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Earth System Dynamics An interactive open-access journal of the European Geosciences Union

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doi:10.5194/esd-2017-39
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Review article
12 Apr 2017
Review status
This discussion paper is under review for the journal Earth System Dynamics (ESD).
Structure and functioning of the acid-base system in the Baltic Sea
Karol Kuliński1, Bernd Schneider2, Beata Szymczycha1, and Marcin Stokowski1 1Institute of Oceanology, Polish Academy of Sciences, IO PAN, ul. Powstańców Warszawy 55, 81-712 Sopot, Poland
2Leibniz Institute for Baltic Sea Research, IOW, Seestrasse 15 Warnemünde, D-18119 Rostock, Germany
Abstract. The marine acid-base system is relatively well understood for oceanic waters. Its structure and functioning is less obvious for the coastal and shelf seas due to the number of regionally specific anomalies. In this review article we collect and integrate existing knowledge on the acid-base system in the Baltic Sea. Hydrographical and biogeochemical characteristics of the Baltic Sea, as manifested in horizontal and vertical salinity gradients, permanent stratification of the water column, eutrophication, high organic matter concentrations and high anthropogenic pressure, makes the acid-base system complex. We summarize in this study the general knowledge on the marine acid-base system as well as we describe the peculiarities identified and reported for the Baltic Sea specifically. In this context we discuss issues such as: dissociation constants in the brackish water, different chemical alkalinity models including contributions by organic acid-base systems, long term changes of total alkalinity, anomalies of borate alkalinity and thee acid-base effects of biomass production and mineralization. Finally, we identify research gaps and specify bottlenecks concerning Baltic Sea acid-base system.

Citation: Kuliński, K., Schneider, B., Szymczycha, B., and Stokowski, M.: Structure and functioning of the acid-base system in the Baltic Sea, Earth Syst. Dynam. Discuss., doi:10.5194/esd-2017-39, in review, 2017.
Karol Kuliński et al.
Karol Kuliński et al.
Karol Kuliński et al.

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Short summary
This review describes the general knowledge on the marine acid-base system as well as the peculiarities identified and reported for the Baltic Sea specifically. We discuss issues such as: dissociation constants in the brackish water, structure of the total alkalinity in the Baltic Sea, long term changes of total alkalinity, and the acid-base effects of biomass production and mineralization. We identify research gaps and specify bottlenecks concerning Baltic Sea acid-base system.
This review describes the general knowledge on the marine acid-base system as well as the...
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