GLODAPv2.2020 – the second update of GLODAPv2
GLODAPv2.2020 – the second update of GLODAPv2
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GLODAPv2.2020 – GLODAPv2 的第二次更新
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
R. Woosley
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文献类型：
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作者：
A. Olsen;N. Lange;R. Key;T. Tanhua;H. Bittig;A. Kozyr;M. Álvarez;K. Azetsu;S. Becker;P. Brown;B. Carter;Letícia Cotrim da Cunha;R. Feely;S. V. van Heuven;M. Hoppema;M. Ishii;E. Jeansson;S. Jutterström;C. Landa;S. Lauvset;Patrick Michaelis;A. Murata;F. F. Pérèz;B. Pfeil;C. Schirnick;R. Steinfeldt;Toru Suzuki;B. Tilbrook;A. Velo;R. Wanninkhof;R. Woosley
抽象。全球海洋数据分析项目是一项综合工作，定期汇编从表层到底层的海洋生物地球化学数据，重点是海水无机碳化学和通过对水样进行化学分析确定的相关变量。GLODAPv2.2020是上一版本GLODAPv2.2019的更新。主要变化是：增加了106次巡航的数据，将覆盖时间延长至2019年，并将现有的离散CO2逸度（fCO 2）值纳入合并的产品文件。GLODAPv2.2020包括从946次巡航中收集的全球海洋120多万个水样的测量结果。12个GLODAP核心变量（盐度、氧、硝酸盐、硅酸盐、磷酸盐、溶解无机碳、总碱度、pH值、CFC-11、CFC-12、CFC-113和CCl 4）的数据经过了广泛的质量控制，特别是对偏差进行了系统评价。数据有两种格式：（i）由数据来源提交，但更新为世界海洋环流实验交换格式;（ii）作为合并数据产品，并进行调整，以最大限度地减少偏差。这些调整是通过将106次新航行的数据与GLODAP v2.2019数据产品的840次质量控制航行的数据进行比较得出的。它们校正与测量、校准和数据处理实践相关的错误，同时考虑到所评估变量的任何已知或可能的时间趋势或变化。经编译和调整后的数据产品被认为是一致的，盐度优于0.005，氧1%，硝酸盐2%，硅酸盐2%，磷酸盐2%，溶解无机碳4 μ mol kg − 1，总碱度4 μ mol kg −1，pH值0.01-0.02，取决于区域，卤化瞬态示踪剂5%。汇编中包括的其他变量，如同位素示踪剂和离散fCO 2，未进行偏倚比较或调整。原始数据，其文档和doi代码可在NOAA NCEI的海洋碳数据系统（https://www.nodc.noaa.gov/ocads/oceans/GLODAPv2_2020/，最后访问日期：2020年6月22日）上获得。该网站还提供了对合并数据产品的访问，该产品作为一个全球文件和四个区域文件-北极，大西洋，印度洋和太平洋-在https://doi.org/10.25921/2c8h-sa89下提供（Olsen等人，2020年）。偏差校正产品文件还包括重要的辅助和近似数据。这些是通过测量数据的插值或计算获得的。本次实时数据更新记录了GLODAP v2.2020方法，并提供了二级质量控制程序和结果的广泛概述。
Abstract. The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort providing regular compilations of surface to bottom ocean biogeochemical data, with an emphasis on seawater inorganic carbon chemistry and related variables determined through chemical analysis of water samples. GLODAPv2.2020 is an update of the previous version, GLODAPv2.2019. The major changes are: data from 106 more cruises added, extension of time coverage until 2019, and the inclusion of available discrete fugacity of CO2 (fCO2) values in the merged product files. GLODAPv2.2020 includes measurements from more than 1.2 million water samples from the global oceans collected on 946 cruises. The data for the 12 GLODAP core variables (salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon, total alkalinity, pH, CFC-11, CFC-12, CFC-113, and CCl4) have undergone extensive quality control, especially systematic evaluation of bias. The data are available in two formats: (i) as submitted by the data originator but updated to WOCE exchange format and (ii) as a merged data product with adjustments applied to minimize bias. These adjustments were derived by comparing the data from the 106 new cruises with the data from the 840 quality-controlled cruises of the GLODAPv2.2019 data product. They correct for errors related to measurement, calibration, and data handling practices, while taking into account any 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, depending on region, in pH, and 5 % in the halogenated transient tracers. The other variables included in the compilation, such as isotopic tracers and discrete fCO2 were not subjected to bias comparison or adjustments. The original data, their documentation and doi codes are available at the Ocean Carbon Data System of NOAA NCEI ( https://www.nodc.noaa.gov/ocads/oceans/GLODAPv2_2020/ , last access: 22 June 2020). 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/10.25921/2c8h-sa89 (Olsen et al., 2020). The bias corrected product files also include significant ancillary and approximated data. These were obtained by interpolation of, or calculation from, measured data. This living data update documents the GLODAPv2.2020 methods and provides a broad overview of the secondary quality control procedures and results.
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