The modelling carried out in the SHIpH project will result in projections of the future pH of Baltic Sea waters, based on a number of different scenarios for atmospheric carbon dioxide, climate change, shipping volumes and adaptation to the increasingly strict regulation of acid release. Although current regulations have been introduced in order to protect air quality, this regulation should also have a positive effect on the marine environment though a reduction of acidification. In order to follow up these changes, and to verify the modelling approaches used, it will be necessary to monitor the changes in the pH of Baltic Sea waters.
Although pH is included in several national monitoring programmes, the methods currently used have relatively poor precision and accuracy. This final phase of the SHIpH project will develop recommendations for pH monitoring of the Baltic Sea, in particular the use of modern methods such as indicator spectrophotometry and/or fluorometry. The work on the measurement and interpretation of organic alkalinity may also have implications for future monitoring of this important parameter.