphur hexafluoride (SF₆) data. In addition, a number of changes were made to data included in GLODAPv2.2021. These changes affect specifically the SF₆ data, which are now subjected to secondary quality control, and carbon data measured onboard the RV Knorr in the Indian Ocean in 1994–1995 which are now adjusted using CRM measurements made at the time. GLODAPv2.2022 includes measurements from almost 1.4 million water samples from the global oceans collected on 1085 cruises. The data for the now 13 GLODAP core variables (salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon, total alkalinity, pH, CFC-11, CFC-12, CFC-113, CCl₄, and SF₆) have undergone extensive quality control with a focus on systematic evaluation of bias. The data are available in two formats: (i) as submitted by the data originator but converted to World Ocean Circulation Experiment (WOCE) exchange format and (ii) as a merged data product with adjustments applied to minimize bias. For the present annual update, adjustments for the 96 new cruises were derived by comparing those data with the data from the 989 quality controlled cruises in the GLODAPv2.2021 data product using crossover analysis. SF₆ data from all cruises were evaluated by comparison with CFC-12 data measured on the same cruises. For nutrients and ocean carbon dioxide (CO₂) chemistry comparisons to estimates based on empirical algorithms provided additional context for adjustment decisions. The adjustments that we applied are intended to remove potential biases from errors related to measurement, calibration, and data handling practices without removing known or likely time trends or variations in the variables evaluated. The compiled and adjusted data product is believed to be consistent to better than 0.005 in salinity, 1 % in oxygen, 2 % in nitrate, 2 % in silicate, 2 % in phosphate, 4 μmol kg^-1 in dissolved inorganic carbon, 4 μmol kg^-1 in total alkalinity, 0.01–0.02 in pH (depending on region), and 5 % in the halogenated transient tracers. The other variables included in the compilation, such as isotopic tracers and discrete CO₂ fugacity (fCO₂), were not subjected to bias comparison or adjustments. The original data, their documentation and DOI codes are available at the Ocean Carbon and Acidification Data System of NOAA NCEI (https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/GLODAPv2_2022/, last access: 15 August 2022). This site also provides access to the merged data product, which is provided as a single global file and as four regional ones – the Arctic, Atlantic, Indian, and Pacific oceans – under https://doi.org/10.25921/1f4w-0t92 (Lauvset et al., 2022). These bias-adjusted product files also include significant ancillary and approximated data, which were obtained by interpolation of, or calculation from, measured data. This living data update documents the GLODAPv2.2022 methods and provides a broad overview of the secondary quality control procedures and results.

中文翻译：

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GLODAPv2.2022：全球内海生物地球化学数据产品最新版本

摘要。全球海洋数据分析项目 (GLODAP) 是一项综合工作，定期汇编从地表到海底的海洋生物地球化学瓶数据，重点是海水无机碳化学和通过海水样本化学分析确定的相关变量。GLODAPv2.2022 是之前版本 GLODAPv2.2021 (Lauvset et al., 2021) 的更新。主要变化如下：增加了96条新航次的数据，数据覆盖范围延长至2021年，我们首次对所有六氟化硫（SF ₆）数据进行了二级质量控制。此外，对 GLODAPv2.2021 中包含的数据进行了一些更改。这些变化特别影响 SF ₆数据，现在接受二级质量控制，以及1994-1995 年在印度洋RV Knorr上测量的碳数据，现在使用当时的 CRM 测量值进行了调整。GLODAPv2.2022 包括来自全球海洋的近 140 万个水样的测量值，这些水样是在 1085 次航行中收集的。现在 13 个 GLODAP 核心变量的数据（盐度、氧气、硝酸盐、硅酸盐、磷酸盐、溶解的无机碳、总碱度、pH、CFC-11、CFC-12、CFC-113、CCl ₄和 SF ₆) 进行了广泛的质量控制，重点是对偏差的系统评估。数据有两种格式：(i) 由数据发起者提交，但转换为世界海洋环流实验 (WOCE) 交换格式；(ii) 作为合并数据产品，经过调整以尽量减少偏差。对于目前的年度更新，通过使用交叉分析将这些数据与 GLODAPv2.2021 数据产品中的 989 次质量控制巡航的数据进行比较，得出对 96 次新巡航的调整。通过与在相同航行中测量的 CFC-12 数据进行比较，评估了来自所有航行的SF _6数据。对于养分和海洋二氧化碳（CO ₂) 化学比较与基于经验算法的估计为调整决策提供了额外的背景。我们应用的调整旨在消除与测量、校准和数据处理实践相关的错误的潜在偏差，而不消除已知或可能的时间趋势或评估变量的变化。编译和调整的数据产品被认为与盐度 0.005、氧气 1%、硝酸盐 2%、硅酸盐 2%、磷酸盐 2%、溶解无机碳4 μmol kg ^-1、4 μmol kg ^-1的总碱度，0.01–0.02 的 pH 值（取决于地区）和 5 % 的卤化瞬态示踪剂。汇编中包含的其他变量，例如同位素示踪剂和离散 CO ₂逸度 ( f CO ₂)，未进行偏差比较或调整。原始数据、其文档和 DOI 代码可在 NOAA NCEI 的海洋碳和酸化数据系统 (https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/GLODAPv2_2022 /，最后一次访问：2022 年 8 月 15 日）。该站点还提供对合并数据产品的访问，该产品以单个全球文件和四个区域文件（北极、大西洋、印度洋和太平洋）的形式提供，位于 https://doi.org/10.25921/1f4w-0t92 （Lauvset 等人，2022 年）。这些经过偏差调整的产品文件还包括重要的辅助数据和近似数据，这些数据是通过对测量数据进行插值或计算得出的。此实时数据更新记录了 GLODAPv2。