14 Mar 2017
Andrew Hudson, Head of Water and Ocean Governance Programme, UNDP
The ‘recipe’ for reversing ocean acidification is transitioning to an energy efficient model that relies primarily on renewable sources of energy. Photo: UNDP
In the Sustainable Development Goals, the world has set forth a bold new vision for global development and committed to achieving it by the year 2030. SDG 14 calls for us to “conserve and sustainably use the oceans, seas and marine resources for sustainable development.” While most of the targets in SDG 14 cover ocean issues and challenges that are well known to most, such as pollution and overfishing, one SDG 14 target, 14.3, may not be so familiar:
14.3 Minimize and address the impacts of ocean acidification, including through enhanced scientific cooperation at all levels.
What is ocean acidification, and why is it so important to ocean sustainability and therefore to the SDG agenda? Let’s start with some basic chemistry concepts. Water can be either acidic, basic, or neutral, depending on the relative levels of hydrogen ions it contains. The higher the hydrogen level, the more acidic the solution. This characteristic is quantified in its pH, which runs on a scale from 0-14.
The scale is ‘logarithmic’ meaning that each increment of one is a 10-fold increase or decrease in hydrogen ion concentration. A pH below 7 is acidic, 7 is neutral, and above 7 is basic.