Modelling organic alkalinity in the Baltic Sea using a Humic-Pitzer approach

Actam Ulfsbo; Karol Kulinski; Leif G. Anderson; David R. Turner

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Modelling organic alkalinity in the Baltic Sea using a Humic-Pitzer approach

机译：使用Humic-Pitzer方法模拟波罗的海的有机碱度

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Significant excess alkalinity, of the order of 30 μmol kg~(-1) and attributed to dissolved organic matter, has recently been measured in the Baltic Sea. Chemical speciation modelling shows that the measured excess alkalinity is consistent with an organic alkalinity derived from dissolved organic carbon, assuming that this dissolved organic carbon consists entirely of terrestrial humic substances. The contribution of polydisperse material such as humic substances to titration alkalinity invalidates the assumptions on which the current definition of titration alkalinity is based. It is therefore concluded that alkalinity should currently not be one of the parameters used to characterise the CO_2 system in organic-rich waters. The use of a simple relationship to estimate organic alkalinity from the dissolved organic carbon concentration is assessed for the limited Baltic Sea data set currently available.

机译：最近在波罗的海测量到明显的过量碱度，约为30μmolkg〜（-1），归因于溶解的有机物。化学形态建模表明，假设该溶解的有机碳完全由陆地腐殖质组成，则测得的过量碱度与源自溶解的有机碳的有机碱度一致。诸如腐殖质之类的多分散材料对滴定碱度的贡献使目前的滴定碱度定义所基于的假设无效。因此得出的结论是，碱度当前不应成为表征富含有机物的水中CO_2系统特征的参数之一。对于当前可用的有限的波罗的海数据集，评估了使用简单关系从溶解的有机碳浓度估算有机碱度的方法。

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来源
《Marine Chemistry》 |2015年第1期|18-26|共9页
作者
Actam Ulfsbo; Karol Kulinski; Leif G. Anderson; David R. Turner;
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作者单位

Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden;

Institute of Oceanology, Polish Academy of Sciences, IO PAN, ul. Powstancow Warszawy 55,81-722 Sopot, Poland;

Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden;

Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden;

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原文格式 PDF
正文语种 eng
中图分类
关键词
Alkalinity; Fulvic acid; Dissolved organic matter; Baltic Sea; WHAM;

机译：碱度;黄腐酸;溶解的有机物;波罗的海;锤子;

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Modelling organic alkalinity in the Baltic Sea using a Humic-Pitzer approach

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