Ocean pH is projected to decrease (become more acidic) by ~0.1 pH units by 2030 and by ~0.3 pH units by 2100, with a slightly greater reduction in the Western Region moving to the Eastern Region(WaterTechnology, 2012). This equates to approximately 100% increase in the concentration of hydrogen ions by 2030 (Orr et al., 2005). The pH levels in Embayments are projected to decrease by >0.1 and >0.3 pH units by 2030 and 2100, respectively, although there is greater uncertainty around projections for Embayments than Ocean (WaterTechnology, 2012).
Bellgrove A., McKenzie J. & Cameron H., 2013. Implications of future climate for rocky reefs. In Implications of future climate for Victoria’s marine environment, Klemke J. & Arundel H. (Eds.), Glenelg Hopkins Catchment Management Authority Australia. Book chapter.
