GLODAPv2.2019-an update of GLODAPv2
GLODAPv2.2019-an update of GLODAPv2
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DOI：
10.5194/essd-11-1437-2019
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发表时间：
2019-09-25
影响因子：
11.4
通讯作者：
Wanninkhof, Rik
中科院分区：
文献类型：
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作者：
Olsen, Are;Lange, Nico;Wanninkhof, Rik
全球海洋数据分析项目（GLODAP）是一项综合性工作，提供从表面到底部海洋生物地球化学数据的定期汇编，重点是海水无机碳化学和通过水样化学分析确定的相关变量。GLODAPv2 v2.2019的更新在之前版本的基础上增加了116次游轮的数据，将其覆盖范围从2013年扩展到2017年，同时还增加了前几年的一些数据。GLODAPv2.2019包括从840次巡航中收集的全球海洋110多万个水样的测量结果。GLODAP岩心的12个变量（盐度、氧、硝酸盐、硅酸盐、磷酸盐、溶解无机碳、总碱度、pH、CFC-11、CFC-12、CFC-113和CCl4）的数据经过了广泛的质量控制，特别是系统性的偏差评估。数据以两种格式提供：(i)由数据发起者提交，但更新为WOCE交换格式；（ii）作为合并数据产品，并进行调整以尽量减少偏差。这些调整是通过将116次新巡航的数据与GLODAPv2数据产品的724次质量控制巡航的数据进行比较得出的。他们纠正与测量、校准和数据处理实践有关的错误，同时考虑到任何已知或可能的时间趋势或变化。经整理调整后的数据产品，盐度、氧气、硝酸盐、硅酸盐、磷酸盐、溶解无机碳4 μ mol kg（-1）、总碱度4 μ mol kg（-1）、pH值0.01 ~ 0.02、卤化瞬态示踪剂5%均优于0.005。该汇编还包括其他几个变量的数据，例如同位素示踪剂。这些数据没有进行偏倚比较或调整。原始数据、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_2019/，最后一次访问：2019年9月17日）中获得。该网站还提供对合并数据产品的访问，该数据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）的形式在https://doi.org/10.25921/xnme-wr20下提供（Olsen et al., 2019）。产品文件还包括重要的辅助和近似数据。这些是通过对测量数据的插值或计算得到的。本文记录了GLODAPv2.2019方法，并提供了二级质量控制程序和结果的广泛概述。
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. This update of GLODAPv2, v2.2019, adds data from 116 cruises to the previous version, extending its coverage in time from 2013 to 2017, while also adding some data from prior years. GLODAPv2.2019 includes measurements from more than 1.1 million water samples from the global oceans collected on 840 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 116 new cruises with the data from the 724 quality-controlled cruises of the GLODAPv2 data product. They correct for errors related to measurement, calibration, and data handling practices, taking into account any known or likely time trends or variations. 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 mu mol kg(-1) in dissolved inorganic carbon, 4 mu mol kg(-1) in total alkalinity, 0.01-0.02 in pH, and 5% in the halogenated transient tracers. The compilation also includes data for several other variables, such as isotopic tracers. These were not subjected to bias comparison or adjustments.The original data, their documentation and DOI codes are available in the Ocean Carbon Data System of NOAA NCEI (https://www.nodc.noaa.gov/ocads/oceans/GLODAPv2_2019/, last access: 17 September 2019). 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/xnme-wr20 (Olsen et al., 2019). The product files also include significant ancillary and approximated data. These were obtained by interpolation of, or calculation from, measured data. This paper documents the GLODAPv2.2019 methods and provides a broad overview of the secondary quality control procedures and results.