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Jens Daniel Müller

Ocean acidification in the Baltic Sea : involved processes, metrology of pH in brackish waters, and calcification under fluctuating conditions

Universität Rostock, 2018

Abstract: Globally, ocean acidification presents a threat to marine ecosystems. In the Baltic Sea, this process could so far not be quantified, partly due to a lack of appropriate pH observations. This study unravels a positive alkalinity trend in the Baltic Sea over the past two decades that counteracted acidification. Further, state-of-the-art spectrophotometric pH measurements in brackish waters are enabled by characterizing pH buffer solutions and the indicator dye m-Cresol purple at low salinities. Finally, pH fluctuations and their implications for benthic ecosystems are examined.

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