WHAT DO WE KNOW ABOUT WHAT WE CAN DO ABOUT ACIDIFICATION?
Our understanding of acidification in coastal and estuarine systems is quickly advancing, and we now see evidence of anthropogenic influences on a range of global and local drivers of coastal acidification. Increasing atmospheric CO2 concentrations lower oceanic surface pH, and consume carbonate ions, lowering the saturation state of aragonite. In addition, in many coastal areas, increases in anthropogenic nutrient pollution, increases in low-alkalinity freshwater delivery and upwelling of CO2-rich deep ocean water to coastal systems can drive coastally-enhanced acidication. The relative contribution of these drivers to the variability of pH and aragonite saturation state change in the coastal ocean has only just begun to be characterized, but the increased attention to the impacts of anthropogenically altered carbonate chemistry in coastal and estuarine ecosystems has driven a rapid rise in interest in taking actions to mitigate drivers of acidification at fine spatial scales. While the multitude of biological, hydrodynamic, and human factors affecting carbonate chemistry in estuarine environments can present challenges, ultimately the the effectiveness of ocean acidification mitigation, remediation and adaptation planning actions currently contemplated in estuaries must be a function of monitoring modeling, and experimental science. Here, in order to advance sustainability science actions at the science-policy interface, I present a framework for the consideration of uncertainty in decision-making on when and how to pursue mitigation and remediation actions to address coastal acidification.
Strong, A. L., University of Maine, USA, firstname.lastname@example.org
Location: 305 A/B
Presentation is given by student: No