Articles | Volume 20, issue 5
https://doi.org/10.5194/os-20-1423-2024
https://doi.org/10.5194/os-20-1423-2024
Research article
 | 
30 Oct 2024
Research article |  | 30 Oct 2024

Alkalinity sources in the Dutch Wadden Sea

Mona Norbisrath, Justus E. E. van Beusekom, and Helmuth Thomas

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Cited articles

Abril, G. and Frankignoulle, M.: Nitrogen–alkalinity interactions in the highly polluted Scheldt basin (Belgium), Water Res., 35, 844–850, https://doi.org/10.1016/S0043-1354(00)00310-9, 2001. 
Beck, M., Dellwig, O., Holstein, J. M., Grunwald, M., Liebezeit, G., Schnetger, B., and Brumsack, H.-J.: Sulphate, dissolved organic carbon, nutrients and terminal metabolic products in deep pore waters of an intertidal flat, Biogeochemistry, 89, 221–238, https://doi.org/10.1007/s10533-008-9215-6, 2008a. 
Beck, M., Dellwig, O., Liebezeit, G., Schnetger, B., and Brumsack, H.-J.: Spatial and seasonal variations of sulphate, dissolved organic carbon, and nutrients in deep pore waters of intertidal flat sediments, Estuar. Coast. Shelf S., 79, 307–316, https://doi.org/10.1016/j.ecss.2008.04.007, 2008b. 
Berner, R. A., Scott, M. R., and Thomlinson, C.: Carbonate alkalinity in the pore waters of anoxic marine sediments, Limnol. Oceanogr., 15, 544–549, https://doi.org/10.4319/lo.1970.15.4.0544, 1970. 
Berner, R. A., Lasaga, A. C., and Garrels, R. M.: Carbonate-silicate geochemical cycle and its effect on atmospheric carbon dioxide over the past 100 million years, Am. J. Sci., 283, 641–683, https://doi.org/10.2475/ajs.283.7.641, 1983. 
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Short summary
We present an observational study investigating total alkalinity (TA) in the Dutch Wadden Sea. Discrete water samples were used to identify the TA spatial distribution patterns and locate and shed light on TA sources. By observing a tidal cycle, the sediments and pore water exchange were identified as local TA sources. We assumed metabolically driven CaCO3 dissolution as the TA source in the upper, oxic sediments and anaerobic metabolic processes as TA sources in the deeper, anoxic ones.