Program

The coastal ocean ecosystem is subject to various anthropogenic forcings and thus is particularly vulnerable. Examples of these stressors on the coastal ecosystems include temperature rising, eutrophication and its associated hypoxia, ocean acidification. This presentation will start with the illustration of different drivers that may induce ocean acidification in the coastal ecosystem in addition to the anthropogenic CO₂ rising. The presentation will be followed by deoxygenation, or hypoxia in the coastal ocean. Case studies are provided demonstrating the combined effects of ocean acidification, deoxygenation and upwelling of low pH waters as well as submarine groundwater discharge. Using a semi-analytical diagnostic method that coupled physical dynamics and biogeochemistry & coupled C, N and O, this study will then assess how these interplayed processes could be decomposed and how ocean acidification is enhanced in the coastal ocean.