LDEO Database (Version 2019): Global Ocean Surface Water Partial Pressure of CO2 Database: Measurements Performed During 1957-2019 (NCEI Accession 0160492)

Approximately 14.2 million measurements of surface water pCO2 made over the global oceans during 1957-2019 have been processed to make a uniform data file in this Version 2019. Measurements made in open oceans as well as in coastal waters are included. The data assembled include only those measured using equilibrator-CO2 analyzer systems, and have been quality-controlled based upon the stability of the system performance, the reliability of calibrations for CO2 analysis and the internal consistency of data. We have added 567,632 data points comprised of 158 leg/cruise segments in this version. All of these were collected on the 4 ships in our current field program. These 4 ships operate primarily in high latitudes in both hemispheres and have built decades long records in these areas. R/V Nathaniel B. Palmer’s system has been operating since 1995, R/V Laurence M. Gould’s system since 2001, USCGC Healy since 2011, R/V M. Langseth since 2010 (terminated in 2018), and R/V Sikuliaq since 2015. Our contribution to this database through many years of 3.31 million records is primarily for the polar and sub-polar seas. These underway data have been quality controlled and corrected for the time lag and temperature differences between the water intake and pCO2 measurements. In order to allow re-examination of the data in the future, a number of measured parameters relevant to pCO2 in seawater are listed. The overall uncertainty for the pCO2 values listed is estimated to be ± 2.5 uatm on the average. The names and institutional affiliations of the contributors are listed in Table 1. The documentation for the previous versions (V1.0, V2007, V2008, V2009, V2010, V2011, V2012, V2013, V2014, V2015, V2016, V2017, and V2018) of our database are available at NCEI via Ocean Carbon data System (OCADS) LDEO Database web page.

The global pCO2 dataset is available free of charge as a numeric data package (NDP) from the OCADS: https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/LDEO_Underway_Database/. The NDP consists of the oceanographic data files and this printed documentation, which describes the procedures and methods used to obtain the data.

1957-2019年间在全球海洋采集的约1420万项表层海水二氧化碳分压（pCO₂）测量数据已完成处理，形成本2019版统一数据集文件。数据集涵盖远洋及近岸海域的测量数据。本次整合的数据仅包含使用二氧化碳平衡仪分析仪系统（equilibrator-CO2 analyzer systems）获取的测量结果，并基于系统运行稳定性、二氧化碳分析校准可靠性以及数据内部一致性完成了质量控制。本版新增了158个航次分段（leg/cruise segments）对应的567632个数据点，全部来自当前野外作业计划中的4艘科考船。这4艘科考船主要在南北半球的高纬度海域作业，已在这些区域积累了数十年的观测记录：R/V Nathaniel B. Palmer号的观测系统自1995年起投入运行，R/V Laurence M. Gould号的系统自2001年起运行，USCGC Healy号自2011年起加入，R/V M. Langseth号自2010年起运行（2018年终止），R/V Sikuliaq号自2015年起投入使用。我方团队多年来累计贡献了331万条记录，主要覆盖极地及副极地海域。这些走航观测数据已完成质量控制，并针对取水口与二氧化碳分压测量之间的时间延迟及温度差异进行了校正。为便于未来对数据进行复现核查，本数据集列出了多项与海水二氧化碳分压相关的实测参数。所列二氧化碳分压数值的总不确定度平均约为±2.5微大气压（uatm）。数据贡献者的姓名及所属机构详见表1。本数据集过往版本（V1.0、V2007、V2008、V2009、V2010、V2011、V2012、V2013、V2014、V2015、V2016、V2017及V2018）的文档可通过美国国家环境信息中心（NCEI）下属的海洋碳数据系统（OCADS）兰蒙特-多尔蒂地球观测站数据库网页获取。

本全球海水二氧化碳分压数据集可通过海洋碳数据系统（OCADS）以数值数据包（NDP）形式免费获取，链接为：https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/LDEO_Underway_Database/。该数值数据包包含海洋学数据文件及本印刷版说明文档，后者详细阐述了数据获取的流程与方法。

搜集汇总

背景与挑战

背景概述

该数据集是一个全球海洋表面水二氧化碳分压（pCO2）的长期观测数据库，包含1957年至2019年间约1420万次测量，覆盖开阔海域和沿海水域。数据基于平衡器-CO2分析仪系统采集，经过严格质量控制，并重点关注高纬度极地和亚极地海域，为研究海洋碳循环和气候变化提供了高质量、统一的基础数据。