Spectrophotometric Measurement of Carbonate Ion in Seawater over a Decade: Dealing with Inconsistencies.

Spectrophotometric Measurement of Carbonate Ion in Seawater over a Decade: Dealing with Inconsistencies.
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十年来,海水中碳酸盐离子的分光光度测量:处理不一致。

DOI:
10.1021/acs.est.1c06083
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发表时间:
2022-06-21
影响因子:
11.4
通讯作者:
Alvarez, Marta
Alvarez, Marta
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Guallart, Elisa F.;Fajar, Noelia M.;Garcia-Ibanez, Maribel I.;Castano-Carrera, Monica;Santiago-Domenech, Rocio;Hassoun, Abed El Rahman;Perez, Fiz F.;Easley, Regina A.;Alvarez, Marta

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海水中碳酸根离子测定的分光光度法于2008年首次发表,并在试剂和配方方面不断发展。虽然快速,相对简单,负担得起,并可能易于在不同的平台和设施中实施离散和自主观测,但它在海洋酸化界的使用并不广泛。本研究使用2009年至2020年获得的合并超定CO2系统数据集(碳酸根离子,pH值和碱度),通过内部一致性分析和讨论不确定性来源,评估当前五种方法之间的差异。总体而言,结果表明,在本研究中,对于整个碳酸根离子含量范围,没有一种方法达到海洋酸化研究的气候目标(± 1%标准不确定度),但通常达到天气目标(± 10%标准不确定度)。在各种方法之间观察到的不一致性损害了各区域和各时间段数据集的一致性,突出表明需要一个经过验证的标准操作程序,用于分光光度法测量碳酸根离子,就像其他可测量的CO2变量一样。
The spectrophotometric methodology for carbonate ion determination in seawater was first published in 2008 and has been continuously evolving in terms of reagents and formulations. Although being fast, relatively simple, affordable, and potentially easy to implement in different platforms and facilities for discrete and autonomous observations, its use is not widespread in the ocean acidification community. This study uses a merged overdetermined CO2 system data set (carbonate ion, pH, and alkalinity) obtained from 2009 to 2020 to assess the differences among the five current approaches of the methodology through an internal consistency analysis and discussing the sources of uncertainty. Overall, the results show that none of the approaches meet the climate goal (± 1 % standard uncertainty) for ocean acidification studies for the whole carbonate ion content range in this study but usually fulfill the weather goal (± 10 % standard uncertainty). The inconsistencies observed among approaches compromise the consistency of data sets among regions and through time, highlighting the need for a validated standard operating procedure for spectrophotometric carbonate ion measurements as already available for the other measurable CO2 variables.
DOI: 10.5670/oceanog.2014.16
发表时间: 2014-03-01
期刊: OCEANOGRAPHY
影响因子: 2.8
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期刊: MARINE CHEMISTRY
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期刊: SCIENCE
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DOI: 10.1016/0021-9614(90)90074-z
发表时间: 1990-02-01
影响因子: 2.6
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