Technical note: Interpreting pH changes

Technical note: Interpreting pH changes
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DOI:
10.5194/bg-18-1407-2021
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发表时间:
2021-02-24
期刊:
影响因子:
4.9
通讯作者:
Dickson, Andrew G.
Dickson, Andrew G.
中科院分区:
地球科学2区
文献类型:
--
作者:
Fassbender, Andrea J.;Orr, James C.;Dickson, Andrew G.

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过去几十年来,海洋 pH 测量的数量和质量大幅提高,因此现在正在评估变化的趋势、变异性和空间模式。然而,比较具有不同初始 pH 值的域之间的 pH 变化可能会产生误导,因为 pH 变化反映的是氢离子浓度([HC],以 mol kg(-1) 表示)的相对变化,而不是 [HC] 的绝对变化。我们建议在描述此类变化时除了 pH 值外还使用 [HC],并提供三个示例来说明原因。
The number and quality of ocean pH measurements have increased substantially over the past few decades such that trends, variability, and spatial patterns of change are now being evaluated. However, comparing pH changes across domains with different initial pH values can be misleading because a pH change reflects a relative change in the hydrogen ion concentration ([HC], expressed in mol kg(-1)) rather than an absolute change in [HC]. We recommend that [HC] be used in addition to pH when describing such changes and provide three examples illustrating why.